BOK FINANCIAL CORP ET AL
S-4, 1996-11-18
NATIONAL COMMERCIAL BANKS
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<PAGE>
 

As filed with the Securities and Exchange Commission on November 18, 1996
                                                  Registration No. ____________
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                ----------------
                                    FORM S-4

            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                ----------------
                           BOK FINANCIAL CORPORATION
             (Exact name of registrant as specified in its charter)

           Oklahoma                         6712                  73-1373454
                                            ----
(State or other jurisdiction of  (Primary Standard Industrial  (I.R.S. Employer
 incorporation or organization)  Classification Code Number) Identification No.)

                             Bank of Oklahoma Tower
                         Boston Avenue at Second Street
                             Tulsa, Oklahoma 74172
                                 (918) 588-6000
                  (Address, including zip code, and telephone
             number, including area code of registrant's principal
                               executive offices)

                                James A. White,
              Executive Vice President and Chief Financial Officer
                           BOK FINANCIAL CORPORATION
                             Bank of Oklahoma Tower
                         Boston Avenue at Second Street
                             Tulsa, Oklahoma 74172
                                 (918) 588-6416
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                 With copies to:

                                Frederic Dorwart
                                  Old City Hall
                             124 East Fourth Street
                           Tulsa, Oklahoma 74103-5010
                           (918) 583-9945 - Telephone
                           (918) 583-8251 - Facsimile

         Approximate date of commencement of proposed issuance to the public: As
soon as practicable after this Registration Statement becomes effective.

                              -------------------
         If any of the securities being registered on this Form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, other than securities offered only in connection with
dividend or interest reinvestment plans, check the following box.
[ ]
                         CALCULATION OF REGISTRATION FEE

================================================================================
<TABLE>
<CAPTION>
                                                Proposed           Proposed
                                                maximum            maximum
  Title of each             Amount              offering          aggregate         Amount of
class of securities         to be                price            offering        Registration
to be registered          registered           per share           price              fee
- --------------------------------------------------------------------------------------------------------------
<S>                       <C>                    <C>             <C>                 <C> 
Promissory Notes          $51,978,000            At Par          $51,978,000         $15,733

==============================================================================================================
</TABLE>

     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.

                                                             Page ____ of ____.
<PAGE>
 
                           BOK FINANCIAL CORPORATION

         Cross Reference Sheet Showing Location in Prospectus of Information
Required to be included in Prospectus in Response to Items of Form S-4, Pursuant
to Item 501 of Regulation S-K.

Item #      Form S-4 Item                             Caption in Prospectus
- ------      -------------                             ---------------------

Item 1:     Forepart of Registration Statement
            and Outside Front Cover Page
            of Prospectus.........................    Forepart and Front Cover;
                                                      Page of Prospectus

Item 2:     Inside Front and Outside Back
            Cover Pages of Prospectus.............    Inside Front Cover;
                                                      Available Information;
                                                      Table of Contents

Item 3:     Risk Factors, Ratio of Earnings to
            Fixed Charges and Other Information...    BOK Financial Corporation;
                                                      Park Cities Bancshares,
                                                      Inc.; Description of the
                                                      Transaction; Selective
                                                      Comparative Per Share Data
                                                      (Unaudited); Park Cities
                                                      Supplementary Financial
                                                      Information; Pro Forma
                                                      Combined Selected
                                                      Financial Data; Risk
                                                      Factors; BOKF Ratio of
                                                      Earnings to Fixed Charges

Item 4:     Terms of the Transaction..............    Description of the
                                                      Transaction; Purpose of
                                                      the Transaction

Item 5:     Pro Forma Financial Information.......    Not Applicable

Item 6:     Material Contacts with the Company 
            Being Acquired........................    Description of the 
                                                      Transaction

Item 7:     Additional Information Required for
            Reoffering by Persons and Parties
            Deemed to Be Underwriters.............    Not Applicable

Item 8:     Interests of Named Experts and Counsel    Legal Opinion; Experts

Item 9:     Disclosure of Commission Position
            on Indemnification for Securities
            Act Liabilities.......................    Indemnification

Item 10:    Information With Respect to S-3
            Registrants...........................    Not Applicable

                                                            Page ____ of ____.
<PAGE>
 
Item 11:     Incorporation of Certain
             Information by Reference.............    Not Applicable

Item 12:     Information With Respect to S-2 or
             S-3 Registrants......................    Delivery of BOKF 1995
                                                      Annual Report and Third
                                                      Quarter 1996 Quarterly
                                                      Report

Item 13:     Incorporation of Certain Information
             by Reference.........................    Incorporation of Certain
                                                      Documents by Reference,
                                                      Description of BOKF
                                                      Capital Stock; BOKF
                                                      Preferred Stock; BOKF
                                                      Common Stock Market and
                                                      Dividends

Item 14:     Information with Respect to 
             Registrants Other Than S-2 or S-3 
             Registrants..........................    Not Applicable

Item 15:     Information With Respect to S-3 
             Companies............................    Not Applicable

Item 16:     Information With Respect to S-2
             or S-3 Companies.....................    Not Applicable

Item 17:     Information With Respect to Companies
             Other than S-3 or S-2 Companies......    Information About Park
                                                      Cities; Park Cities
                                                      Consolidated Financial
                                                      Information; Park Cities
                                                      Common Stock

Item 18:     Information if Proxies, Consents or
             Authorizations are to be Solicited...    Not Applicable

Item 19:     Information if Proxies, Consents or
             Authorizations are not to be 
             Solicited or in an Exchange Offer....    Information About Park
                                                      Cities; Park Cities
                                                      Shareholders Meeting;
                                                      Appraisal Rights;
                                                      Incorporation of Certain
                                                      Documents by Reference;
                                                      Security Ownership of
                                                      Certain Beneficial Owners
                                                      of Park Cities Common
                                                      Stock; Security Ownership
                                                      of Management in Park
                                                      Cities Common Stock;
                                                      Compensation of Park
                                                      Cities Executives;
                                                      Interest of Park Cities
                                                      Directors and Officers in
                                                      the Merger

                                                            Page ____ of ____.
<PAGE>
 
                         PARK CITIES BANCSHARES, INC.
                             6215 HILLCREST AVENUE
                              DALLAS, TEXAS 75205
                                (214) 522-5858

                             January // ____, 1997

Dear Shareholder:

         There will be a meeting of those shareholders (the "Control Group") of
Park Cities Bancshares, Inc. ("Park Cities") who are party to the Shareholders
Agreement dated May 6, 1991 (the "Shareholders Agreement") at the University
Park City Hall Auditorium, 3800 University Boulevard, University Park, Texas
75205, commencing at 10:00 a.m. on February 7, 1997. After completion of such
meeting, at 10:30 a.m., a Special Meeting of Shareholders of the Company will be
held at the same location (the "Special Meeting").

         At the meeting of the Control Group, you will be asked to vote to
approve the Agreement and Plan of Merger between Park Cities and BOK Financial
Corporation dated October 3, 1996 which the Park Cities directors have approved
and recommended to the shareholders and waive their right and option to purchase
the Park Cities Common Stock under the Shareholders Agreement. The Notice of
Special Meeting of Shareholders and the Prospectus/Proxy Statement, which are
being delivered to you with this letter, describe the Control Group Meeting, the
Special Meeting, and the proposed Merger.

         Under the terms of the Shareholders Agreement, the Control Group votes
as a block on those matters presented for a vote of the shareholders of Park
Cities. If all of the shareholders comprising the Control Group do not agree
upon how to cast their votes, all such shareholders are nevertheless required to
cast their votes in accordance with the votes cast by the holders of a majority
of the shares subject to the Shareholders Agreement. Please plan to attend the
meeting of the Control Group, or alternatively, please sign and return the
enclosed Proxy indicating how you wish your vote to be cast at the meeting. By
signing the Proxy, you will be authorizing the named agent to cast your vote at
the Control Group Meeting for the Merger and the trustee under the Shareholders
Agreement to cast your vote at the Special Meeting in accordance with the votes
of the holders of a majority of the shares held by the Control Group as provided
in the Shareholders Agreement.

         The proposed Merger represents a significant development for Park
Cities. The Board of Directors and management believe that, if the Merger is
approved, the shareholders will be putting First National Bank of Park Cities
(the "Bank") in good hands. We have been impressed with the professionalism and
approach displayed by the management of BOK Financial Corporation. Even though
ownership will change, the Bank's name and management will remain unchanged. In
addition, BOK Financial Corporation has invited the existing directors of the
Bank to continue as directors. The Board of Directors and management believe
that all of the above actions evidence BOK Financial Corporation's goal of
providing the Bank access to valuable services and ideas which will enable the
existing management of the Bank to do a better job in serving the Bank's
customers, without changing the personal touch which is the Bank's hallmark.

         On behalf of the Board of Directors, thank you for your continued
support.

                               Sincerely yours,

                               /s/ Tom E. Turner
                                 Tom E. Turner
                           Chairman of the Board and
                            Chief Executive Officer

                                                            Page ____ of ____.
<PAGE>
 
                         PARK CITIES BANCSHARES, INC.
                             6215 HILLCREST AVENUE
                              DALLAS, TEXAS 75205
                                (214) 522-5858

                             January //____, 1997

Dear Shareholder:

         You are cordially invited to attend a Special Meeting of Shareholders
of Park Cities Bancshares, Inc. ("Park Cities") scheduled to be held on February
7, 1997 at the University Park City Hall Auditorium, 3800 University Boulevard,
University Park, Texas 75205, commencing at 10:30 a.m., local time. The Board of
Directors and management of the Company look forward to greeting personally
those shareholders able to attend.

         At the meeting, shareholders are being asked to approve an Agreement
and Plan of Merger between Park Cities and BOK Financial Corporation dated
October 3, 1996, which the directors have approved and recommended. The Notice
of Special Meeting of Shareholders and Prospectus/Proxy Statement, which are
being delivered to you with this letter, describe the Special Meeting and the
proposed Merger.

         The proposed Merger represents a significant development for Park
Cities. The Board of Directors and management believe that, if the Merger is
approved, the shareholders will be putting First National Bank of Park Cities
(the "Bank") in good hands. We have been impressed with the professionalism and
approach displayed by the management of BOK Financial Corporation. Even though
ownership will change, the Bank's name and management will remain unchanged. In
addition, BOK Financial Corporation has invited the existing directors of the
Bank to continue as directors. The Board of Directors and management believe
that all of the above actions evidence BOK Financial Corporation's goal of
providing the Bank access to valuable services and ideas which will enable the
existing management of the Bank to do a better job in serving the Bank's
customers, without changing the personal touch which is the Bank's hallmark.

         It is important that your shares be represented at the meeting.
Accordingly, if you cannot attend the meeting, please sign, date and return the
enclosed proxy in the envelope provided for your convenience.

         On behalf of the Board of Directors, thank you for your continued
support.

                                  Sincerely,

                               /s/ Tom E. Turner

                                 Tom E. Turner
                           Chairman of the Board and
                            Chief Executive Officer

                                                            Page ____ of ____.
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                              6215 HILLCREST AVENUE
                               DALLAS, TEXAS 75205
                                 (214) 522-5858

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                           To Be Held February 7, 1997

         NOTICE IS HEREBY GIVEN that a Special Meeting of Shareholders of Park
Cities Bancshares, Inc. ("Park Cities") will be held at the University Park City
Hall Auditorium, 3800 University Boulevard, University Park, Texas, at 10:30
a.m. local time on Friday, February 7, 1997 for the following purposes:

         (1)      To approve the Agreement and Plan of Merger between Park
                  Cities and BOK Financial Corporation dated October 3, 1996.

         (2)      To transact such other business as may properly come before
                  the meeting or any adjournments thereof.

         The close of business on January 13, 1997 has been fixed as the record
date for determining the shareholders entitled to notice of and to vote at the
Special Meeting of Shareholders or any adjournments thereof.

         Information concerning the matters to be acted upon at the Special
Meeting is set forth in the accompanying Prospectus/Proxy Statement.

         SHAREHOLDERS WHO DO NOT EXPECT TO BE PRESENT AT THE MEETING IN PERSON
ARE URGED TO COMPLETE, DATE, SIGN AND RETURN THE ENCLOSED PROXY IN THE
ACCOMPANYING ENVELOPE, WHICH REQUIRES NO POSTAGE IF MAILED IN THE UNITED STATES.

                                        By Order of the Board of Directors

                                        /s/ Tom E. Turner
                                        ----------------------------------------
                                        Tom E. Turner, Chairman of the Board
                                        and Chief Executive Officer
                                        Park Cities Bancshares, Inc.

Dallas, Texas
January //____, 1997

                                                             Page ____ of ____.
<PAGE>
 
                                     PROXY
                         FOR THE CONTROL GROUP MEETING
                                    AND THE
                      SPECIAL MEETING OF SHAREHOLDERS OF
                         PARK CITIES BANCSHARES, INC.

         The undersigned shareholder (the "Undersigned") of Park Cities
Bancshares, Inc. ("Park Cities"), hereby appoints Edward O. Boshell, Jr. and Ben
R. Briggs or either of them, as proxies, attorneys and agents of the
Undersigned, with full power of substitution to vote in the name and on behalf
of the Undersigned at a meeting of shareholders (the "Control Group") party to
the Shareholders Agreement (the "Control Group Meeting") dated May 6, 1991 (the
"Shareholders Agreement") to be held at the University Park City Hall
Auditorium, 3800 University Boulevard, University Park, Texas 75205, on Friday,
February 7, 1997 at 10:00 a.m., local time, and all adjournments thereof, all
the shares of stock of Park Cities which the Undersigned would be entitled to
vote if personally present, with all the powers the Undersigned would possess if
personally present:

         (1)      To approve the Agreement and Plan of Merger between Park
                  Cities and BOK Financial Corporation dated October 3, 1996,
                  and waive their right and option to purchase the Park Cities
                  Common Stock under the Shareholders Agreement.

                           FOR [ ]                AGAINST [ ]

         (2)      To vote or otherwise represent the shares on any other
                  business or on other matters which should properly come before
                  the meeting or any adjournments thereof according to their
                  discretion.

         The Undersigned understands that pursuant to the terms of the
Shareholders Agreement, Tom E. Turner, as trustee thereunder, will vote the
Undersigned's shares at the Special Meeting of Shareholders of Park Cities to be
held at the same location as the Control Group Meeting at 10:30 a.m., local
time, on February 7, 1997 (immediately following the Control Group Meeting), as
directed by a vote of the holders of a majority of the shares held by the
Control Group.

                                   ------------------------------------------
                                   Signature

                                   ------------------------------------------
                                   Please Print Name

          ELECTION TO RECEIVE PART OR ALL OF THE MERGER CONSIDERATION
          -----------------------------------------------------------
                          IN THE FORM OF A BOKF NOTE
                          --------------------------
              (THIS ELECTION IS TO BE COMPLETED WHETHER YOU VOTE
    FOR OR AGAINST THE PROPOSED MERGER IF YOU WANT TO RECEIVE A BOKF NOTE)

         The Undersigned represents that the Undersigned is the owner of
__________ shares of Park Cities Common Stock and the Total Merger Consideration
in respect of such shares is $43.5679 times such number of shares: $43.5679 x
__________ = $_______________. If the Agreement and Plan of Merger is approved,
the Undersigned hereby elects to receive $_______________ of the Total Merger
Consideration due the Undersigned in the form of a BOKF Note having a maturity
of _______ years (insert a desired maturity of not less than one, nor more than
five years) after the consummation of the Merger. The Undersigned understands
that the Merger Consideration will be paid in cash except to the extent the
Undersigned elects to receive part or all of the Merger Consideration in the
form of a BOKF Note. If no maturity date is specified, the BOKF Note will have a
maturity of one year after consummation of the Merger.

                                   ------------------------------------------
                                   Signature

                                   ------------------------------------------
                                   Please Print Name

             Please Sign The Proxy As Your Ownership Is Reflected
                         On the Records of Park Cities

                                                            Page ____ of ____.
<PAGE>
 
                                     PROXY
                  FOR THE SPECIAL MEETING OF SHAREHOLDERS OF
                         PARK CITIES BANCSHARES, INC.

         The undersigned shareholder ("Undersigned") of Park Cities Bancshares,
Inc. ("Park Cities"), hereby appoints Edward 0. Boshell, Jr. and Ben R. Briggs
or either of them, as proxies, attorneys and agents of the Undersigned, with
full power of substitution to vote in the name and on behalf of the Undersigned
at the Special Meeting to be held at the University Park City Hall Auditorium,
3800 University Boulevard, University Park, Texas 75205, on Friday, February 7,
1997 at 10:30 a.m., local time, and all adjournments thereof, all the shares of
stock of Park Cities which the Undersigned would be entitled to vote if
personally present, with all the powers the Undersigned would possess if
personally present:

         (1)      To approve the Agreement and Plan of Merger between Park
                  Cities and BOK Financial Corporation dated October 3, 1996.

                           FOR [ ]                AGAINST [ ]

         (2)      To vote or otherwise represent the shares on any other
                  business or on other matters which should properly come before
                  the meeting or any adjournments thereof according to their
                  discretion.

                                   __________________________________________
                                   Signature

                                   ------------------------------------------
                                   Please Print Name

          ELECTION TO RECEIVE PART OR ALL OF THE MERGER CONSIDERATION
                          IN THE FORM OF A BOKF NOTE

              (THIS ELECTION IS TO BE COMPLETED WHETHER YOU VOTE
    FOR OR AGAINST THE PROPOSED MERGER IF YOU WANT TO RECEIVE A BOKF NOTE)

         The Undersigned represents that the Undersigned is the owner of
__________ shares of Park Cities Common Stock and the Total Merger Consideration
in respect of such shares is $43.5679 times such number of shares: $43.5679 x
__________ = $_______________. The Undersigned hereby elects to receive
$_______________ of the Total Merger Consideration due the Undersigned in the
form of a BOKF Note having a maturity of _______ years (insert a desired
maturity of not less than one, nor more than five years) after the consummation
of the Merger. The Undersigned understands that the Merger Consideration will be
paid in cash except to the extent the Undersigned elects to receive part or all
of the Merger Consideration in the form of a BOKF Note. If no maturity date is
specified, the BOKF Note will have a maturity of one year after consummation of
the Merger.

                                  ------------------------------------------
                                  Signature

                                  ------------------------------------------
                                  Please Print Name

             Please Sign The Proxy As Your Ownership Is Reflected
             ----------------------------------------------------
                         On the Records of Park Cities
                         -----------------------------

                                                             Page ____ of ____.
<PAGE>
 
          JOINT PROSPECTUS AND PROXY STATEMENT DATED January ****, 1997
            PROSPECTUS FOR BOK FINANCIAL CORPORATION PROMISSORY NOTES
                                       and
               PROXY STATEMENT FOR SPECIAL MEETING OF SHAREHOLDERS
           OF PARK CITIES BANCSHARES, INC. TO BE HELD FEBRUARY 7, 1997

         This Joint Prospectus and Proxy Statement ("Prospectus") relates to (i)
a proposed merger in which BOK Financial Corporation ("BOK Financial,"or "BOKF")
will acquire Park Cities Bancshares, Inc. ("Park Cities") and (ii) a maximum of
$51,978,000 of promissory notes which BOK Financial may issue in connection
therewith. BOK Financial is a bank holding company under the Bank Holding
Company Act of 1956 organized under the laws of the State of Oklahoma. See BOK
FINANCIAL CORPORATION. Park Cities is a bank holding company under the Bank
Holding Company Act of 1956 organized under the laws of the State of Texas. See
PARK CITIES.

         The promissory notes ("BOKF Notes") are offered to holders of Common
Stock of Park Cities in connection with the acquisition of Park Cities by BOK
Financial in a three party merger in which BOKF Merger Corporation Number Five
("BOKFSub"), a wholly owned subsidiary of BOK Financial, will be merged into
Park Cities (the "Merger"). In the Merger, BOKF will pay an amount equal to
$43.5679 per share for each share of Park Cities Common Stock, par value $5.00
per share ("Park Cities Common Stock") or a total consideration of $51,978,000
for all of the outstanding shares of Park Cities. See DESCRIPTION OF
TRANSACTION.

         Each Park Cities shareholder will have the right to elect to receive
(i) cash, (ii) a BOKF Note, or (iii) a combination of cash and a BOKF Note. Each
BOKF Note will have a maturity date selected by the applicable Park Cities
shareholder of not less than one nor more than five years. Interest only, at the
Applicable Federal Rate under the Internal Revenue Code in effect on the
effective date of the Merger, will be paid quarterly. Principal will be paid at
maturity. The BOKF Notes will be uninsured and unsecured general obligations of
BOK Financial. There is no market for the BOKF Notes and none will be
established. The BOKF Notes will be dated as of the consummation date. The cash
portion of the Merger Consideration will be paid following consummation without
interest. See ELECTION TO RECEIVE BOKF NOTE.

         The Merger is subject to approval by the holders of two-thirds of the
issued and outstanding Park Cities Common Stock. A meeting of the Park Cities
shareholders will be held on February 7, 1997 to consider the Merger. As of
November 15, 1996, 656,019 shares of the Park Cities Common Stock were subject
to a Shareholders Agreement (as hereafter defined) pursuant to which the holders
have agreed to vote their shares in accordance with the vote of the holders of a
majority of the shares subject to the Shareholders Agreement. The directors and
officers of Park Cities together control approximately 55.4% of the shares
subject to the Shareholders Agreement and intend to vote to approve the Merger.
Park Cities shareholders who dissent, other than with Shareholders subject to
the Shareholders Agreement, will have appraisal rights pursuant to Articles
5.11, 5.12 and 5.13 of the Texas Business Corporation Act. See PARK CITIES
SHAREHOLDERS MEETING and APPRAISAL RIGHTS.

         THE SECURITIES OFFERED BY THIS PROSPECTUS INVOLVE A RISK OF LOSS. See
RISK FACTORS. THE SECURITIES OFFERED HEREBY HAVE NOT BEEN APPROVED OR
DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                                             Page ____ of ____.

                                     - 1 -
<PAGE>
 
                              AVAILABLE INFORMATION
                              ---------------------

         BOK Financial has filed with the Securities and Exchange Commission
(the "Commission") a Registration Statement under the Securities Act of 1933
(the "33 Act") with respect to the BOKF Notes offered by this Prospectus. This
Prospectus does not contain all of the information set forth in the Registration
Statement, certain parts of which have been omitted in accordance with the rules
and regulations of the Commission.

         This Prospectus incorporates by reference documents that are not
presented herein or delivered herewith. These documents are available, without
charge, upon written request to BOK Financial Corporation, Bank of Oklahoma
Tower, Tulsa, Oklahoma 74172 or telephone number (918) 588-6752, Attention: Ms.
Marjorie Phillips. In order to insure timely delivery of the documents, any
request should be made by January 30, 1997.

         BOKF is currently subject to the informational requirements of the
Securities Exchange Act of 1934 (the "Exchange Act") and, in accordance
therewith, files reports, proxy statements and other information with the
Commission. Such reports and other information can be inspected and copied at
the public reference facilities maintained by the Commission at Room 1024, 450
Fifth Street, N. W., Washington, D.C. 20549; and at its Fort Worth Regional
Office, 503 U.S. Courthouse, 10th and Lamar Streets, Fort Worth, Texas 76102.
Copies of such material can be obtained at prescribed rates by writing to the
Securities and Exchange Commission, Public Reference Section, Room 1024, 450
Fifth Street, N.W., Washington, D.C. 20549. BOKF Common Stock is traded on the
facilities of NASDAQ under the trading symbol "BOKF".

                            -----------------------


         NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS IN CONNECTION WITH THE OFFER
AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED
UPON AS HAVING BEEN AUTHORIZED BY BOK FINANCIAL OR ANY OTHER PERSON. NEITHER THE
DELIVERY OF THIS PROSPECTUS NOR ANY ACCEPTANCE HEREUNDER SHALL, UNDER ANY
CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF BOK FINANCIAL SINCE THE RESPECTIVE DATES AS OF WHICH INFORMATION IS
GIVEN HEREIN. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO ISSUE ANY
SECURITIES OTHER THAN THE SECURITIES COVERED BY THIS PROSPECTUS, BY BOK
FINANCIAL OR ANY OTHER PERSON, OR AN OFFER OR SOLICITATION OF SUCH SECURITIES BY
BOK FINANCIAL OR ANY SUCH OTHER PERSON IN ANY JURISDICTION TO ANY PERSON TO WHOM
IT IS UNLAWFUL TO MAKE ANY SUCH OFFER OR SOLICITATION.

                                                           Page ____ of ____.

                                     - 2 -
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------

                                                                           Page
                                                                           ----

BOK FINANCIAL CORPORATION..................................................   5

PARK CITIES BANCSHARES, INC. ..............................................   5

DESCRIPTION OF THE TRANSACTION.............................................   5

PURPOSE OF THE TRANSACTION.................................................   7

RISK FACTORS...............................................................  11

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE............................  13

DELIVERY OF BOKF 1995 ANNUAL REPORT AND THIRD QUARTER
1996 QUARTERLY REPORT......................................................  14

SELECTIVE COMPARATIVE PER SHARE DATA (UNAUDITED)...........................  14

PRO FORMA COMBINED SELECTED FINANCIAL DATA.................................  15

BOKF COMMON STOCK MARKET AND DIVIDENDS.....................................  16

PARK CITIES COMMON STOCK...................................................  16

PARK CITIES SHAREHOLDERS MEETING...........................................  16

ELECTION TO RECEIVE BOKF NOTE..............................................  18

FEDERAL INCOME TAX CONSEQUENCES............................................  19

BOK FINANCIAL RATIO OF EARNINGS TO FIXED CHARGES...........................  20

TRUST INDENTURE............................................................  21

APPRAISAL RIGHTS...........................................................  21

PARK CITIES BOARD OF DIRECTORS.............................................  24

INFORMATION ABOUT PARK CITIES..............................................  26

PARK CITIES SELECTED CONSOLIDATED FINANCIAL INFORMATION....................  33

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS OF

                                                             Page ____ of ____.

                                      - 3 -
<PAGE>
 
PARK CITIES COMMON STOCK...................................................  35

SECURITY OWNERSHIP OF MANAGEMENT IN
PARK CITIES COMMON STOCK...................................................  36

COMPENSATION OF PARK CITIES EXECUTIVES.....................................  38

INTEREST OF PARK CITIES DIRECTORS AND OFFICERS IN THE MERGER...............  40

DESCRIPTION OF BOKF CAPITAL STOCK..........................................  40

BOKF PREFERRED STOCK.......................................................  41

INDEMNIFICATION............................................................  43

LEGAL OPINION..............................................................  44

EXPERTS....................................................................  44

ADDITIONAL INFORMATION.....................................................  44

PARK CITIES FINANCIAL STATEMENTS................................. F-1 thru F-29

                                                             Page ____ of ____.

                                      - 4 -
<PAGE>
 
                            BOK FINANCIAL CORPORATION
                            -------------------------

         BOK Financial Corporation ("BOK Financial") was incorporated by George
B. Kaiser ("Kaiser") under the laws of the State of Oklahoma on October 24, 1990
to acquire from the Federal Deposit Insurance Corporation (the "FDIC") the
equity interest of the FDIC in Bank of Oklahoma, National Association ("BOk").
On June 7, 1991, BOK Financial purchased from the FDIC 900,000 shares of BOk
Convertible Redeemable Adjustable Rate Preferred Stock ("BOK Preferred Stock")
and converted the BOK Preferred Stock into 99.99 percent of the outstanding BOk
Common Stock. Subsequently, in December, 1991, BOK Financial acquired the
remaining 00.01 percent of the outstanding BOk Common Stock pursuant to a
reorganization agreement with the former owner.

         Today, BOK Financial owns, directly or indirectly, all of the
outstanding capital stock of BOk, Citizens Bank of Northwest Arkansas, N.A.,
BancOklahoma Trust Company, BancOklahoma Mortgage Corp., BOK Capital Services
Corporation, BOSC, Inc., and Alliance Trust Company. BOK Financial is a bank
holding company under the Bank Holding Company Act of 1956. BOK Financial,
through it's subsidiaries, offers commercial banking services, correspondent
banking services, consumer banking services, investment securities and money
market services, mortgage banking, and trust and asset management services. BOK
Financial and its subsidiaries have approximately 1,800 full-time and 226
part-time employees at 65 locations in Oklahoma, four locations in Arkansas, and
two locations in Texas.

         The principal executive offices of BOK Financial are located at Bank of
Oklahoma Tower, Boston Avenue at Second Street, Tulsa, Oklahoma 74172, 
(918) 588-6000.

                          PARK CITIES BANCSHARES, INC.
                          ----------------------------

         Park Cities Bancshares, Inc. ("Park Cities") is located in University
Park (Dallas), Texas. Park Cities is a bank holding company under the Bank
Holding Company Act of 1956. Park Cities owns (indirectly through its
wholly-owned intermediate bank holding company subsidiary, Park Cities
Corporation) 99.925% of First National Bank of Park Cities, a national
association ("FNB Park Cities"). FNB Park Cities conducts its banking business
at two locations and a mobile branch in the Highland Park and University Park
areas of Dallas, Texas. Park Cities has approximately 62 employees.

         The principal executive offices of Park Cities are located at 6215
Hillcrest, Dallas, Texas 75205 and the telephone number is (214) 522-5858.

                        DESCRIPTION OF THE TRANSACTION
                        ------------------------------

         BOK Financial will acquire Park Cities. The transaction will be
consummated pursuant to an Agreement and Plan of Merger dated October 3, 1996
among BOK Financial, BOKF Merger Corporation Number Five ("BOKFSub"), and Park
Cities (the "Merger Agreement"). The Merger Agreement is Exhibit C to this
Prospectus. BOKFSub was formed solely for the

                                                              Page ____ of ____.

                                      - 5 -
<PAGE>
 
purpose of consummating the Merger. BOKFSub has engaged in no other business.
BOKFSub will be merged into Park Cities and Park Cities will be the surviving
bank holding company. Upon consummation of the Merger all outstanding options to
acquire Park Cities Common Stock will be exercised and there will be, after such
exercise, a total of 1,193,034 shares outstanding. The aggregate consideration
for all of the outstanding shares of Park Cities, after the exercise of the
outstanding options, is $51,978,000. In the Merger, each Park Cities shareholder
will receive, in exchange for the Park Cities Common Stock, (i) cash, (ii) a
BOKF Note, or (iii) a combination of cash and a BOKF Note equal to $43.5679 for
each share of Park Cities Common Stock. Upon consummation of the Merger, BOK
Financial will own all of the Park Cities Common Stock.

         Each BOKF Note will have a maturity date, selected by the Park Cities
shareholder, of not less than one, nor more than five years. Interest only, at
the Applicable Federal Rate under the Internal Revenue Code in effect on the
effective date of the Merger, will be paid quarterly. Principal will be paid at
the maturity date selected by the Park Cities shareholder. The BOKF Notes will
be unsecured. The form of the BOKF Notes is Exhibit A to this Prospectus. The
BOKF Notes will be issued pursuant to a trust indenture under the Trust
Indenture Act of 1939.  See TRUST INDENTURE.

         The Park Cities shareholders must make their election to receive a BOKF
Note at the time of the Park Cities Shareholders Meeting. If a shareholder does
not timely elect to receive a BOKF Note, the shareholder will be paid in cash
only. If a shareholder elects to receive a BOKF Note, but does not specify the
maturity, the maturity will be one year. Any Park Cities shareholder may rescind
the election to receive a BOKF Note by giving written notice to Park Cities not
later then twenty days prior to the consummation of the Merger. See ELECTION TO
RECEIVE BOKF NOTE.

         The Merger is subject to approval by the holders of two-thirds of the
issued and outstanding Park Cities Common Stock. A meeting of the Park Cities
shareholders will be held on February 7, 1997 to consider the Merger. As of
November 15, 1996, a total of 656,019 shares of the Park Cities Common Stock was
subject to a Shareholders Agreement pursuant to which the holders have agreed to
vote their shares in accordance with the vote of the holders of a majority of
the shares subject to the Shareholders Agreement. The directors and officers of
Park Cities together control approximately 55.4% of the shares subject to the
Shareholders Agreement and intend to vote to approve the Merger. Pursuant to the
Shareholders Agreement, Tom E. Turner, the Chairman and Chief Executive Officer 
of Park Cities, has an exclusive first right and option to purchase the Park 
Cities Common Stock which BOK Financial has offered to purchase, and if he 
elects not to exercise that option, the remaining members of the Control Group, 
have an option to purchase the Park Cities Common Stock. Mr. Turner has 
indicated he will not exercise his option and the Control Group in voting at the
Control Group Meeting to approve the Merger will also be voting to waive their 
option as well. See PARK CITIES SHAREHOLDERS MEETING.

         Park Cities shareholders will have dissenter's rights of appraisal
pursuant to the Texas Business Corporation Act. Shareholders who are part of the
Control Group may have their dissenter's rights limited by operation of the
Shareholders Agreement. The obligation of BOKF and BOKFSub to consummate the
Merger is subject to the condition precedent that not more than 20% of the Park
Cities shareholders dissent from the Merger. See APPRAISAL RIGHTS. Pursuant to
the Merger Agreement, Park Cities has agreed to conduct its business only in the
ordinary course of business pending consummation of the Merger and has made
usual and customary representations and warranties respecting the business and
financial affairs of Park Cities (including the warranty that no excess
parachute payments under Section 280G of the

                                                              Page ____ of ____.

                                      - 6 -
<PAGE>
 
Internal Revenue Code will be paid by Park Cities). The representations and
warranties are conditions precedent to the obligation of BOK Financial to
consummate the Merger, but do not survive the Merger. BOK Financial presently
knows of no condition precedent to its obligation to consummate the Merger which
has not been fulfilled.

         The approval of the Board of Governors of the Federal Reserve System
("Board") is required to consummate the Merger. The requisite application for
approval was filed with the Board on October 24, 1996. The application was
approved on January ____, 1997.

         The Merger was announced on October 3, 1996. The following comparative
market value information is presented as of October 3, 1996.

            Market Value        Market Value            Park Cities
         BOKF Common Stock      Park Cities      Equivalent Per Share Value/1/
         -----------------      -----------      --------------------------
 
               $23.75          None Available              $43.5679

         /1/  Determined on the amount of cash into which each share of Park
              Cities Common Stock will be converted.


                           PURPOSE OF THE TRANSACTION
                           --------------------------

Background of the Merger
- ------------------------

         The last several years have been a period of substantial and rapid
change in the financial services industry, characterized by regulatory change,
intensifying competition and consolidation. During this period, the management
and Board of Directors of Park Cities have reviewed various strategies and have
taken numerous steps to enhance shareholder value, including, increasing net
interest income, controlling expenses, maintaining asset quality and expanding
and refining the products offered to customers.

         As part of its review of strategic alternatives to enhancing
shareholder value, management and the Board of Directors of Park Cities, from
time to time, have considered the possible affiliation or sale of Park Cities
with a larger financial institution.

         In March, 1996, BOK Financial initially contacted Park Cities relating
to a possible transaction. At the time, Park Cities advised BOK Financial that
Park Cities would contact BOK Financial if Park Cities elected to consider any
transaction with BOK Financial. Informal meetings between representatives of
Park Cities and BOK Financial were held in April, 1996, but the parties did not
engage in any serious discussions with respect to any possible acquisition.

         On May 15, 1996, Park Cities engaged Keefe, Bruyette & Woods, Inc.
("KBW") to, among other things, assist in exploring ways to enhance shareholder
value, including studying Park Cities' acquisition value and identifying
potential acquirors in a competitive bidding process. KBW was authorized to
contact a limited number of qualified prospects to determine

                                                              Page ____ of ____.

                                     - 7 -
<PAGE>
 
their interest in a business combination with Park Cities. KBW prepared an
information brochure and contacted certain potential acquirors, including BOK
Financial to submit indications of interest to bid on Park Cities. Numerous
financial institutions expressed some interest in Park Cities. This process
resulted in three financial institutions performing due diligence at Park Cities
and two written offers being presented to the Park Cities Board of Directors,
including the proposal from BOK Financial described herein.

         KBW initially contacted BOK Financial in June, 1996 through a letter
inviting BOK Financial's participation in the purchase process. BOK Financial
also received and signed an agreement to keep confidential any nonpublic
information concerning Park Cities that BOK Financial may obtain during such
process. During August, 1996, BOK Financial evaluated the financial information
relating to Park Cities supplied by KBW. On September 3, 1996, BOK Financial
sent to Park Cities a draft of a preliminary nonbinding letter expressing its
indication of interest. On September 6, 1996 Park Cities Board of Directors met
to discuss the proposed transaction.

         The BOK Financial proposal offered consideration which Park Cities'
Board of Directors deemed more favorable than the other offer seriously
considered by Park Cities. The other offer proposed a cash only transaction (no
installment notes) and a merger of Park Cities with and into the acquiror.
Representatives of KBW informed the Board orally that, in their opinion: (i) an
acquisition of Park Cities in the present time frame at the price levels
indicated in the written indications of interest would be in the best economic
interests of Park Cities and its shareholders; (ii) based on numerous factors,
including the current price levels at which bank acquisition transactions were
currently being effected, the price proposed in the BOK Financial offer was more
favorable than the other offer; and (iii) the BOK Financial offer would be fair
to Park Cities and its shareholders from a financial point of view. Therefore,
Park Cities' Board determined that price being offered by BOK Financial along
with the other terms of BOK Financial's offer, including, but not limited to,
BOK Financial's intent to operate Park Cities as a separate autonomous entity
and to retain substantially all of Park Cities' employees, made it the more
advantageous offer, on balance.

         On September 6, 1996, Park Cities' Board of Directors authorized Park
Cities' management to negotiate a merger agreement with BOK Financial. The
parties then negotiated the Merger Agreement which was approved by the Park
Cities Board on October 1, 1996, and executed on October 3, 1996.

BOK Financial's Reasons for the Merger
- --------------------------------------

         The business strategy of BOK Financial is to establish itself, through
bank subsidiaries, as a significant banking competitor in every major market in
Oklahoma which offers attractive returns and in those areas of Arkansas, Kansas,
Missouri and Texas which border Oklahoma and which offer the opportunity for
operations compatible with the operations of BOk in Oklahoma. Park Cities
indirectly owns 99.925% of FNB Park Cities, located in Dallas, Texas. By
acquiring Park Cities, BOK Financial will acquire FNB Park Cities. BOK
Financial, through its Alliance Trust Company subsidiary with offices in Sherman
and Dallas, Texas, currently conducts a trust

                                                              Page ____ of ____.

                                      - 8 -
<PAGE>
 
business in the Dallas-Forth Worth Metroplex Area and in North Texas. The
acquisition of the FNB Park Cities is consistent with the business strategy of
BOK Financial.

Park Cities' Reasons for the Merger
- -----------------------------------

         In determining to accept the offer from BOK Financial and enter into
the Merger Agreement, Park Cities' Board of Directors considered a number of
factors, including the following: (i) the financial condition, operating results
and future prospects of BOK Financial and Park Cities; (ii) a comparison of the
price being paid in this Merger to other comparable bank mergers, based, among
other things, on multiples of book value and earnings; (iii) Park Cities'
alternatives to this Merger, including the written proposals of the other
institutions that had expressed an interest in an acquisition of Park Cities on
terms deemed less favorable than BOK Financial's proposal; (iv) the results of
KBW's efforts to elicit interest from other entities which might be interested
in a business combination transaction with Park Cities; (v) the financial
aspects of each written indication of interest; (vi) BOK Financial's intention
to permit the operation of Park Cities' existing offices as the First National
Bank of Park Cities after the Merger; (vii) Park Cities' view that consolidation
in the financial services industry is likely to continue; and (viii) the
relative lack of liquidity of Park Cities Common Stock.

         The Board noted that Park Cities, as part of a multi-state bank holding
company of greater size and resources, should be able to provide its customers
with a greater range of services and should become a stronger competitor in its
existing markets. The Board of Directors of Park Cities believes that the Merger
will result in a stronger and more effective competitor in Park Cities' markets,
better able to compete effectively in the rapidly changing marketplace for
banking and financial services and to take advantage of opportunities that might
not be available to Park Cities on its own. Park Cities' Board of Directors
believes that the Merger will provide Park Cities' customers with a broader
range of products and services, as well as greater convenience.

         The foregoing does not purport to be a complete list of the matters
considered by Park Cities' Board of Directors in approving the Merger. In
approving the Merger, the Board did not identify any one factor or group of
factors as being more significant than any other factor in the decision making
process. Individual directors, however, may have given one or more factors more
weight than other factors. The emphasis of the Board's discussion in considering
the transaction was on the financial aspects of the transaction, including the
consideration to be paid to Park Cities' shareholders in the Merger.

Recommendation of the Park Cities Board of Directors
- ----------------------------------------------------

         The Board of Directors of Park Cities believes that the terms of the
Merger are fair and in the best interests of Park Cities' shareholders and has
approved the Merger Agreement. The Board of Directors of Park Cities recommends
that the shareholders of Park Cities approve the Merger Agreement.

                                                              Page ____ of ____.

                                      - 9 -
<PAGE>
 
Opinion of Park Cities Financial Advisor
- ----------------------------------------

         Park Cities retained Keefe, Bruyette & Woods, Inc. to act as its
financial advisor and as such, among other things, to advise the Park Cities
Board of Directors as to Park Cities' "fair" sale value and the fairness to its
shareholders of the financial terms of the BOK Financial offer and other offers
to acquire Park Cities received from other financial institutions, and to
solicit indications of interest from selected potential acquirors of Park
Cities. The Park Cities Board of Directors retained KBW based upon its
experience and expertise. KBW, as part of its investment banking business,
regularly is engaged in the valuation of businesses and their securities in
connection with mergers and acquisitions and for other purposes. KBW has
knowledge of, and experience with banking markets and banking organizations
operating in markets across the nation, including Texas and the South and was
selected by Park Cities because of its knowledge of, experience with, and
reputation in the financial services industry.

         In such capacity, KBW participated in the negotiations with respect to
the pricing and other terms and conditions of the Merger, but the decision as to
which offer to accept was ultimately made by the Board of Director of Park
Cities. KBW advised the Park Cities Board of Directors that, in its opinion, as
of September 6, 1996, and as of October 1, 1996 the financial terms of BOK
Financial's offer are "fair" to Park Cities and its shareholders from a
financial point of view. On //__________, 1996, KBW delivered a written opinion
to the Park Cities Board as to the fairness of the transaction from a financial
point of view. No limitations were imposed by the Park Cities Board of Directors
upon KBW with respect to the investigations made or procedures followed by it in
arriving at its opinion.

         KBW analyzed certain comparable merger and acquisition transactions for
banking companies based upon the acquisition price relative to stated book
value, stated tangible book value, and the latest twelve months earnings. The
information analyzed was compiled by KBW from both internal sources and a data
firm that monitors and publishes transaction summaries and descriptions of
mergers and acquisitions in the financial services industry. The analysis
included a review and comparison of average and median acquisition price
multiples to stated tangible book value and trailing twelve month earnings per
share. The sample included, to the best of KBW's knowledge, all acquisitions of
Texas banking companies in metropolitan areas and rural areas announced during
1995 and 1996 in which the value of the consideration paid to the shareholders
of the acquired banks was $25 million or greater. KBW also performed a peer
group analysis of other independent, publicly traded Texas banks to demonstrate
the value that Park Cities would have if it were a publicly traded company and
did not sell to BOK Financial. KBW compared the present value of the future
stock prices which would accrue to a holder of shares of Park Cities's stock
assuming Park Cities were to remain independent to the Shareholder's Merger
Consideration. The present value of the stock price was determined by adding the
present value of the terminal value of the Park Cities's Common Stock at the end
of that period and discounting it back at a range of discount rates. Given these
analyses, KBW did not determine a valuation for Park Cities with a price per
share larger than the $43.57 being offered by BOK Financial.

         THE FAIRNESS OPINION RENDERED BY KBW IS AVAILABLE FOR INSPECTION
OR COPYING AT THE PRINCIPAL EXECUTIVE OFFICES OF PARK CITIES DURING

                                                              Page ____ of ____.

                                     - 10 -
<PAGE>
 
REGULAR BUSINESS HOURS BY ANY INTERESTED PARK CITIES SHAREHOLDER OR HIS OR HER
REPRESENTATIVE WHO HAS BEEN SO DESIGNATED IN WRITING.

         Pursuant to a letter agreement dated May 30, 1996 between KBW and Park
Cities, Park Cities paid KBW a $25,000 non-refundable advisory fee in July,
1996. For KBW's services in connection with the Merger, Park Cities agreed to
pay KBW a fee of $200,000 plus 6% of the aggregate consideration in excess of
$45 million received by Park Cities' shareholders. This fee is payable only upon
completion of the Merger. Based upon the Merger Consideration, KBW'S fee would
be approximately $618,680. The fee for the issuance of KBW's opinion is included
in this amount and the $25,000 in fees previously paid by Park Cities to KBW
will be credited against such amount. In addition, Park Cities has agreed to
reimburse KBW for its reasonable out-of-pocket costs and expenses incurred in
connection with the services rendered to Park Cities pursuant to its engagement.
Park Cities has agreed to indemnify KBW against certain liabilities, including
shareholder actions, incurred in connection with its services. The amount of all
of KBW's fees were determined by negotiation between Park Cities and KBW. KBW
has not had any material relationship with Park Cities or any of its affiliates
during the past two years other than the current engagement discussed above.

                                  RISK FACTORS
                                  ------------

         THE BOKF NOTES OFFERED BY THIS PROSPECTUS INVOLVE A RISK OF LOSS. In
determining whether to elect to receive a BOKF Note in lieu of cash, each Park
Cities shareholder should carefully consider, among other things, the following:

1.       BOKF Notes Unsecured
         --------------------

         The BOKF Notes are uninsured and unsecured general obligations of BOK
Financial and no reserve or sinking fund is being created to ensure payment of
the BOKF Notes. The BOKF Notes are not insured by the FDIC or any other entity.
In addition the BOKF Notes carry an interest rate fixed upon the effective date
of the Merger at the then prevailing Applicable Federal Rate, which are below
market rates of interest. The interest rate is fixed over the term of the BOKF
Note and thereby will not adjust to any increases in the Applicable Federal Rate
or interest rates generally. See ELECTION TO RECEIVE BOKF NOTE.

2.       Control of BOK Financial By Kaiser
         ----------------------------------

         George B. Kaiser owns approximately 76% of the BOK Financial Common
Stock and substantially all of the BOK Financial Series A Preferred Stock. Mr.
Kaiser is Chairman of the Board of BOK Financial. The future results of BOK
Financial will depend, in a significant way, on the management decisions of Mr.
Kaiser. Prior to June 7, 1991, when Mr. Kaiser acquired control of BOk, Mr.
Kaiser had not been a controlling shareholder or chief executive officer of a
bank or bank holding company and the principal business of Mr. Kaiser had been
the acquisition and disposition of oil and gas reserves and oil and gas
exploration and production. Mr. Kaiser will continue to devote a substantial
amount of his time and efforts to his oil and gas and other non-banking
businesses.

                                                              Page ____ of ____.

                                     - 11 -
<PAGE>
 
3.       Regional and National Economies
         -------------------------------

         BOK Financial is largely dependent on the Oklahoma regional economy.
The business of BOK Financial, by its nature, is subject to risks, particularly
in volatile economic times. The Oklahoma regional economy is affected by
national and international economic and political events. BOK Financial cannot
predict the future effect of such factors.

4.       Competition; Lending Risks
         --------------------------

         The banking industry in general, and in Texas and Oklahoma in
particular, is increasingly highly competitive. BOKF competes with significant
Oklahoma banks, major state and regional banks and other significant
institutions which provide financial services in BOKF's markets. BOKF is subject
to the competitive impact of state and federal legislation relating to the
geographic and product deregulation of the banking and financial services
industry. The risk of nonpayment (or deferred payment) of loans is inherent in
commercial banking. The historical focus upon Oklahoma in general and Tulsa and
Oklahoma City in particular makes BOKF dependent upon the economic conditions in
those areas. In recent months major consolidations of Oklahoma financial
institutions with national institutions has occurred. These consolidations will
likely make the banking business in Oklahoma even more competitive.

5.       Dependence on Key Personnel
         ---------------------------

         The business of BOK Financial is service-oriented and depends to a
large degree upon the services of key personnel. There can be no assurance of
the future ability of BOK Financial to attract and retain such services.

6.       Monetary Policy and Economic Conditions
         ---------------------------------------

         The operating and net income of BOK Financial will depend to a great
extent on net interest margins; that is, the difference between (i) the interest
rate the bank receives from earning assets such as loans and investment
securities and (ii) the interest rate paid on interest-bearing liabilities such
as deposits. In addition to the effect on net interest margins, changes in
interest rates affect the value of certain assets, such as available for sale
securities, loans held for sale and Capitalized Mortgage Servicing Rights.
Changes in the value of available for sale securities is reflected in
shareholders equity and declines in the value of loans held for sale and
Capitalized Mortgage Servicing Rights are reflected in operating and net income.
These rates are highly sensitive to many factors that are beyond the control of
BOK Financial, including general economic conditions and the policies of various
governmental and regulatory authorities.

7.       Government Regulation
         ---------------------

         The operations of BOK Financial are and will be affected by current and
future legislation and by the policies established from time to time by various
federal and state regulatory authorities. In particular, the monetary policies
of the Board of Governors of the Federal Reserve System have had a significant
effect on the operating results of commercial banks in the past and are expected
to continue to do so in the future. Among the instruments

                                                              Page ____ of ____.

                                     - 12 -
<PAGE>
 
of monetary policy used by the Board to implement its objectives are changes in
the federal funds rate charged on bank borrowings and changes in the reserve
requirements on bank deposits. It is not possible to predict what changes, if
any, will be made to the monetary policies of the Board or to existing federal
and state legislation or the effect that such changes may have on the future
business and earnings prospects of BOK Financial.

8.       BOK Financial Dependence on Bank Subsidiaries
         ---------------------------------------------

         Substantially all of BOK Financial's earnings are attributable to
operations of its two banking subsidiaries, Bank of Oklahoma, National
Association and Citizens Bank of Northwest Arkansas, National Association. The
ability of these bank subsidiaries to pay dividends to BOK Financial is subject
to statutory and regulatory constraints respecting the payment of dividends by
banks and requiring the maintenance by banks of specified capital levels.

         These and other factors subject the BOKF Notes to a risk of loss.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
                 -----------------------------------------------

         BOK Financial incorporates by reference the following documents
heretofore filed with the Commission pursuant to the Exchange Act:

         (1)    Annual Report of BOK Financial on Form 10-K for the fiscal year
                ended December 31, 1995.

         (2)    Quarterly Reports of BOK Financial on Form 10-Q for the fiscal
                quarter ended September 30, 1996.

         (3)    Item 6 (Selected Financial Data; Table 1 - Consolidated Selected
                Financial Data, page 5, 1995 Annual Report to Shareholders);
                Item 7 (Management's Discussion and Analysis of Financial
                Condition and Results of Operations, pages 6 through 20; Item 8
                (Financial Statements and Supplementary Data, Table 5 - Selected
                Quarterly Financial Data, page 11, 1995 Annual Report to
                Shareholders); Annual Financial Summary-Unaudited, pages 44 and
                45; and Quarterly Financial Summary-Unaudited, pages 46 and 47,
                1995 Annual Report to Shareholders); Item 10 (Directors and
                Executive Officers of the Registrant, pages 3 through 5 and 10
                and 11 of BOK Financial 1996 Annual Proxy Statement); Item 11
                (Executive Compensation pages 12 through 15 of BOK Financial
                1996 Annual Proxy Statement); Item 12 (Security Ownership of
                Certain Beneficial Owners and Management, pages 6 through 9, BOK
                Financial 1996 Annual Proxy Statement); and Item 13 (Certain
                Relationships and Related Transactions, page 17, BOK Financial
                1996 Annual Proxy Statement).


                                                              Page ____ of ____.

                                     - 13 -
<PAGE>
 
         (4)    Part I (Financial Information, pages 1 through 28) of BOK
                Financial Quarterly Report on Form 10-Q for the Three Month
                Fiscal Period ended September 30, 1996.

         All documents filed by BOK Financial pursuant to Section 13(a), 13(c),
14 or 15(d) of the Exchange Act subsequent to the date of this Prospectus and
prior to the consummation of the Merger shall be deemed to be incorporated by
reference in this Prospectus and to be a part hereof from the date of filing of
such documents.

                       DELIVERY OF BOKF 1995 ANNUAL REPORT
                     AND THIRD QUARTER 1996 QUARTERLY REPORT
                     ---------------------------------------

         BOK Financial is delivering with this Prospectus to each shareholder of
Park Cities a copy of the BOK Financial 1995 Annual Report, the BOK Financial
Quarterly Report on Securities and Exchange Commission Form 10-Q for the fiscal
quarter ended September 30, 1996, and the BOK Financial Proxy Statement for the
1996 Annual Meeting of Shareholders.

                 SELECTED COMPARATIVE PER SHARE DATA (Unaudited)
                 -----------------------------------------------

         The following presents comparative historical, pro forma, and pro forma
equivalent unaudited fully diluted per share data for BOK Financial and Park
Cities. The pro forma data assumes that this acquisition was effective on the
first day of the applicable periods presented. Park Cities equivalent pro forma
data are not applicable since there is no corresponding exchange ratio for BOK
Financial shares. The data presented should be read in conjunction with the
historical financial statements and notes thereto included herein or
incorporated by reference.

<TABLE>
<CAPTION>

                                                      Nine Months Ended                    Year Ended
                                                      September 30, 1996                December 31, 1995
                                                      ------------------                -----------------
                                                  Original        Restated(1)       Original        Restated(2)
                                                  --------        -----------       --------        -----------
<S>                                               <C>             <C>               <C>             <C> 
Income from Continuing Operations
  per Fully Diluted Common Share:

  Historical:
    BOK Financial                                  $ 1.69           $ 1.64           $ 2.12            $ 2.05
    Park Cities                                      2.21             2.21             2.42              2.20
  Pro Forma combined per
    BOK Financial share                              1.67             1.63             2.06              1.99
  Equivalent pro forma per
    Park Cities share                                 N/A              N/A              N/A               N/A
</TABLE>

Dividends per Fully Diluted Common Share:

  Neither BOK Financial nor Park Cities have paid cash dividends on common
    shares during the applicable periods, except cash paid by Park Cities in
    lieu of Fractional Shares.

                                                              Page ____ of ____.

                                     - 14 -
<PAGE>
 
Book Value per Fully Diluted Common Share (Period End):

<TABLE>
<CAPTION>
                                                      Nine Months Ended                    Year Ended
                                                      September 30, 1996                December 31, 1995
                                                      ------------------                -----------------
                                                  Original         Restated (1)     Original      Restated (2)
                                                  --------         ------------     --------      ------------
   <S>                                            <C>              <C>              <C>           <C> 
   Historical:
     BOK Financial                                 $ 15.51          $ 15.06          $ 14.02         $ 13.61
     Park Cities                                     19.37            19.37            18.64           16.95
   Pro Forma combined per
     BOK Financial share                             15.51            15.06            14.02           13.61
   Equivalent pro forma per
     Park Cities share                                N/A              N/A              N/A             N/A
</TABLE>

(1) -  Restated for the effects of a 3% common stock dividend declared by BOK
       Financial on October 29, 1996.

(2) -  Restated for the effects of a 3% common stock dividend declared by BOK
       Financial on October 29, 1996 and a 10% common stock dividend by Park
       Cities on June 30, 1996.

                  PRO FORMA COMBINED SELECTED FINANCIAL DATA
                           BOK Financial Corporation
                     (In Thousands, Except Per Share Data)

<TABLE>
<CAPTION>
                                         Nine Months Ended                    Year Ended
                                         September 30, 1996                December 31, 1995
                                         ------------------                -----------------
<S>                                      <C>                               <C> 
Summarized income statement:
  Net interest revenue                        $   99,053                        $  119,396
  Provision for loan losses                        3,950                               241
  Net income                                      39,121                            47,798

Per fully diluted common share
  Net income (1)                                    1.63                              1.99
  Cash dividends                                       -                                 -
  Book value (period end) (1)                      15.06                             13.61

(1) -  Restated for the effects of a 3% common stock dividend declared by BOK Financial on October 29, 1996.

Financial position:
  Loans, net of reserve                        2,349,982                         2,226,597
  Assets                                       4,691,833                         4,449,018
  Deposits                                     3,423,142                         3,132,744
  Shareholders' equity                           333,177                           301,565

Capital ratios (period end):
  Shareholders' equity to total asset              7.10%                             6.78%
  Tier 1 capital to risk weighted assets           9.07%                             8.48%
  Total capital to risk weighted assets           10.29%                             9.70%
  Tier 1 capital to average assets                 6.33%                             5.47%
</TABLE> 


                                                              Page ____ of ____.

                                     - 15 -
<PAGE>
 
                               BOKF COMMON STOCK
                             MARKET AND DIVIDENDS
                             --------------------
 
         As of October 1, 1996, BOK Financial had 1,149 shareholders of record.
The BOKF Common Stock is traded on the facilities of NASDAQ under the trading
symbol "BOKF". BOKF Common Stock quarterly high and low bid information follows:

<TABLE> 
<CAPTION> 
                                              First      Second       Third      Fourth
                                              -----      ------       -----      ------
       <S>                                   <C>         <C>         <C>         <C> 
       1996:   Low                           $ 19.25     $ 20.00     $ 21.25
               High                          $ 23.25     $ 20.50     $ 23.00
                                 
       1995:   Low                           $ 19.75     $ 20.25     $ 21.50     $ 19.00
               High                            22.25       22.75       25.25       24.50
                                 
       1994:   Low                           $ 20.25     $ 19.00     $ 19.00     $ 19.25
               High                            25.50       21.50       22.00       20.50
</TABLE> 

         No dividends have been paid on BOK Financial Common Stock except (i) on
November 18, 1993, the Company paid a 3% dividend on BOK Financial Common Stock
outstanding as of November 9, 1993 payable in kind by the issuance of BOK
Financial Stock, (ii) on November 17, 1994, the Company paid a 3% dividend on
BOK Financial Common Stock outstanding as of November 8, 1994 payable in kind by
the issuance of BOK Financial Common Stock, (iii) on November 27, 1995, the
Company paid a 3% dividend on BOK Financial Common Stock outstanding as of
November 17, 1995 payable in kind by the issuance of BOK Financial Common Stock;
and, (iv) on October 29, 1996, BOK Financial declared a 3% dividend payable in
kind by the issuance of BOK Financial Common Stock on or about November 28, 1996
to BOKF shareholders of record as of November 17, 1996.

         At November 5, 1996, the closing price of BOKF Common Stock on NASDAQ
was $25.50.

                            PARK CITIES COMMON STOCK
                            ------------------------

         At November 15, 1996, there were 203 shareholders of Park Cities Common
Stock and 921,348 outstanding shares. There is no established public trading
market for the Common Stock of Park Cities. Park Cities has outstanding stock
options, granted pursuant to an employee stock option plan, representing the
right to acquire an aggregate of 271,686 shares of Park Cities Common Stock. The
options will be exercised on or before the consummation of the Merger.

                        PARK CITIES SHAREHOLDERS MEETING

                      (For Purpose of Approving The Merger)
                      -------------------------------------

         The Meetings. There will be a meeting (the "Control Group Meeting") of
those shareholders (the "Control Group") of Park Cities who are party to the
Shareholders Agreement dated May 6, 1991 (the "Shareholders Agreement") at the
University Park City Hall Auditorium,

                                                              Page ____ of ____.

                                     - 16 -
<PAGE>
 
3800 University Boulevard, University Park, Texas 75205, commencing at 10:00
a.m. on February 7, 1997. After completion of such meeting, at 10:30 a.m., a
Special Meeting of Shareholders of Park Cities will be held at the same location
(the "Special Meeting"). The purpose of the Control Group Meeting and the
Special Meeting will be to vote upon the approval of the Merger and any other
business or on other matters.

         The Shareholders Agreement. Under the terms of the Shareholders
Agreement, the Control Group votes as a block on those matters presented for a
vote of the shareholders of the Park Cities. If all of the shareholders
comprising the Control Group do not agree upon how to cast their votes, all such
shareholders are nevertheless required to cast their votes in accordance with
the votes cast by the holders of a majority of the shares subject to the
Shareholders Agreement. Shareholders whose shares are subject to the
Shareholders Agreement may attend the Control Group Meeting, or alternatively,
sign and return a Proxy indicating how such shareholder wishes to vote at the
meeting. A total of 656,019 shares of Park Cities Common Stock are subject to
the Shareholders Agreement. The Officers and Directors of Park Cities own
363,686 shares, or 55.4% of the shares subject to the Shareholders Agreement, as
hereafter discussed. Pursuant to the Shareholders Agreement, Tom E. Turner, the 
Chairman and Chief Executive Officer of Park Cities, has an exclusive first 
right and option to purchase the Park Cities Common Stock which BOK Financial 
has offered to purchase, and if he elects not to exercise that option, the 
remaining members of the Control Group, have an option to purchase the Park 
Cities Common Stock. Mr. Turner has indicated he will not exercise his option 
and the Control Group in voting at the Control Group Meeting to approve the 
Merger will also be voting to waive their option as well.

         Principal Shareholders and Management Ownership. The Board of Directors
and the officers of Park Cities together control approximately 427,287 shares of
Park Cities Common Stock, or approximately 46.4% of the voting power of the
Company (excluding options to purchase 271,686 shares of Common Stock which are
presently exercisable, which have not been exercised, but which will be
exercised in connection with the Merger). A total of 363,686 of these shares are
subject to the Shareholders Agreement, which covers 656,019 shares held by 79
shareholders. All but one of the directors of Park Cities are subject to the
Shareholders Agreement. The Board of Directors has approved the Merger Agreement
and recommended it to the Park Cities Shareholders and intend to vote for the
Merger. See PARK CITIES BOARD OF DIRECTORS.

         The Proxies. Delivered to each Park Cities shareholder with this
Prospectus is a form of Proxy solicited on behalf of the Board of Directors of
Park Cities to solicit proxies (the "Proxies") for the Control Group Meeting and
for the Special Meeting. All shares of Park Cities Common Stock represented by
valid Proxies, unless the shareholder otherwise specifies, will be voted (i) FOR
approval of the Merger and (ii) at the discretion of the Proxy holders with
regard to any other matter that may properly come before the Meeting or any
adjournments thereof.

         Where a shareholder has appropriately specified how a Proxy is to be
voted, it will be voted accordingly. The Proxy may be revoked at any time prior
to the date of the Meetings by providing written notice of such revocation to
Park Cities. If notice of revocation is not received by the date of the
Meetings, a shareholder may nevertheless revoke a Proxy if he or she attends the
Meeting and desires to vote in person. If a shareholder executes two or more
valid Proxies, the Proxy bearing the most recent date will be honored. The cost
of this solicitation of Proxies will be borne by Park Cities.

         The Record Date and Park Cities Voting Securities. The record date for
determining the shareholders entitled to notice of and to vote at the Special
Meeting or any adjournments


                                                              Page ____ of ____.

                                     - 17 -
<PAGE>
 
thereof is the close of business on January 13, 1997 (the "Record Date"), at
which time Park Cities had issued and outstanding 921,348 shares of Common
Stock, par value $5.00 per share (the "Common Stock"). Common Stock is the only
class of outstanding securities of the Company entitled to vote at the Meeting.

         Quorum and Voting. The presence at the Special Meeting, in person or by
proxy, of the holders of one-third or more of the outstanding shares of Park
Cities Common Stock is necessary to constitute a quorum to convene the Special
Meeting and to conduct any other business which may properly come before the
Special Meeting. The affirmative vote of at least two-thirds of all issued and
outstanding Park Cities Common Stock is required to approve the Merger. Park
Cities shareholders as of the Record Date are entitled to one vote for each
share held.

         As soon as practicable after consummation of the Merger, an individual
who is an existing member of the Board of Directors of Park Cities will be
selected by the mutual agreement of the Board of Directors of Park Cities and
BOK Financial to serve as a member of the Board of Directors of BOK Financial
for at least so long as any of the BOKF Notes remain unpaid.

                         ELECTION TO RECEIVE BOKF NOTE
                         -----------------------------

         Each Park Cities shareholder may, in the manner hereafter described,
elect to receive some or all of the consideration due the shareholder upon
consummation of the Merger (the "Shareholder's Merger Consideration") in the
form of a BOKF Note. The BOKF Note will have a maturity date, selected by the
shareholder, of not less than one, nor more than five, years after consummation
of the Merger. The BOKF Notes will bear interest at the Applicable Federal Rate
in effect on the effective date of the Merger. Interest will be paid quarterly.
The principal amount of the BOKF Notes will be paid only at maturity. The BOKF
Notes will be uninsured and unsecured general obligations of BOK Financial.
There is no market for the BOKF Notes and none will be established. The BOKF
Notes will be registered on the financial records of BOK Financial and will be
transferable only by surrender to BOK Financial and reissue to the proposed
transferee. The form of the BOKF Notes is set forth in Exhibit A attached to
this Prospectus and Proxy Statement.

         For October, 1996, the Applicable Federal Rate was 5.94% for a maturity
of one, two or three years and 6.56% for a maturity of four or five years. The
Applicable Federal Rate changes from month to month and the actual interest rate
of the BOKF Notes will be the Applicable Federal Rate as in effect on the
effective date of the Merger.

         The election to receive part or all of the Shareholder's Merger
Consideration in the form of a BOKF Note must be made at the time of the Special
Meeting of Park Cities Shareholders to be held February 7, 1997. See PARK CITIES
SHAREHOLDERS MEETING. To the extent a Park Cities Shareholder does not timely
elect to receive a BOKF Note, the Shareholder's Merger Consideration will be
paid in cash. If a Park Cities shareholder does not specify a maturity for the
BOKF Note, the maturity date will be deemed to be one year after consummation of
the Merger.

                                                              Page ____ of ____.

                                     - 18 -
<PAGE>
 
         Each Park Cities shareholder desiring to receive a BOKF Note for all or
part of the Shareholder's Merger Consideration must make the election to receive
a BOKF Note using the form of Proxy and Election delivered to the shareholder
with this Prospectus and Proxy Statement, whether or not the shareholder grants
a proxy. Each Park Cities shareholder may rescind the election to receive a BOKF
Note by giving written notice to Park Cities not later than twenty days before
the consummation of the Merger. The Merger is expected to be consummated on or
shortly after February 12, 1997, but the actual consummation date may be sooner
or later. Park Cities shareholders will not receive notice of the actual
consummation date.

         The federal income tax consequences of electing to receive a BOKF Note
are discussed in FEDERAL INCOME TAX CONSEQUENCES, to which reference is hereby
made. Each Park Cities shareholder should consult her or his tax adviser in
making the decision whether to elect to receive a BOKF Note and, if so electing,
which maturity date should be selected.

         At the consummation, BOK Financial will deliver the total Shareholder's
Merger Consideration for all Park Cities shareholders to Bank of New York who
will serve as Payment Agent (herein so called). Following consummation of the
Merger, the Payment Agent will deliver instructions to Park Cities Shareholders
concerning the manner in which to tender certificates representing Park Cities
Common Stock for cash and/or the BOKF Note. Park Cities shareholders should NOT
tender certificates until notice is received from the Payment Agent. The BOKF
Notes will be dated as of the consummation date. The cash portion of the
Shareholder's Merger Consideration will be paid without interest.

                        FEDERAL INCOME TAX CONSEQUENCES
                        -------------------------------

        The following is a general summary of a limited number of federal
income tax considerations relevant to the Merger and the issuance of the BOKF
Notes. This summary generally does not address state, local, or foreign tax
considerations, nor tax considerations relevant only to particular categories of
taxpayers (including non-U.S. investors). No ruling has been requested from the
IRS and no opinion of counsel has been requested concerning any of the matters
discussed in this summary. The statements concerning federal income tax
consequences are based upon the Internal Revenue Code, applicable Treasury
regulations thereunder, reported judicial decisions, and reported administrative
rulings. Additionally, the tax laws and other authorities upon which this
summary is based could change (possibly, retroactively) after the date of this
Prospectus. Accordingly, Park Cities shareholders should consult their tax
advisors as to the federal income and all other tax consequences of the
prospective Merger and issuance of the BOKF Notes.

         Consummation of the Merger will constitute a taxable sale of each Park
Cities shareholder's Common Stock. Each Park Cities shareholder will realize (i)
a capital gain measured by the excess of the total Shareholder's Merger
Consideration received by such shareholder over the shareholder's adjusted tax
basis in the stock or (ii) a capital loss measured by the excess of the
shareholder's adjusted tax basis over the total Shareholder's Merger
Consideration received by the shareholder.

                                                              Page ____ of ____.

                                     - 19 -
<PAGE>
 
         If a shareholder elects to receive a BOKF Note, the shareholder's
recognition of gain may be deferred by reporting the gain on the installment
method under Section 453 of the Internal Revenue Code. Under the installment
method, a shareholder will generally recognize gain during each taxable year
equal to the product of (i) the amount of cash received (other than interest
payments), if any, multiplied by (ii) the "gross profit percentage". The
shareholder's "gross profit percentage" will generally be equal to the product
of (i) the total gain to be recognized by the shareholder, divided by (ii) the
total consideration the shareholder received for the Park Cities Common Stock.

         Each Park Cities shareholder will be required to report gain using the
installment method unless the shareholder expressly elects to report all of the
gain in the year of sale. Certain transactions can accelerate the recognition of
gain under the installment sale method, including any disposition or pledge of
the BOKF Note or grant of a security interest therein.

         Additionally, a shareholder must pay interest on the deferred tax
liability to the extent that the shareholder holds installment obligations with
an aggregate face amount in excess of $5 million and that arose during and are
outstanding as of the close of the taxable year. If applicable, the shareholder
must continue to pay interest on the deferred tax liability for each subsequent
taxable year in which an amount of the installment obligation remains
outstanding.

         A shareholder's capital gain or loss will be long term if the stock has
been held more than one year, otherwise the gain or loss will be short term.
Currently, for individual taxpayers, net long term capital gains reduced by net
short term capital losses are taxed at a maximum 28% federal income tax rate.
Net short term capital gains are taxed at the same rate as ordinary income. An
individual may deduct only $3,000 of net capital losses (net of capital gains)
per year.

         EACH PARK CITIES SHAREHOLDER IS ENCOURAGED TO CONSULT WITH HER OR HIS
TAX ADVISOR RESPECTING THE EFFECT OF THE MERGER AND ANY ELECTION TO RECEIVE A
BOKF NOTE ON SUCH SHAREHOLDER.

               BOK FINANCIAL RATIO OF EARNINGS TO FIXED CHARGES
               ------------------------------------------------

<TABLE> 
<CAPTION> 
                                          For the Nine Months                          For the Year Ended
                                          Ended Sept. 30, 1996                              December 31
                                          --------------------     -------------------------------------------------------
                                                                   1995        1994         1993         1992         1991
                                                                   ----        ----         ----         ----         ----
<S>                                       <C>                      <C>         <C>          <C>          <C>          <C> 
Ratio of Earnings to Fixed Charges:                             
                                                                
     Excluding Interest on Deposits            2.50                  2.02         2.81        6.80         7.63         5.41
     Including Interest on Deposits            1.40                  1.40         1.57        1.73         1.61         1.31
==============================================================================================================================

</TABLE> 

                                                              Page ____ of ____.

                                     - 20 -
<PAGE>
 
                                TRUST INDENTURE
                                ---------------

         The BOKF Notes will be issued pursuant to a trust indenture agreement
(the "Indenture"). The Indenture is Exhibit D to this Prospectus. Bank of New
York is the Indenture trustee ("Trustee"). The Indenture imposes upon the
Trustee of BOKF the rights and obligations required by the provisions of the
Trust Indenture Act of 1939. In particular, the Indenture requires the Trustee
to give notice of any default to the holders of the BOKF Notes and permits the
Trustee to recover judgment, in its own name, upon default by BOKF, for the
benefit of the holders of BOKF Notes.

         The BOKF Notes are uninsured and unsecured general obligations of BOK
Financial and no reserve or sinking fund is being created to ensure payment of
the BOKF Notes. The BOKF Notes are not insured by the FDIC or any other entity.
An event of default exists under the BOKF Notes if BOKF fails to timely pay
interest or principal, if BOKF executes an assignment for the benefit of its
creditors or takes other similar actions set forth in the Notes, or, if there is
a change in control of BOKF, as defined in the Note. The form of the BOKF Notes
is Exhibit A to this Prospectus and Proxy Statement.

         The address of the Trustee is Bank of New York, Attention: Corporate
Trust, 101 Barclay Street 12W, New York, New York 10286, Attention: Byron Merino
(212-815-6285).

                               APPRAISAL RIGHTS
                               ----------------

General
- -------

         Articles 5.11, 5.12 and 5.13 of the Texas Business Corporation Act
("TBCA") grants the holders of Park Cities Common Stock the right to vote
against and dissent from the proposed Merger and seek payment for the fair value
(prior to giving effect to the Merger) of their Park Cities Common Stock if the
Merger is approved. A copy of Articles 5.11, 5.12 and 5.13 of the TBCA is
attached hereto as Exhibit B. EACH SHAREHOLDER OF PARK CITIES IS ADVISED TO READ
ARTICLES 5.11, 5.12 and 5.13 CAREFULLY AND SEEK THE ADVICE OF COUNSEL IF SUCH
SHAREHOLDER DESIRES TO DISSENT TO THE PROPOSED MERGER. FAILURE TO FOLLOW ANY OF
THE STATUTORY PROCEDURES WILL RESULT IN A TERMINATION OR WAIVER OF APPRAISAL
RIGHTS. Articles 5.11, 5.12 and 5.13 constitute the exclusive remedy for the
recovery of the value of shares held by shareholders who do not agree with the
Merger, so failure to properly follow the proscribed procedures will result in
such shareholder being precluded from further action regarding the Merger. The
following summary of Articles 5.11, 5.12 and 5.13 is intended only as a brief
general discussion of certain of its provisions and is qualified in its entirety
by reference to the detailed provisions set forth in Articles 5.11, 5.12 and
5.13 and attached hereto as Exhibit B.


                                                              Page ____ of ____.

                                     - 21 -
<PAGE>
 
Shareholders Entitled to Dissent
- --------------------------------

         The shareholders of Park Cities entitled to vote on the Merger are
entitled to dissent under Articles 5.11, 5.12 and 5.13. thus, each holder of
Park Cities Common Stock is entitled to dissent. The Shareholders Agreement may
limit the right on any shareholder who is a party to the Shareholders Agreement
to dissent. See APPRAISAL RIGHTS - EFFECT OF SHAREHOLDERS AGREEMENT

Rights of Dissent
- -----------------

         If a shareholder properly exercises the right to dissent, such
shareholder has the right to receive payment of the fair value of such
shareholder's Park Cities Common Stock rather than accepting the Shareholder's
Merger Consideration (cash or BOKF Notes). "Fair value" under Article 5.12 means
the value of the shares as of the day before the Park Cities Special Meeting,
excluding any appreciation or depreciation in anticipation of the Merger.

Initial Demand by Shareholder
- -----------------------------

         A shareholder wishing to assert dissenters' rights must (i) deliver to
Park Cities, before the vote on the Merger is taken at the Park Cities Special
             ------
Meeting, written objection to the proposed Merger (it is not enough to merely
vote against the Merger, the written objection must be delivered to Park Cities)
setting out that the shareholder's right to dissent will be exercised if the
Merger is approved and providing the shareholder's address to which notice
thereof shall be mailed in the event the Merger is approved, and (ii) not vote
for the Merger. It is not necessary to vote against the Merger to preserve
dissenters' appraisal rights (and therefore persons who abstain from voting may
exercise their dissenters' appraisal rights), but a shareholder cannot vote in
favor of the Merger and preserve such rights.

Subsequent Notice by Park Cities upon Approval of Merger
- --------------------------------------------------------

         Within 10 days after the Merger is approved, Park Cities must deliver a
written notice (the "Approval Notice") to each Park Cities shareholder who
properly and timely delivered an objection to the Merger before the Park Cities
Special Meeting and did not vote for the Merger ("Dissenting Stockholders")
                ---    
advising each Dissenting Stockholder that the Merger was approved.

Payment Demand by Dissenting Stockholders
- -----------------------------------------

         Dissenting Stockholders who have received an Approval Notice must
deliver a written payment demand ("Payment Demand") to Park Cities within 10
days after delivery of the Approval Notice by Park Cities, making written demand
for payment of the fair value of such Dissenting Stockholder's shares of Park
Cities Common Stock as of the day before the Park Cities Special Meeting. The
Payment Demand must set forth the number and class of shares owned by, and the
fair value of such shares as estimated by, the Dissenting Stockholder. Within 20
days after submitting the Payment Demand, the Dissenting Stockholder must also
submit his, her or its shares of Park Cities Common Stock to Park Cities for
notation on the certificates representing such shares that such demand has been
made. Failure to timely deliver the Payment

                                                              Page ____ of ____.

                                    - 22 -
<PAGE>
 
Demand or submit the certificates for notation will preclude the Dissenting
Stockholder from receiving payment of the fair value of the Dissenting
Stockholder's shares under Articles 5.12 and 5.13 and such Dissenting
Stockholder will receive instead the Shareholder's Merger Consideration. Upon
delivery of a Payment Demand to Park Cities, the Dissenting Stockholder shall
cease to have any rights as a stockholder except the rights accorded by Articles
5.11, 5.12 and 5.13.

Park Cities Response to Payment Demand
- --------------------------------------

         After receipt of a Payment Demand, Park Cities must, within 20 days
after receipt of the Payment Demand, deliver written notice (the "Response
Notice") to the Dissenting Stockholder, either (i) accepting the amount claimed
and agreeing to pay that amount within 90 days after the Park Cities Special
Meeting, upon surrender of the share certificates by the Dissenting Stockholder,
or (ii) setting forth Park Cities' estimate of the fair value of the shares and
agreeing to pay that amount within such 90 day period provided Park Cities, upon
surrender of the share certificates by the Dissenting Stockholder, receives
written notice of acceptance from the Dissenting Stockholder within 60 days
after the Park Cities Special Meeting agreeing to the value estimated by Park
Cities.

Suit upon Failure to Agree on Fair Value
- ----------------------------------------

         If the Dissenting Stockholder and Park Cities have not agreed on the
fair value of the Dissenting Stockholder's shares within 60 days after the Park
Cities Special Meeting, then either Park Cities or the Dissenting Stockholder
may file suit for a judicial determination of the fair value of the shares. See
Article 5.12 for the procedures to be followed for judicial appraisal.

Exclusive Remedy
- ----------------

         In the absence of fraud in the transaction, the remedy provided by
Articles 5.11, 5.12 and 5.13 is the exclusive remedy for the recovery of the
value of Dissenting Stockholders' shares or money damages with respect to the
Merger, and any Park Cities stockholder failing to comply with the requirements
of Articles 5.11, 5.12 and 5.13 will not be entitled to bring suit for the
recovery of the value of such shares or money damages, provided Park Cities
complied with the requirements of Articles 5.11, 5.12 and 5.13.

Effect of Shareholders Agreement
- --------------------------------

         A number of shareholders of Park Cities, representing in excess of
two-thirds of the voting shares of Park Cities Common Stock, are a party to the
Shareholders Agreement. The Shareholders Agreement contains a voting agreement
provision whereby the Control Group agree that their shares will be voted as a
block on those matters requiring votes of the shareholders of Park Cities. The
owners of a majority of the shares of the Control Group shall determine how all
the shares of the Control Group shall be voted, pursuant to an irrevocable
proxy. Thus, a vote in favor of the Merger by a majority of the voting Group
shares would result in the affirmative vote of all the Control Group shares,
which is more than the statutorily required two-thirds needed to approve the
Merger. Also, a shareholder in the Control Group who wishes to
              ------------------------------------------------


                                                              Page ____ of ____.

                                     - 23 -
<PAGE>
 
dissent will be deemed to have waived her or his appraisal rights if, based upon
- --------------------------------------------------------------------------------
the vote of the majority of the Control Group, the Control Group proxy votes in
- -------------------------------------------------------------------------------
favor of the Merger.
- -------------------

                        PARK CITIES BOARD OF DIRECTORS
                        ------------------------------

         The board of directors of Park Cities consists of eighteen members,
including three advisory directors.

         C. Thomas Abbott. Mr. Abbott was elected President and director of FNB
Park Cities in September 1988 and of Park Cities in May 1991. Prior to that he
was Vice Chairman of NorthPark National Bank from July 1986 to July 1988, and
from October 1977 to July 1986 was President and Chief Executive Officer of
NorthPark National Bank. He was President of NorthPark National Corporation from
1981 to July 1988.

         Charles A. Angel, Jr. Mr. Angel became Vice Chairman and director of
Park Cities and FNB Park Cities in May 1992. Prior to that he was Chairman of
the Preston Office of Team Bank from 1988 to 1992. Earlier he was President,
Vice Chairman and Chairman of Preston State Bank and its acquirors from 1970 to
1988.

         Webber W. Beall, Jr. Mr. Beall was elected a director of FNB Park
Cities in July 1984 and of Park Cities in May 1991. He has been an attorney with
the law firm of Touchstone, Bernays, Johnston, Beall and Smith since 1959 and a
partner since 1965.

         C. Huston Bell. Mr. Bell was elected a director of Park Cities and FNB
Park Cities in November 1991. He has been President of The Vantage Companies, a
real estate development firm, since 1981.

         Edward O. Boshell, Jr. (Advisory Director). Mr. Boshell was elected an
advisory director of Park Cities and FNB Park Cities in February 1993. Until his
retirement, Mr. Boshell was President of Columbia General Corporation, a
distributor of industrial supplies, and an entrepreneur. Related business
interests include EOB Investments, LLC and Columbia General Investment, LP.

         Ben R. Briggs. Mr. Briggs was elected a director of FNB Park Cities in
July 1986 and of Park Cities in May 1991. Until his retirement in 1991, he was
the owner of Ben R. Briggs Realtors, Inc., a real estate brokerage and
investment firm.

         R. Neal Bright. Mr. Bright was elected a director of Park Cities and
FNB Park Cities in May 1991. He has been managing partner of the accounting firm
of Bright & Bright since 1985.

         Edward F. Doran. Mr. Doran was elected a director of FNB Park Cities in
July 1984. He served as advisory director of FNB Park Cities from January 1987
until October 1989 when he was once again elected a director, and he has been a
director of Park Cities since May 1991. He has been President of Doran
Chevrolet, Inc. since 1956.


                                                              Page ____ of ____.

                                     - 24 -
<PAGE>
 
         James J. Ellis. Mr. Ellis was elected a director of Park Cities and FNB
Park Cities in April 1993. He served as General Manager of the Dallas Agency of
Mutual of New York from 1976 until his retirement from that position in January
1992. He is currently involved in management of personal investments and his
individual insurance practice.

         R. William Gribble, Jr. Mr. Gribble was elected a director of FNB Park
Cities in July 1984 and of Park Cities in May 1991. He has been owner of Gribble
Oil Corporation, an oil and gas exploration and production company, since 1978.

         J.T. Hairston, Jr. Mr. Hairston was elected a director of FNB Park
Cities in October 1989 and of Park Cities in May 1991. Until his retirement in
1988, he was President of the Cullum Cos., owner of Tom Thumb and Simon David
grocery stores and Page Drug stores.

         Michael A. McBee. Mr. McBee was elected a director of FNB Park Cities
in July 1984 and of Park Cities in May 1991. He is owner of the McBee Company,
an oil and gas exploration and production company. Related business interests
include Marymac Company and Amroc Oil Corporation.

         Donald J. Malouf. Mr. Malouf was elected a director of FNB Park Cities
in July 1984 and has served as an advisory director of FNB Park Cities since
October 1988; he also served as an advisory director of Park Cities from May
1991 until 1992. He was elected a director of Park Cities in April 1992. He is
an attorney and serves as Vice President of the law firm of Malouf Lynch Jackson
Kessler & Collins, P.C.

         Jon L. Mosle, Jr. (Advisory Director). Mr. Mosle was elected an
advisory director in 1992. Until his retirement, he was a principal of Rotan
Mosle, an investment firm. He is also a director of Southwest Securities, Inc.

         James G. Storey (Advisory Director). Mr. Storey was elected Senior Vice
President and Internal Auditor in November 1990 and Executive Vice President and
Auditor in November 1991. Mr. Storey was elected in advisory director of both
Park Cities Bancshares, Inc. and First National Bank of Park Cities in October
1992. He also serves as Vice President of Park Cities Corporation.

         Mrs. Jere W. Thompson. Mrs. Thompson was elected a director of FNB Park
Cities in July 1984 and of Park Cities in May 1991. She is a housewife and
community leader. Related business interests include The Thompson Company,
Williamsburg Corporation and Southland Corporation.

         Tom E. Turner. Mr. Turner was elected President, Chief Executive
Officer and a director in July 1984, and in December 1986, he was also elected
Chairman of the Board. As of September 1988, he was no longer President, but
remains Chairman of the Board and Chief Executive Officer of both FNB Park
Cities and Park Cities (effective May 1991). He also serves as Chairman of the
board and is a director of Park Cities Corporation.


                                                              Page ____ of ____.

                                     - 25 -
<PAGE>
 
         John C. Vogt. Mr. Vogt was elected a director of FNB Park Cities in
July 1984 and of Park Cities in May 1991. He is President of International
Supply Co., Inc., a plumbing supply company. Related business interests include
Industrial International, Inc., BV Interests, BSV Partnership, International
Showroom Partnership, Utility and Environmental Services, Inc.


                         INFORMATION ABOUT PARK CITIES
                         -----------------------------

GENERAL
- -------

         Park Cities, a Texas corporation, is a bank holding company under the
Bank Holding Company Act of 1956 located in Dallas, Texas. Park Cities owns
(indirectly through its wholly-owned intermediate bank holding company
subsidiary, Park Cities Corporation) 99.925% of FNB Park Cities, a national
banking association chartered in 1983. FNB Park Cities conducts its banking
business at 6215 Hillcrest Avenue and 6701 Preston Road in Dallas, Texas. The
Principal executive offices of Park Cities are located at 6215 Hillcrest,
Dallas, Texas 75205 and the telephone number is (214) 522-5858.

         At September 30, 1996, Park Cities had total consolidated assets,
deposits and shareholders' equity of approximately $206 million, $187 million
and $18 million, respectively. The primary operating entity of Park Cities, FNB
Park Cities, has 3 branches located in Dallas County, Texas, including a mobile
branch. FNB Park Cities is principally engaged in the business of attracting
deposits, primarily from the general public, through a variety of deposit
products and investing those deposits, together with funds from ongoing
operations, in the origination and purchase of one-to-four family residential
mortgage loans and securities backed by these mortgage loans and, to a lesser
extent, commercial, consumer and other mortgage loans. Additionally, FNB Park
Cities invests its funds in U.S. Government and Government Agency Securities.
FNB Park Cities considers its primary market area to be municipalities of
Highland Park and University Park and surrounding areas in Dallas, Texas.

         There is no public trading market for the Park Cities Common Stock.
Park Cities paid no cash dividends in 1994, 1995, or 1996. The Merger Agreement
prohibits the payment of dividends by Park Cities until the Merger is
consummated.

Results of Operations
- ---------------------

1994 versus 1993
- ----------------

Overview
Net income for Park Cities increased to $1.8 million for the year ended 1994, an
increase of $3 thousand or 0.2% from the prior year. Park Cities generated a
return on assets of 1.08% and 1.16% and a return on equity of 15.34% and 17.61%
during 1994 and 1993, respectively. The growth in earnings was primarily driven
by higher net interest income from growth in loans and securities and was
partially offset by lower noninterest income and higher noninterest expenses.


                                                              Page ____ of ____.

                                     - 26 -
<PAGE>
 
Net Interest Margin
Net interest income for Park Cities increased to $6.2 million for the year ended
1994, an increase of $588 thousand or 10.5% from 1993. This resulted in a net
interest margin of 4.01% compared to 3.92% in 1993, an increase of 9 basis
points. The margin remained strong due to strong growth in loans and the
securities portfolio. In addition, Park Cities continued to experience strong
growth in average noninterest-bearing deposits which resulted in a cost of funds
of 2.09% for 1994 compared to 2.18% in 1993.

Noninterest Income
Noninterest income was $871 thousand for the year ended 1994, a $352 thousand
(28.7%) decrease from the prior year, which was the result of the difference
between a $74 thousand loss on sale of securities in 1994 compared to a $277
thousand gain in 1993.

Noninterest Expenses
Noninterest expenses for the year ended 1994 were $4.4 million, an increase of
$252 thousand or 6.1% increase from the year ended 1993. The largest portion of
this increase was in salaries and benefits which increased $153 thousand (6.7%)
to $2.4 million during 1994. The additional expense was due to normal increases
in compensation. Additionally, rent expense increased $54 thousand (69%) due to
the addition of the operations center in 1994.

1995 versus 1994
- ----------------

Overview
Net income for Park Cities increased significantly to $2.3 million for the year
ended 1995, an increase of $493 thousand or 27.2% from the prior year. Park
Cities generated a return on assets of 1.24% and 1.08% and a return on equity of
16.68% and 15.34% during 1995 and 1994, respectively. The growth in earnings was
primarily driven by significantly higher net interest income from growth in
loans and securities and was partially offset by higher noninterest expenses.

Net Interest Margin
Net interest income for Park Cities increased sharply to $7.5 million for the
year ended 1995, an increase of $1.2 million or 19.5% from 1994. This resulted
in a net interest margin of 4.38% compared to 4.01% in 1994, an increase of 37
basis points. The margin remained strong due to strong growth in loans and the
securities portfolio, resulting in the increase of yield on earnings assets to
7.06% in 1995 as compared to 6.12% in 1994. Although interest rates rose in
1995, Park Cities also experienced growth in average noninterest-bearing
deposits which caused the cost of funds to increase to 2.69% compared to 2.09%
in 1994.

Noninterest Income
Noninterest income was $921 thousand for the year ended 1995, a $50 thousand
(5.7%) increase from the prior year, due primarily to increased balances in
deposit accounts.

Noninterest Expenses
Noninterest expenses for the year ended 1995 were $4.9 million, an increase of
$515 thousand or 11.7% increase from the year ended 1994. The largest portion of
this increase was in salaries


                                                              Page ____ of ____.

                                     - 27 -
<PAGE>
 
and benefits which increased $270 thousand to $2.7 million during 1995. The
additional expense resulted from the addition of three tellers to staff the new
motor bank as well as normal increases in compensation. The other large
component was due to the premium paid to call the then outstanding convertible
notes and additional advertising and promotion. Partially offsetting this
increase was a $141 thousand decrease in the FDIC insurance assessment from 1994
to 1995.

Nine Months Ended 1996 versus 1995
- ----------------------------------

Overview
Net income for Park Cities experienced strong growth increasing to $2.3 million
from $1.7 million, an increase of $602 thousand or 34.5% for the nine months
ended September 30, 1996 versus the same time period in 1995. This resulted in a
1.43% and 1.25% return on assets and 18.79% and 17.18% return on equity for the
nine months ended September 30, 1996 and 1995, respectively. The growth was
primarily from an increase in net interest income due to growth in low cost
deposits and loans, as well as tight expense control.

Net Interest Margin
Net interest income grew to $6.4 million from $5.5 million, an increase of $881
thousand or 15.9% for the nine months ended September 30, 1996 versus the same
period in 1995. This resulted in a net interest margin of 4.22% versus 4.30% for
the nine months ended September 30, 1996 versus 1995, respectively.

The growth was primarily attributable to interest income increasing to $10.4
million from $9.0 million for the nine months ended September 30, 1996 and 1995,
respectively, due primarily to robust earning asset growth. Average
interest-earning assets increased to $202.6 million from $171.6 million, an
increase of $31.0 million or 18.1% for the nine months ended September 30, 1996
and 1995, respectively. Partially offsetting the increase in interest income was
interest expense of $4.0 million for the nine months ended 1996 compared to $3.5
million for the same period in 1995. Average deposits and borrowed funds
increased to $201.7 million from $171.7 million for the nine months ended
September 30, 1996 and 1995, respectively. A large portion of the increase
occurred in time deposits due to the local school district deposits. In
addition, $1.3 million of subordinated convertible notes were bought back by
Park Cities at the end of 1995.

Noninterest Income
Noninterest income increased to $736 thousand from $706 thousand for the nine
months ended September 30, 1996 and 1995, respectively. The increase was due to
additional activity in deposit accounts.

Noninterest Expenses
Noninterest expense decreased by $44 thousand to $3.5 million for the nine
months ended September 30, 1996. The primary reason for the lower expenses was a
$175 thousand decrease in regulatory assessment and a $23 thousand drop in
advertising and business promotion. Partially offsetting the decrease was a $54
thousand increase in rent and a $127 thousand increase in salaries and benefits.


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                                     - 28 -
<PAGE>
 
Liquidity and Interest Sensitivity
- ----------------------------------

         One of Park Cities' primary objectives is maintaining a sufficient
level of liquid earning assets. Sustaining adequate liquidity requires a bank to
ensure the availability of funds to satisfy reserve requirements, loan demand,
deposit withdrawals and maturing liabilities, while funding asset growth and
producing appropriate earnings.

         Park Cities' asset growth is typically funded by increases in undivided
profits and expansion of the deposit base of FNB Park Cities. For 1995, Park
Cities experienced an approximate $2.0 million decrease in cash and cash
equivalents. Operating activities, boosted by net income for 1995 of $2.3
million, produced a net cash increase of $2.3 million. Investing activities used
net cash of $5.7 million with loan originations exceeding loan principal
collections by $8.3 million, evidencing strong loan demand. Additionally,
federal funds sold (not considered a cash-equivalent) increased $13.0 million.
Offsetting this net cash outflow was a net cash inflow of $16.0 million relating
to FNB Park Cities securities portfolio. A net increase in the deposit base of
$4.8 million offset by a $2.0 million reduction in repurchase agreements and the
use of $1.4 million to redeem the convertible subordinated notes resulted in net
cash provided in financing activities of $1.3 million.

         A reciprocal measure of Park Cities' liquidity is the loans-to-deposits
ratio of FNB Park Cities. At December 31, 1995 and 1994, the ratios were 36.6%
and 33.3%, respectively. FNB Park Cities' liquid assets, composed of securities,
federal funds sold, and cash and due from banks, totaled 69.2% of total deposits
at December 31, 1995, down from 73.2% a year earlier, but still highly liquid.
For the nine months ending September 30, 1996 and 1995 FNB Park Cities'
loans-to-deposits ratio were 40.6% and 43.4%, respectively. At September 30,
1996, liquid assets totaled 67.1% of total deposits at FNB Park Cities.

Securities Portfolio
- --------------------

         Park Cities' securities portfolio was $100.1 million at September 30,
1996 and comprised 48.5% of total assets. Park Cities manages its securities
portfolio conservatively and uses it to enhance its net interest margin, which
is why the majority of the portfolio is classified as held to maturity. The
aggregate portfolio has a short maturity with a weighted average life of 3.6
years and a duration of 2.6 years. The held to maturity portfolio was $57.7
million or 57.6% of the total securities portfolio at September 30, 1996 and was
yielding 6.04% with a weighted average life of 5.0 years and a duration of 3.5
years. The available for sale portfolio was $42.4 million with a 1.6 year
weighted average life and a 1.5 year duration and was yielding 6.11%.

Loan Portfolio
- --------------

         FNB Park Cities's loan portfolio was $76.0 million at September 30,
1996, an increase of $6.1 million or 8.7% from the same period last year. The
increase occurred in all segments of the portfolio and was a result of a healthy
Dallas economy, growth within the customer base and market disruption from
reorganizations and consolidations involving large out of state banks.


                                                              Page ____ of ____.

                                     - 29 -
<PAGE>
 
         Real estate loans, by design, are the largest segment of the loan
portfolio. Total real estate loans were $52.0 million and comprised 68.4% of the
total portfolio at September 30, 1996. The largest component of the loan
portfolio is residential loans with first liens which comprised $35.2 million or
46.3% of the aggregate portfolio. FNB Park Cities typically makes residential
loans as jumbo mortgages, due to the high median house cost with a maximum of
75% loan to value. These loans are adjustable rate or miniperm loans usually
with a three year term. Commercial real estate loans were increased
significantly to $9.2 million compared to $6.9 million, an increase of $2.2
million or 32.0% at September 30, 1996 and 1995, respectively. The other
components of real estate loans were a much smaller portion of the portfolio. At
September 30, 1996, FNB Park Cities had residential loans with a second lien of
$3.2 million, multifamily loans of $1.3 million, construction and land
development loans of $2.8 million and real estate secured by farm land of $269
thousand.

         The remainder of the loan portfolio has experienced strong growth.
Commercial and industrial loans were $15.5 million at September 30, 1996 and
made up 20.4% of the portfolio. C&I loans grew $536 thousand or 3.6% from the
comparable period in 1995. Consumer loans, which consist of automobile loans,
boat loans and other personal loans, grew to $8.4 million from $7.1 million, an
increase of $1.3 million or 17.6% from September 30, 1996 to September 30, 1995,
respectively.

         The following table presents the composition of the loan portfolio at
September 30, 1996 and 1995, and at the end of each of the last five years.

<TABLE> 
<CAPTION> 
                                           September 30                                  December 31
                                        ------------------        ------------------------------------------------------------
                                                          
                                         1996         1995        1995          1994        1993         1992         1991
                                         ----         ----        ----          ----        ----         ----         ----
                                                                          (In thousands)
<S>                                     <C>          <C>          <C>           <C>         <C>          <C>          <C> 
Real estate loans:
  Construction and land development      $ 2,831     $ 2,476       $ 2,266      $ 1,576     $ 2,103      $ 2,673       $ 1,600
  Secured by farmland                        269         130           125           86         101          160             -
  Residential-secured by first lien       35,192      32,395        33,440       30,441      28,335       26,313        26,559
  Residential-secured by junior lien       3,248       3,145         3,532        2,351       1,744        2,748         2,665
  Multifamily                              1,262       2,156         2,135        1,651       1,580        1,405         1,050
  Nonfarm nonresidential properties        9,153       6,936         7,753        7,304       6,540        3,959         5,074
                                         -------     -------       -------      -------     -------      -------       -------
Total real estate loans                   51,955      47,238        49,251       43,409      40,403       37,258        36,948
Commercial and industrial                 15,516      14,980        14,174       11,630      11,669       10,269         6,885
Consumer loans                             8,393       7,138         7,773        7,853       8,019        6,322         7,699
Other                                        109         512           153           81          52           27            88
                                         -------     -------      --------      -------     -------    ---------      --------
Total loans                              $75,973     $69,868      $ 71,351      $62,973     $60,143      $53,876      $ 51,620
                                         =======     =======      ========      =======     =======      =======      ========
</TABLE> 

Deposit Composition
- -------------------

         FNB Park Cities' deposit base has demonstrated strong growth in
balances and number of accounts. This growth has been primarily as a result of
customer referral, community involvement by the Bank and market growth, as FNB
Park Cities does not advertise for deposits.

         FNB Park Cities's deposits were $187.2 million at September 30, 1996
compared to $161.0 million at September 30, 1995, an increase of $26.2 million
or $16.3%. Demand deposits were the largest segment of deposits comprising $56.7
million at September 30, 1996 or 30.3% of total deposits. Demand deposit
accounts increased $12.7 million or 28.9% from September 30, 1996 versus the
same period in 1995. Certificates of deposit larger than $100


                                                              Page ____ of ____.

                                     - 30 -
<PAGE>
 
thousand increased to $41.6 million at September 30, 1996, an increase of $13.6
million or 48.8%. Most of the increase in certificates of deposit was from
deposits by the local school districts.

         The following table presents the composition of total deposits at
September 30, 1996 and 1995 and at the end of the last five years.

<TABLE> 
<CAPTION> 
                                           September 30                               December 31
                                       -------------------       ----------------------------------------------------------

                                      1996          1995         1995        1994         1993         1992        1991
                                      ----          ----         ----        ----         ----         ----        ----
<S>                                   <C>         <C>           <C>         <C>          <C>         <C>           <C> 
                                                                                     (In thousands)

Demand deposits                       $ 56,676     $ 43,984     $ 54,163    $ 53,742     $ 37,891     $ 35,843     $ 22,853

Interest-bearing demand deposits        26,452       26,103       27,412      26,047       27,428       23,584       20,093

Money market deposits                   37,858       39,422       43,093      46,421       38,868       34,951       35,467

Savings deposits                         4,847        5,092        4,946       5,723        6,379        6,077        3,060

Time deposits less than $100,000        19,762       18,413       19,962      18,979       19,661       22,081       27,996

Time deposits greater than $100,000     41,602       27,965       45,459      39,367       22,253       29,536       43,272
                                      --------     --------     --------    --------     --------     --------     --------


Total deposits                        $187,197     $160,979     $195,035    $190,279     $152,480     $152,072     $152,741
                                      ========     ========     ========    ========     ========     ========     ========
</TABLE> 

         FNB Park Cities had over 13,600 deposit accounts at September 30, 1996,
of which almost 10,000 accounts were checking accounts. Accounts increased by
almost 1,000 from September 30, 1995 or 7.4%. Almost all new accounts were in
core deposits with only 55 new accounts in certificates of deposit.

Capital Adequacy
- ----------------

         Park Cities and FNB Park Cities are required to maintain adequate
levels of capital. The Federal Reserve Board's guidelines classify capital into
two tiers, referred to as Tier 1 and Tier 2. Tier 1 capital consists of common
and qualifying preferred shareholders' equity less goodwill. Tier 2 capital
consists of mandatory convertible debt, preferred stock not qualifying as Tier 1
capital, qualifying subordinated debt and the allowance for loan losses up to
1.25% for risk-weighted assets. The minimum ratio for the sum of Tier 1 and Tier
2 is 8.0%, at least one-half of which should be in the form of Tier 1 capital.
At September 30, 1996, core capital (Tier 1) and total capital (Tier 1 and Tier
2) of Park Cities as a percentage of risk-weighted assets was 25.3% and 26.5%,
respectively. At September 30, 1996, FNB Park Cities had core capital of 24.9%
and total capital of 26.1% as a percentage of risk-weighted assets.

         In addition to the foregoing ratios, bank holding companies are
required to maintain a minimum ratio of core capital to total assets
(hereinafter referred to at the "Leverage Ratio") of at least 4.0%. At September
30, 1996, Park Cities' Leverage Ratio was 8.6%. A similar leverage ratio
applicable to FNB Park Cities has been adopted by the FDIC. At September 30,
1996, FNB Park Cities' ratio was 8.5%.

         At September 30, 1996, neither Park Cities nor FNB Park Cities had any
material commitments for any capital expenditures.

                                                              Page ____ of ____.

                                     - 31 -
<PAGE>
 
         The following table summarizes Park Cities's capital ratios and amounts
at September 30, 1996 and 1995 and for each of the last five years.

<TABLE> 
<CAPTION> 
                                      September 30,                                      December 31,
                                    ------------------         ------------------------------------------------------------

                                    1996          1995         1995          1994          1993          1992          1991
                                    ----          ----         ----          ----          ----          ----          ----
<S>                                 <C>          <C>           <C>           <C>           <C>           <C>          <C> 
                                                                     (Dollars in thousands)

Total shareholders' equity          $ 17,843     $ 14,748      $ 15,526      $ 12,260      $ 11,265      $  9,440     $   7,985

Goodwill and other intangibles             -            -             -             -             -             -             -

Total Tier I capital                  17,816       14,825        15,405        13,079        11,265         9,440         7,985

Total Tier II capital                    876        2,114           835         2,118         2,056         2,100         1,848
                                    --------      -------      --------      --------      --------      --------     ---------

Total qualifying capital            $ 18,692      $16,939      $ 16,240      $ 15,197      $ 13,321      $ 11,540     $   9,833

Risk-adjusted assets                $ 70,488      $63,089      $ 70,405      $ 63,467      $ 54,464      $ 48,648      $ 48,203


Ratios:

Tier I capital ratio                  25.28%       23.50%        21.88%        20.61%        20.68%        19.40%        16.57%

Total capital ratio                   26.52%       26.85%        23.07%        23.94%        24.46%        23.72%        20.40%

Total leverage ratio                   8.64%        8.32%         7.27%         6.31%         6.73%         5.75%         4.89%
</TABLE> 

Nonperforming Assets
- --------------------

         FNB Park Cities uses conservative underwriting standards and has a low
level of nonperforming loans and no other real estate owned. The bank had only
two nonperforming assets at September 30, 1996, totaling $43,230, one of which
was paid off in October 1996.

Loan Loss Reserve Methodology
- -----------------------------

         FNB Park Cities' loan loss reserve methodology is conservative and
reviews a number of factors including loan concentration, loan grading and
historical loss averages to calculate the loan loss reserve. Specific grades are
attached to the principal amount of loans outstanding in each category. Other
assets especially mentioned ("OAEM") are assigned a 2.50% loan loss reserve and
any loan rated substandard, doubtful or loss are assigned a specific reserve. In
addition, a loan migration schedule is used to assign a loan loss reserve to the
respective category.

Loan Loss Reserve Reconciliation
- --------------------------------

         The following table summarizes the changes in the reserve for possible
loan losses as of September 30, 1996 and 1995 and for each of the last five
years.

<TABLE> 
<CAPTION> 
                                             For the Nine Months                          For the Year Ended
                                             Ended September 30                               December 31
                                             ------------------      -----------------------------------------------------------
                                             1996          1995          1995        1994         1993         1992         1991
                                             ----          ----          ----        ----         ----         ----         ----
<S>                                         <C>            <C>         <C>          <C>         <C>          <C>          <C> 
Balance at beginning of period              $   835        $   794     $    794     $    823    $    725     $    856     $    858
Provision charged to (benefiting) operations     40             10           10          (90)          -           60          204
Losses charged to reserve                        (2)            (3)          (3)          (4)        (64)        (274)        (280)
Recoveries on loans charged-off                   3             31           34           65         162           83           74
                                            -------        -------     --------     --------    --------     --------     --------
Net (charge-offs) recoveries                      1             28           31           61          98         (191)        (206)
                                            -------        -------     --------     --------    --------     --------     --------
Balance at end of period                    $   876        $   832     $    835     $    794    $    823     $    725     $    856
                                            =======       ========    =========     ========    ========     ========     ========
</TABLE> 

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                                     - 32 -
<PAGE>
 
                                   PARK CITIES
                                   -----------
                   SELECTED CONSOLIDATED FINANCIAL INFORMATION
                   -------------------------------------------
                      (In Thousands, Except Per Share Data)

         The following table sets forth certain selected historical consolidated
financial data for Park Cities. The selected data presented below under the
captions "Results of Operations" and "Balance Sheet (Period End)" for, and as of
the end of, each of the years in the five year period ended December 31, 1995,
are derived from the consolidated financial statements of the Company, which
financial statements have been audited by Coopers & Lybrand L.L.P., independent
certified public accountants. The following selected interim consolidated
financial information for the Company and its subsidiaries as of and for the
nine months ended September 30, 1996 and 1995 has been derived from unaudited
consolidated financial statements which, in the opinion of management, reflect
all adjustments, consisting of normal recurring accruals, considered necessary
for a fair presentation. The results of operations for such nine month periods
are not necessarily indicative of the results which may be expected for any
other interim period or for the full year.

<TABLE> 
<CAPTION> 
                                As of and for the
                                   Nine Months
                                      Ended                                       As of and for the Year
                                   September 30                                      Ended December 31
                            -------------------------      --------------------------------------------------------------------

                              1996            1995           1995       1994         1993              1992              1991
                              ----            ----           ----       ----         ----              ----              ----
<S>                         <C>             <C>           <C>           <C>          <C>              <C>               <C> 
                                                       (Dollars in thousands except per share amounts)

Results of Operation

Interest income             $ 10,382        $  8,997       $12,123      $  9,469     $   8,774         $10,044           $11,722

Interest expense               3,974           3,470         4,591         3,263         3,156           4,378             6,830
                            --------        --------       -------      --------     ---------         -------           -------

Net interest income            6,408           5,527         7,532         6,206         5,618           5,666             4,892

Provision for
possible loan losses              40              10            10          (90)            -               60               204

Noninterest income               736             706           921           871         1,222           1,196             1,074

Noninterest expense            3,521           3,566         4,920         4,404         4,152           4,055             3,680
                            --------        --------       -------      --------     ---------         -------           -------

Income before
income taxes                   3,583           2,657         3,523         2,763         2,688           2,747             2,082

Income taxes                   1,237             913         1,215           948           876             938               734
                            --------        --------       -------      --------     ---------          ------           -------

Net income                     2,346           1,744         2,308         1,815         1,812           1,809             1,348
                            ========        ========       =======      ========     =========          ======           =======

Net income per share        $   2.21        $   1.67       $  2.20      $   1.78     $    1.79         $  1.83           $  1.28

Balance Sheet
(Period End):

Securities                  $100,091        $ 83,159       $ 83,673     $ 98,032     $  75,771         $ 65,808          $ 72,568

Loans                         75,973          69,868         71,351       62,973        60,143           53,876            51,620

Reserve for possible
loan losses                      876             832            835          794           824              725               856


Total assets                 206,269         178,293        211,912      207,181       167,287          164,035           163,144
</TABLE> 


                                                              Page ____ of ____.

                                     - 33 -
<PAGE>
 
<TABLE> 
<CAPTION> 
                                As of and for the
                                   Nine Months
                                      Ended                                       As of and for the Year
                                   September 30                                      Ended December 31
                            -------------------------      --------------------------------------------------------------------

                              1996            1995           1995       1994         1993              1992              1991
                              ----            ----           ----       ----         ----              ----              ----
<S>                         <C>             <C>           <C>           <C>          <C>              <C>               <C> 
                                                       (Dollars in thousands except per share amounts)

Demand deposits              120,986         109,509        124,668      126,210     104,187           94,378            78,413

Total deposits               187,197         160,979        195,035      190,279     152,480          152,072           152,741

Convertible subordinated
notes                          -               1,325              -        1,325       1,375            1,375             1,125

Total shareholders' equity    17,843          14,748         15,526       12,260      11,265            9,440             7,985



Selected Financial
Ratios:

Return on average assets       1.43%           1.25%          1.24%        1.08%       1.16%            1.19%             0.92%
                                                                                                  
Return on average                                                                                 
shareholders' equity          18.79           17.18           16.68        15.34       17.62            20.85             16.36
                                                                                                  
Net interest margin            4.22            4.30            4.38         4.01        3.92             4.01              3.55
                                                                                                  
Efficiency ratio              49.29           57.21           58.19        62.23       60.69            59.10             61.68
                                                                                                  
Net charge-offs                                                                                   
to average loans              (0.00)          (0.02)         (0.05)       (0.10)      (0.17)             0.36              0.40
                                                                                                  
Average shareholders'                                                                             
equity to assets               7.59            7.27            7.42         7.03        6.60             5.70              5.60
                                                                                                  
Nonperforming assets                                                                              
to loans + OREO                0.06            0.30            0.09         0.29        0.86             1.42              1.62
                                                                                                  
Allowance for possible                                                                            
loan losses to total loans     1.15            1.19            1.17         1.26        1.37             1.35              1.66
                                                                                                  
                                                                                                  
Allowance for possible                                                                            
loan losses to                                                                                    
nonperforming loans          2,037.2          390.6         1,284.6        441.1       160.0             94.9             113.5
</TABLE> 


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                                     - 34 -
<PAGE>
 
                 SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
                           OF PARK CITIES COMMON STOCK
                           ---------------------------

         The following table presents the name and address, amount and nature of
beneficial ownership, and percent of class held by all persons known to BOK
Financial to be the beneficial owner of 5% or more of the shares of Park Cities
Common Stock, as of October 1, 1996.

<TABLE> 
<CAPTION> 
                                   Amount & Nature of         Percent of
Name of Beneficial Owner          Beneficial Ownership       Common Stock
- ------------------------          --------------------       ------------
<S>                                     <C>                       <C> 
Tom E. Turner
3120 Princeton
Dallas, Texas                            133,363/1//                12.9
                                                 -                                                                    
C. Thomas Abbott                                                  
4206 Fairfax                                                      
Dallas, Texas                             94,626/2//                 9.6
                                                 -                                                                    
                                                                     
John C. Vogt                                                      
P.O. Box 543165                                                   
Dallas, Texas                             56,593/3//                 6.1
                                                 -                                                                    
                                                                     
C. Huston Bell                                                    
2911 Turtle Creek Blvd.
Suite 500
Dallas, Texas                             91,278/4//                 9.9 
                                                 -                                                                    
</TABLE> 
     
     
/1//  Includes options to purchase 115,974 shares which must be exercised in
 -
      connection with the Merger.

/2//  Includes options to purchase 68,054 shares which must be exercised in
 -
      connection with the Merger.

/3//  Includes options to purchase 1,784 shares which must be exercised in
 -
      connection with the Merger.

/4//  Includes options to purchase 1,055 shares which must be exercised in
 -
      connection with the Merger and 89,902 shares owned by Belmont Equities, 
      Inc. of which Mr. Bell is a principal.

                                                              Page ____ of ____.

                                     - 35 -
<PAGE>
 
                        SECURITY OWNERSHIP OF MANAGEMENT
                           IN PARK CITIES COMMON STOCK
                           ---------------------------

         The following table presents the beneficial ownership of all Park
Cities directors and of all Park Cities directors and executive officers as a
group in Park Cities Common Stock as of November 1, 1996.

<TABLE> 
<CAPTION> 
                                      Amount & Nature of        Percent of
Name of Beneficial Owner             Beneficial Ownership      Common Stock
- ------------------------             --------------------      ------------
<S>                                         <C>                    <C> 
Tom E. Turner                               133,363/1/               12.9
                                                    -

C. Thomas Abbott                             94,626/2/                9.6
                                                    -
                                                                        
Charles A. Angel, Jr.                        32,649/3/                3.5
                                                    -
                                                                        
Webber W. Beall, Jr.                         23,037                   2.5
                                                                        
C. Huston Bell                               91,278/4/                9.9
                                                    -
                                                                        
Ben R. Briggs                                15,473                   1.7
                                                                        
R. Neal Bright                               16,463/5/                1.8
                                                    -
                                                                        
Edward F. Doran                              15,571/6/                1.7
                                                    -
                                                                        
James J. Ellis                                9,332/7/                1.0
                                                    -
                                                                        
R. William Gribble, Jr.                      21,528/8/                2.3
                                                    -
                                                                        
J.T. Hairston, Jr.                            6,699/9/                0.7
                                                    -
                                                                        
Donald J. Malouf                             18,671/10/               2.0
                                                    --
                                                                        
Michael A. McBee                             24,589/11/               2.7
                                                    --
                                                                        
Mrs. Jere W. Thompson                        33,472/12/               3.6
                                                    --
                                                                        
John C. Vogt                                 56,593/13/               6.1
                                                    --
                                                                        
Edward O. Boshell, Jr.                       31,891                   3.5
                                                                        
Jon L. Mosle, Jr.                            13,847/14/               1.5
                                                    --
                                                                        
Jane Colesar                                 20,790/15/               2.2
                                                    --
                                                                        
James G. Storey                              19,186/16/               2.0
                                                    --
                                                                        
All Directors and Executive Officers        679,058                  57.8
as a Group (19 Persons)
</TABLE> 
                                                              Page ____ of ____.

                                     - 36 -
<PAGE>
 
1/  Includes options to purchase 115,974 shares which must be exercised in
    connection with the Merger.

2/  Includes options to purchase 68,054 shares which must be exercised in
    connection with the Merger.

3/  Includes options to purchase 18,755 shares which must be exercised in
    connection with the Merger.

4/  Includes options to purchase 1,055 shares which must be exercised in
    connection with the Merger and 89,902 shares owned by Belmont Equities, Inc.
    of which Mr. Bell is a principal.

5/  Includes options to purchase 1,093 shares which must be exercised in
    connection with the Merger and 3,659 shares owned by Mrs. Bright.

6/  Includes options to purchase 1,078 shares which must be exercised in
    connection with the Merger.

7/  Includes options to purchase 548 shares which must be exercised in
    connection with the Merger.

8/  Includes options to purchase 2,042 shares which must be exercised in
    connection with the Merger.

9/  Includes options to purchase 1,385 shares which must be exercised in
    connection with the Merger.

10/ Includes options to purchase 958 shares which must be exercised in
    connection with the Merger and 5,314 shares owned by MLJKC Employees
    Retirement Plan of which Mr. Malouf is a principal.

11/ Includes options to purchase 1,829 shares which must be exercised in
    connection with the Merger.

12/ Includes options to purchase 1,587 shares which must be exercised in
    connection with the Merger and 31,532 shares owned by The Williamsburg
    Corporation of which Mrs. Thompson's husband is a principal.

13/ Includes options to purchase 1,784 shares which must be exercised in
    connection with the Merger and 8,052 shares owned by John C. Vogt Keogh Plan
    and 2,826 shares owned by Mr. Vogt's children's trusts.

14/ Includes 5,635 shares owned by Mrs. Mosle and 7,320 shares owned by Paine
    Webber Custodian fbo Jon L. Mosle, Jr. IRA RLVR.

15/ Includes options to purchase 19,788 shares which must be exercised in
    connection with the Merger.

16/ Includes options to purchase 18,016 shares which must be exercised in
    connection with the Merger.

                                                              Page ____ of ____.

                                     - 37 -
<PAGE>
 
                     COMPENSATION OF PARK CITIES EXECUTIVES
                     --------------------------------------

         Park Cities has not paid and does not currently propose to pay any of
its officers or directors. All of such individuals serve as officers and/or
directors of FNB Park Cities and are remunerated in such capacities as set forth
below. The Following table shows, on an accrual basis, all direct remuneration
paid by FNB Park Cities for the year ended December 31, 1995 to all executive
officers of Park Cities as a group.

<TABLE> 
<CAPTION> 
          Name of Individual
             or Number of                           Capacities in                     Aggregate Direct
           Persons in Group                         Which Served                     Remuneration (1)(2)
- ----------------------------------------------------------------------------------------------------------------
<S>                                      <C>                                            <C> 
Tom E. Turner (3)                        Chairman of the Board                          $305,396
                                         and Chief Executive
                                         Officer

C. Thomas Abbott                         President                                      $197,720

Charles A. Angel, Jr.                    Vice Chairman                                  $115,268

James G. Storey                          Executive Vice President                       $102,704
                                         and Auditor

Jane Colesar                             Executive Vice President                       $ 99,792
                                         and Chief Financial
                                         Officer

all executive officers as a                                                             $820,880
group (5 persons)
</TABLE> 


(1)      Included in this column are cash salaries and bonuses paid for services
         rendered during the fiscal year, automobile allowances, directors' fees
         and FNB Park Cities' matching contributions to the Profit Sharing Plan.

(2)      Does not include any amount for the personal benefits obtained from the
         use of cars and club memberships. The total value of such benefits did
         not exceed the lesser of $25,000 or 10% of the cash compensation
         reported above for any of the executive officers of FNB Park Cities.
         The aggregate value of such benefits averaged under $25,000 and is less
         than 10% of compensation reported in the compensation table for
         executive officers as a group.

(3)      Mr. Turner has also entered into a deferred compensation plan with FNB
         Park Cities. See "Deferred Compensation" below.

         Each director of FNB Park Cities receives $8,400 per year for serving
on the Board of Directors. The fee is paid $700 per month at each regular
meeting, but is not based on attendance. Directors who are not officers also
receive stock options for attendance at Board meetings. See "Compensation
Pursuant to Plans" below.

                                                              Page ____ of ____.

                                     - 38 -
<PAGE>
 
Deferred Compensation
- ---------------------

         In January 1986, the Board of Directors of FNB Park Cities and Mr.
Turner entered into an agreement to provide Mr. Turner with post-retirement or
post-death benefits in the event his employment is terminated for any reason
other than dishonesty. Under the agreement, if Mr. Turner dies during his
employment prior to attaining the age of 65, his beneficiaries will receive
total benefits of $940,000, payable in monthly installments. Upon Mr. Turner's
attaining the age of 65 while still employed by FNB Park Cities, and during his
retirement thereafter, FNB Park Cities will pay Mr. Turner a retirement benefit
of $94,000 per year, payable in equal monthly installments, for ten years. In
the event Mr. Turner's employment is terminated for any reason, other than
dishonesty, prior to attaining the age of 65, he will be entitled to receive
monthly benefits based upon his salary during the preceding 36 months, subject
to certain conditions, for 24 months following his termination. 

Compensation Pursuant to Plans
- ------------------------------

         Park Cities maintains a Nonqualified Stock Option Plan (the "Option
Plan"). The purpose of the Option Plan is to assist Park Cities and FNB Park
Cities in attracting and retaining employees, directors and advisory directors,
by providing them with ownership interests in Park Cities and, as described
below, to provide a form of compensation for persons serving as outside
directors and advisory directors of Park Cities and FNB Park Cities.

          Under the Option Plan, 354,312 shares of Park Cities' common stock are
reserved for issuance. As of October 31, 1996, there were outstanding options to
purchase 271,686 shares of common stock. The Plan is interpreted and
administered by the Board of Directors. All employees, directors and advisory
directors of FNB Park Cities are eligible to participate in the Option Plan.
Subject to limitations contained in the Option Plan, the Board of Directors has
complete discretion to fix the terms and number of options to be granted and the
employees who will receive options. All options granted under the Option Plan
become exercisable in the amounts and at the intervals specified by the Board of
Directors at the time of grant.

          Under the Option Plan, the Board of Directors in 1988 approved the
grant of options ("Directors Options") to FNB Park Cities' outside directors and
advisory directors to provide such directors with ownership interests in Park
Cities as an incentive to retain their services, Under this plan, a number of
shares of common stock are to be reserved during each calendar year for possible
issuance. With respect to each monthly meeting of the Board of Directors, a pool
of shares of common stock is established in an amount equal to the number of
directors and advisory directors times 17.7. Each outside director and advisory
director who attends that meeting will receive options to purchase a number of
shares equal to the whole number given by dividing the total number of shares
available in the pool by the number of eligible directors who attend the
meeting. The exercise price of such options will be equal to the market value of
the underlying common stock on the date of the grant of the options. All such
options will be immediately exercisable in full and will expire ten years from
the date of grant; provided

                                                              Page ____ of ____.

                                     - 39 -
<PAGE>
 
that, if a director ceases to be a director for any reason, his options will
expire one year from the date of termination.

Profit Sharing Plan
- -------------------

         On January 1, 1993, FNB Park Cities implemented a voluntary 401(k)
Profit Sharing Plan. Generally, employees may voluntarily contribute up to 15%
of their pre-tax salary to the plan. FNB Park Cities has elected to make
discretionary matching contributions equal to a percentage of the employee's
contribution. The percentage match is determined by FNB Park Cities each year
and was 50% up to 4% of each employee's salary during 1993, 1994 and 1995.
Employees vest in the plan ratably over five years after one year of service.
The charge to expense in connection with FNB Park Cities' matching contributions
was $49,178, $47,333 and $37,000 for the years ended December 31, 1995, 1994 and
1993, respectively.

  INTEREST OF PARK CITIES DIRECTORS AND OFFICERS IN THE MERGER
  ------------------------------------------------------------

         Upon consummation of the Merger, Messrs. Turner, Abbott, and Angel will
enter into employment agreements with FNB Park Cities. Under the employment
agreements Messrs. Turner, Abbott, and Angel will be employed by FNB Park Cities
for a period of three years in their existing positions at approximately their
existing compensation levels. In addition, pursuant to the employment
agreements, Messrs. Turner, Abbott, and Angel will agree not to compete with FNB
Park Cities for a period of two years following termination of employment during
which period each will be compensated at reduced levels.

                        DESCRIPTION OF BOKF CAPITAL STOCK
                        ---------------------------------

BOKF COMMON STOCK
- -----------------

General
- -------

         The following is a general summary of certain provisions of the BOKF
Common Stock, and is qualified in its entirety by reference to the Certificate
of Incorporation of BOK Financial.

         Under its Certificate of Incorporation, BOK Financial is authorized to
issue 2,500,000,000 shares of Common Stock, $0.00006 par value. The issued and
outstanding shares of Common Stock are offered hereby fully paid and
nonassessable. At September 30, 1996, 20,488,254 shares of BOKF Common Stock
were issued and outstanding.

Dividend Rights
- ---------------

         Holders of BOKF Common Stock are entitled to receive dividends when and
as declared by the Board of Directors out of funds legally available therefore.
There is no assurance that BOK Financial will be able to pay dividends on the
BOKF Common Stock and no dividends are

                                                              Page ____ of ____.

                                     - 40 -
<PAGE>
 
currently anticipated. No BOKF Common Stock dividends can be paid unless all
accrued dividends on BOKF Preferred Stock have been paid.

Liquidation Rights
- ------------------

         In the event of the voluntary or involuntary dissolution, liquidation
or winding-up of BOK Financial, holders of BOKF Common Stock are entitled to
receive, pro rata, after satisfaction in full of the prior rights of creditors,
holders of any outstanding preferred stock and any series of BOKF Common Stock
with preference rights, all of the remaining assets of BOK Financial available
for distribution.

Voting Rights
- -------------

         Holders of shares of outstanding BOKF Common Stock are entitled to one
vote for each share at the election of directors and on any question arising at
any shareholders' meeting. Holders of BOKF Common Stock do not have cumulative
voting rights.

Preemptive Rights
- -----------------

         The holders of BOKF Common Stock are not entitled to preemptive rights.

Transfer Agent
- --------------

         Bank of Oklahoma, National Association is the transfer agent for BOKF
Common Stock.

                              BOKF PREFERRED STOCK
                              --------------------
 
General
- -------

         The following is a general summary of certain provisions of the BOKF
Series A Preferred Stock ("Series A Preferred Stock") and is qualified in its
entirety by reference to the Certificate of Incorporation of BOK Financial.

         Under its Certificate of Incorporation, BOK Financial is authorized to
issue 1,000,000,000 shares of preferred stock, $0.00005 par value. The Board of
Directors of BOK Financial is authorized to issue preferred stock in series and
to fix the particular designation, powers, preferences, rights (including
dividends, voting rights and liquidation preferences), qualifications and
restrictions.

         The preferred stock of BOK Financial presently consists of a single
series of 300,000,000 shares of Series A Preferred Stock, $0.00005 par value. As
of April 1, 1994, 250,000,000 shares of Series A Preferred Stock were
outstanding. Kaiser owns 249,490,880 shares of the Series A Preferred Stock and
three employees of affiliates of Kaiser owns 509,120 shares.

                                                              Page ____ of ____.

                                     - 41 -
<PAGE>
 
         The Series A Preferred Stock has no voting rights under the Certificate
of Incorporation, and under Oklahoma corporate law would only have the right to
vote in the event of a proposed Amendment of the Certificate of Incorporation
which would alter or change the special rights and preferences of the Series A
Preferred Stock, or change the par value, or increase or decrease the number of
authorized shares.

Dividend Rights
- ---------------

         Each share of Series A Preferred Stock entitles the holder thereof to
cumulative cash dividends at the annual rate of ten percent (10%) of the $0.06
liquidation preference value per share, when and as declared by the Board of
Directors of BOK Financial, payable on the first day of January, April, July,
and October. In the event BOK Financial cannot pay cash dividends by reason of
applicable federal banking regulations, the Board of Directors may, in lieu of
paying cash dividends, pay dividends by issuing Common Stock having an aggregate
market value, based on an average over the prior quarter, equal to the dividend
amount. If all accrued dividends on the Series A Preferred Stock have not been
paid, no dividends will be paid on BOKF Common Stock.

Redemption Rights
- -----------------

         Any shares of Series A Preferred Stock may be redeemed at the option of
BOK Financial at any time, so long as (i) the redemption will be in compliance
with all regulatory requirements, and (ii) all dividends accrued on the shares
to be redeemed are paid in full. The redemption price per share is equal to the
$0.06 liquidation preference value, plus all accrued and unpaid dividends. In
the event BOK Financial shall give notice of redemption of any Series A
Preferred Stock, then the holder of such Series A Preferred Stock may elect to
convert the same to BOKF Common Stock pursuant to the Conversion Rights
described below. In the event of the redemption of only a portion of the Series
A Preferred Stock then outstanding, the shares to be redeemed shall be selected
pro rata, by lot, or by any other method that the Board of Directors of BOK
Financial may determine.

Liquidation Rights
- ------------------

         Upon the voluntary or involuntary dissolution, liquidation, or
winding-up of BOK Financial, the holders of the shares of Series A Preferred
Stock then outstanding shall be entitled to priority of payment out of the
assets of BOK Financial, whether representing capital or surplus, in the amount
of $0.06 per share, together with all dividends thereon accumulated and unpaid
at such time, whether or not earned or declared, before any amount shall be paid
to the holders of any shares of the BOKF Common Stock or of any other class or
series of stock of BOK Financial junior to Series A Preferred Stock upon
liquidation. The Series A Preferred Stock will be superior to the rights of any
other series of preferred stock that BOK Financial may hereafter lawfully
establish with rights in dissolution, liquidation or winding up. The entire
consideration paid for the Series A Preferred Stock, in the amount of $0.06 per
share, is allocated to capital and such capital may not be reduced below the
liquidation preference value of the Series A Preferred Stock, which is also
$0.06 per share.

                                                              Page ____ of ____.

                                     - 42 -
<PAGE>
 
Sinking Fund Provisions
- -----------------------

         No sinking fund is provided for the redemption or purchase of shares of
BOKF Series A Preferred Stock.

Conversion Rights
- -----------------

         Any share of Series A Preferred Stock may be converted to BOKF Common
Stock after December 31, 1994 at any time, at the option of the holder, at a
ratio of 1.1215 share of BOKF Common Stock for each 100 shares of Series A
Preferred Stock. BOK Financial may elect to convert all or part of the Series A
Preferred Stock into BOKF Common Stock, on a 1.1215 for each 100 shares basis,
if BOK Financial shall fail to meet the published minimum risk-based capital
ratios applicable to BOK Financial for a period of eight consecutive calendar
quarters. Appropriate adjustments in the conversion ratios will be made in the
event of a subdivision (by stock split, stock dividend, recapitalization or
otherwise) or combination (by reverse stock split or otherwise) of shares of
BOKF Common Stock. The conversion ratios set forth above reflect the November
18, 1993, November 17, 1994, November 17, 1995, and November 18, 1996, 3% BOKF
Common Stock dividends which were paid in kind by the issuance of BOKF Common
Stock.

Voting Rights
- -------------

         Holders of Series A Preferred Stock have no voting rights except as
otherwise provided by Oklahoma corporate law.

Preemption Rights
- -----------------

         No shares of Series A Preferred Stock shall have any rights of
preemption.

Transfer Agent
- --------------

         Bank of Oklahoma, National Association is the transfer agent for the
Series A Preferred Stock.

                                 INDEMNIFICATION
                                 ---------------

         The Oklahoma Business Corporation Act and Article VI of the Bylaws of
BOK Financial provide BOK Financial with broad powers and authority to indemnify
its directors and officers and the directors and officers of its subsidiaries
and to purchase and maintain insurance for such purposes. Pursuant to such
statutory and Bylaw provisions, BOK Financial has purchased insurance against
certain costs of indemnification of its officers and directors.

         Insofar as indemnification for liabilities arises under the Securities
Act of 1933, in the opinion of the Securities and Exchange Commission, such
indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by BOKF of expenses incurred

                                                              Page ____ of ____.

                                     - 43 -
<PAGE>
 
or paid by a director, officer or controlling person of BOKF in the successful
defense of any action, suit or proceeding) is asserted by such director, officer
or controlling person, BOKF will, unless, in the opinion of its counsel, the
matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction, the question whether such indemnification by it is
against public policy as expressed in the Act and will be governed by the final
adjudication of such issue.

                                  LEGAL OPINION
                                  -------------

         Frederic Dorwart, Esquire, Tulsa, Oklahoma, has rendered an opinion to
BOK Financial (which is filed as an exhibit to the Registration Statement of
which this Prospectus is a part) to the effect that the BOKF Notes offered
hereby are validly issued, fully paid, and nonassessable. Mr. Dorwart is
secretary of BOK Financial, BOKFSub and BOk.

                                     EXPERTS
                                     -------

         The consolidated financial statements of BOK Financial Corporation
incorporated by reference in BOK Financial Corporation's Annual Report (Form 10-
K) for the years ended December 31, 1995, 1994 and 1993 have been audited by
Ernst & Young, LLP, independent auditors, as set forth in their report thereon
included therein and incorporated herein by reference. Such consolidated
financial statements are incorporated herein by reference in reliance upon such
reports given upon the authority of such firms as experts in accounting and
auditing.

         The consolidated financial statements of Park Cities Bancshares, Inc.
for the years ended December 31, 1995, 1994 and 1993 have been audited by
Coopers & Lybrand, L.L.P., as set forth in their report therein and incorporated
herein by reference. Such consolidated financial statements are incorporated
herein by reference in reliance upon such reports given upon the authority of
such firms as experts in accounting and auditing.

                             ADDITIONAL INFORMATION
                             ----------------------

         BOK Financial has filed with the Securities and Exchange Commission
(the "Commission") in Washington, D.C., a Registration Statement on Form S-4 (of
which this Prospectus is a part) under the Securities Act of 1933, as amended,
with respect to the BOKF Financial Common Stock offered hereby. This Prospectus
does not contain all the information set forth in the Registration Statement,
certain portions of which have been omitted as permitted by the rules and
regulations of the Commission. For further information concerning BOK Financial
and the BOKF Common Stock offered hereby, reference is made to the Registration
Statement, and to the exhibits and schedules thereto and the financial
statements filed as a part thereof which may be inspected without charge at the
principal office of the Commission, 450 Fifth Street, N.W., Washington, D.C.
20549, and copies of all or any part of which may be obtained from the
Commission upon payment of the prescribed fees. Statements contained in this
Prospectus as to the contents of any contract or other document are not
necessarily complete, and in each instance such statements are qualified in
their entirety by reference to the copy of such contract or other document filed
as an exhibit to the Registration Statement.

                                                              Page ____ of ____.

                                     - 44 -
<PAGE>
 
                                    EXHIBIT A

                                 PROMISSORY NOTE
                                 ---------------
 
  Amount                          Dallas, Texas                      Date
- ----------                                                         ---------

         FOR VALUE RECEIVED, the undersigned, BOK Financial Corporation, an
Oklahoma corporation ("Maker"), hereby promises to pay to the order of
                       -----
_________________ ("Holder"), at the address of Holder set forth on the
signature page hereof, or at such other address given to Maker by Holder, the
principal sum of ($______________), together with interest, as hereinafter
described.

         This Note has been executed and delivered in connection with that
certain Agreement and Plan of Merger (the "Merger Agreement"), dated
                                           ----------------
______________, by and among Maker, BOKF Merger Corporation Number Five, a Texas
corporation, and Park Cities Bancshares, Inc., a Texas corporation, and
represents all or a portion of the Merger Consideration (as defined in the
Merger Agreement) due to Holder.

         This Note has been issued under an Indenture dated as of __________,
199_, ("Indenture") between the Maker and _________________, as trustee
("Trustee"). The terms of this Note include those stated in the Indenture and
those made part of the Indenture by reference to the Trust Indenture Act of
1939, as amended, as in effect on the date of the Indenture. This Note is
subject to all such terms, and Holder is referred to the Indenture and the Trust
Indenture Act for a statement of such terms. This Note is an unsecured general
obligation of Maker.

         Maker will furnish to any Holder upon written request and without
charge a copy of the Indenture. Requests may be made to BOKF Financial
Corporation, P.O. Box 2300, Tulsa, Oklahoma, 74103-5010 Attn: ______________. ]

         Section 1.  Interest and Payment.
         --------------------------------

         (a) Prior to the occurrence of a default (hereinafter defined),
interest shall be payable on the outstanding principal balance of this Note at a
rate per annum equal to [the Applicable Federal Rate as defined in the Internal
                         ------------------------------------------------------
Revenue Code as being in effect on the Closing Date, as defined in the Merger
- -----------------------------------------------------------------------------
Agreement]. Interest on this Note shall be calculated at a daily rate equal to
- ---------
1/360 of the annual percentage rate which this Note bears, subject to the
provisions hereof limiting interest to the Maximum Lawful Rate (as herein
defined).

         (b) Interest only on this Note shall be due and payable quarterly,
commencing on (1st day of the first calendar quarter after the Closing Date) and
               ------------------------------------------------------------
continuing on the first day of each ____________, ____________, ____________,
and ______________ thereafter until (maturity date selected by Holder) . The
entire outstanding principal balance of this Note and

                                                              Page ____ of ____.

                                     - 45 -
<PAGE>
 
all accrued but unpaid interest thereon shall be due and payable in full on
(maturity date selected by Holder).
- ----------------------------------

         (c) After the occurrence of a default, for so long as such default
remains uncured or upon acceleration by Holder following a default, past due
principal, and past due interest, to the extent permitted by law, shall bear
interest at the lesser of (i) Maximum Lawful Rate or (ii) 15%.

         (d) Maker shall not be entitled to prepay this Note in full or in part
prior to the maturity date hereof without the prior written consent of Holder.

         Section 2.  General Provisions.
         ------------------------------

         Whenever any payment shall be due under this Note on a day which is not
a business day, the date on which such payment is due shall be extended to the
next succeeding business day, and such extension of time shall be included in
the computation of the amount of interest then payable.

         All principal, interest and other sums payable under this Note shall be
paid, not later than two o'clock p.m. (Dallas, Texas time), on the day when due,
in immediately available funds in lawful money of the United States of America.
Any payment under this Note other than in the required amount and in good,
unrestricted U.S. funds immediately available to the holder hereof shall not,
regardless of any receipt or credit issued therefor, constitute payment until
the required amount is actually received by the holder hereof in such funds and
shall be made and accepted subject to the condition that any check or draft may
be handled for collection in accordance with the practice of the collection bank
or banks.

         All payments made as scheduled on this Note shall be applied, to the
extent thereof, first to accrued but unpaid interest and the balance to unpaid
principal.

         The occurrence of any one of the following shall be a default under
this Note (a "default"):
              -------

         (a) Maker shall fail to pay when due any principal of or interest on
this Note; or

         (b) Maker (1) (i) executes an assignment for the benefit of creditors,
or takes any action in furtherance thereof; or (ii) admits in writing its
inability to pay, or fails to pay, its debts generally as they become due; or
(iii) as a debtor, files a petition, case, proceeding or other action pursuant
to, or voluntarily seeks the benefit or benefits of any debtor relief law, or
takes any action in furtherance thereof; or (iv) seeks the appointment of a
receiver, trustee, custodian or liquidator of any significant portion of its
property; or (v) becomes subject to any cease-and- desist or other order issued
by, or a party to any written agreement or memorandum of understanding with, or
is a recipient of any extraordinary supervisory letter from, any regulatory
agency; or (2) suffers the filing of a petition, case, proceeding or other
action against it as a debtor under any debtor relief law or seeking appointment
of a receiver, trustee, custodian or liquidator of any significant portion of
its other property, and (i) admits, acquiesces in or fails

                                                              Page ____ of ____.

                                     - 46 -
<PAGE>
 
to contest diligently the material allegations thereof; or (ii) the petition,
case, proceeding or other action results in entry of any order for relief or
order granting relief sought against it, or (iii) in a proceeding under Title 11
of the United States Code, the case is converted from one chapter to another; or
(iv) fails to have the petition, case, proceeding or other action permanently
dismissed or discharged on or before the earlier of trial thereon or sixty (60)
days next following the date of its filing; or (3) conceals, removes, or permits
to be concealed or removed, any part of its property, with intent to hinder,
delay or defraud its creditors or any of them, or makes or suffers a transfer of
any of its property which may be fraudulent under any bankruptcy, fraudulent
conveyance or similar law; or makes any transfer of its property to or for the
benefit of a creditor at a time when other creditors similarly situated have not
been paid; or

         (c) There shall occur (i) a change in control of Maker, Park Cities
Bancshares, Inc., or First National Bank of Park Cities; (ii) a sale of all or
substantially all of the assets of any such entity; or (iii) the liquidation or
dissolution of any such entity. For the purpose of this Note, a change of
control shall be deemed to have occurred when and only when those persons and
entities who are presently in control of Maker (within the meaning of Rule 405
of the Securities and Exchange Commission) become no longer in control of Maker
(within the meaning of said Rule 405).

Upon the occurrence of a default, the holder hereof shall have the right to
declare the unpaid principal balance and accrued but unpaid interest on this
Note at once due and payable (and upon such declaration, the same shall be at
once due and payable), and to exercise any rights, powers and remedies available
to Holder under this Note, or at law or in equity.

         Neither the failure by the holder hereof to exercise, nor delay by the
holder hereof in exercising, the right to accelerate the maturity of this Note
or any other right, power or remedy upon any default shall be construed as a
waiver of such default or as a waiver of the right to exercise any such right,
power or remedy at any time. No single or partial exercise by the holder hereof
of any right, power or remedy shall exhaust the same or shall preclude any other
or further exercise thereof, and every such right, power or remedy may be
exercised at any time and from time to time. All rights and remedies provided
for in this Note are cumulative of each other and of any and all other rights
and remedies existing at law or in equity, and the holder hereof shall, in
addition to the rights and remedies provided herein, be entitled to avail itself
of all such other rights and remedies as may now or hereafter exist at law or in
equity for the collection of the indebtedness owing hereunder, and the resort to
any right or remedy provided for hereunder or provided for by law or in equity
shall not prevent the concurrent or subsequent employment of any other
appropriate rights or remedies. Without limiting the generality of the foregoing
provisions, the acceptance by the holder hereof from time to time of any payment
under this Note which is past due or which is less than the payment in full of
all amounts due and payable at the time of such payment, shall not (i)
constitute a waiver of or impair or extinguish the rights of the holder hereof
to accelerate the maturity of this Note or to exercise any other right, power or
remedy at the time or at any subsequent time, or nullify any prior exercise of
any such right, power or remedy, or (ii) constitute a waiver of the requirement
of punctual payment and performance, or a novation in any respect.

                                                              Page ____ of ____.

                                     - 47 -
<PAGE>
 
         If any holder of this Note retains an attorney in connection with any
default or at maturity or to collect, enforce or defend this Note in any lawsuit
or in any probate, reorganization, bankruptcy or other proceeding, or if any
holder of this Note sues Maker in connection with this Note, then Maker agrees
to pay to holder, all costs and expenses incurred by such prevailing party in
any such suit or proceeding, including attorneys' fees.

         It is the intent of Holder and Maker to conform to and contract in
strict compliance with applicable usury law from time to time in effect. All
agreements between Holder or any other holder hereof and Maker are hereby
limited by the provisions of this paragraph which shall override and control all
such agreements, whether now existing or hereafter arising and whether written
or oral. In no way, nor in any event or contingency (including but not limited
to prepayment, default, demand for payment, or acceleration of the maturity of
any obligation), shall the rate of interest taken, reserved, contracted for,
charged or received under this Note or otherwise, exceed the maximum rate of
interest permitted by applicable law (the "Maximum Lawful Rate"). If, from any
                                           -------------------
possible construction of any document, interest would otherwise be payable in
excess of the Maximum Lawful Rate, any such construction shall be subject to the
provisions of this paragraph and such document shall be automatically reformed
and the interest payable shall be automatically reduced to the Maximum Lawful
Rate, without the necessity of execution of any amendment or new document. If
the holder hereof shall ever receive anything of value which is characterized as
interest under applicable law and which would apart from this provision be in
excess of the Maximum Lawful Rate, an amount equal to the amount which would
have been excessive interest shall, without penalty, be applied to the reduction
of the principal amount owing on the indebtedness evidenced hereby in the
inverse order of its maturity and not to the payment of interest, or refunded to
Maker or the other payor thereof if and to the extent such amount which would
have been excessive exceeds such unpaid principal. The right to accelerate the
maturity of this Note does not include the right to accelerate any interest
which has not otherwise accrued on the date of such acceleration, and the holder
hereof does not intend to charge or receive any unearned interest in the event
of acceleration. All interest paid or agreed to be paid to the holder hereof
shall, to the extent permitted by applicable law, be amortized, prorated,
allocated and spread throughout the full stated term (including any renewal or
extension) of such indebtedness so that the amount of interest on account of
such indebtedness does not exceed the maximum nonusurious amount permitted by
applicable law. As used in this paragraph, the term "applicable law" shall mean
the laws of the State of Texas or the federal laws of the United States,
whichever laws allow the greater interest, as such laws now exist or may be
changed or amended or come into effect in the future.

         Maker and all sureties, endorsers, guarantors and any other party now
or hereafter liable for the payment of this Note in whole or in part, hereby
severally waive demand, presentment for payment, notice of dishonor and of
nonpayment, protest, notice of protest, notice of intent to accelerate, notice
of acceleration and all other notices of any kind.

         This Note may not be changed, amended or modified except in a writing
expressly intended for such purpose and executed by the party against whom
enforcement of the change, amendment or modification is sought.

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                                     - 48 -
<PAGE>
 
         All of the covenants, stipulations, promises, and agreements contained
in this Note by or on behalf of Maker shall bind its successors and assigns,
whether so expressed or not.

         THIS NOTE, AND ITS VALIDITY, ENFORCEMENT AND INTERPRETATION, SHALL BE
GOVERNED BY TEXAS LAW (WITHOUT REGARD TO ANY CONFLICT OF LAWS PRINCIPLES) AND
APPLICABLE UNITED STATES FEDERAL LAW.

         Time shall be of the essence in this Note with respect to all of
Maker's obligations hereunder.

         THIS NOTE REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES.

         THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

         THIS NOTE AND ALL PRINCIPAL AND INTEREST DUE THEREUNDER IS REGISTERED
ON THE BOOKS OF THE MAKER AND CAN ONLY BE TRANSFERRED BY SURRENDER TO THE MAKER
AND REISSUE TO THE TRANSFEREE.

         IN WITNESS WHEREOF, Maker has duly executed this Note to be effective
as of the day and year first above written.

                                       MAKER:                                   
                                       -----                                    
                                                                                
ADDRESS OF HOLDER:                     BOK FINANCIAL CORPORATION,               
- -----------------                      
                                       an Oklahoma corporation                  
                                                                                
- ------------------------                                                        
                                       By:                                      
- ------------------------                  ------------------------------------- 
                                       Name:                                    
- ------------------------                    ----------------------------------- 
                                       Title:                                   
- ------------------------                     ----------------------------------








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                                     - 49 -
<PAGE>
 
                                    EXHIBIT B

                                    ARTICLES
                                    --------

                         TEXAS BUSINESS CORPORATION ACT

Art. 5.11. Rights of Dissenting Shareholders in the Event of Certain Corporate
           Actions

           A. Any shareholder of a domestic corporation shall have the right to
dissent from any of the following corporate actions:

           (1) Any plan of merger to which the corporation is a party if
shareholder approval is required by Article 5.03 or 5.16 of this Act and the
shareholder holds shares of a class or series that was entitled to vote thereon
as a class or otherwise;

           (2) Any sale, lease, exchange or other disposition (not including any
pledge, mortgage, deed of trust or trust indenture unless otherwise provided in
the articles of incorporation) of all, or substantially all, the property and
assets, with or without good will, of a corporation requiring the special
authorization of the shareholders as provided by this Act;

           (3) Any plan of exchange pursuant to Article 5.02 of this Act in
which the shares of the corporation of the class or series held by the
shareholder are to be acquired.

           B. Notwithstanding the provisions of Section A of this Article, a
shareholder shall not have the right to dissent from any plan of merger in which
there is a single surviving or new domestic or foreign corporation, or from any
plan of exchange, if (1) the shares held by the shareholder are part of a class
shares of which are listed on a national securities exchange, or are held of
record by not less than 2,000 holders, on the record date fixed to determine the
shareholders entitled to vote on the plan of merger or the plan of exchange, and
(2) the shareholder is not required by the terms of the plan of merger or the
plan of exchange to accept for his shares any consideration other than (a)
shares of a corporation that, immediately after the effective time of the merger
or exchange, will be part of a class or series of shares of which are (i)
listed, or authorized for listing upon official notice of issuance, on a
national securities exchange, or (ii) held of record by not less than 2,000
holders, and (b) cash in lieu of fractional shares otherwise entitled to be
received.

Art. 5.12. Procedure for Dissent by Shareholders as to Said Corporate Actions

           A. Any shareholder of any domestic corporation who has the right to
dissent from any of the corporate actions referred to in Article 5.11 of this
Act may exercise that right to dissent only by complying with the following
procedures:

           (1)(a) With respect to proposed corporate action that is submitted to
a vote of shareholders at a meeting, the shareholder shall file with the
corporation, prior to the meeting, a written objection to the action, setting
out that the shareholder's right to dissent will be exercised if the action is
effective and giving the shareholder's address, to which notice thereof


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                                     - 50 -
<PAGE>
 
shall be delivered or mailed in that event. If the action is effected and the
shareholder shall not have voted in favor of the action, the corporation, in the
case of action other than a merger, or the surviving or new corporation (foreign
or domestic) or other entity that is liable to discharge the shareholder's right
of dissent, in the case of a merger, shall, within ten (10) days after the
action is effected, deliver or mail to the shareholder written notice that the
action has been effected, and the shareholder may, within ten (10) days from the
delivery or mailing of the notice, make written demand on the existing,
surviving, or new corporation (foreign or domestic) or other entity, as the case
may be, for payment of the fair value of the shareholder's shares. The fair
value of the shares shall be the value thereof as of the day immediately
preceding the meeting, excluding any appreciation or depreciation in
anticipation of the proposed action. The demand shall state the number and class
of the shares owned by the shareholder and the fair value of the shares as
estimated by the shareholder. Any shareholder failing to make demand within the
ten (10) day period shall be bound by the action.

           (b) With respect to proposed corporate action that is approved
pursuant to Section A of Article 9.10 of this Act, the corporation, in the case
of action other than a merger, and the surviving or new corporation (foreign or
domestic) or other entity that is liable to discharge the shareholder's right of
dissent, in the case of a merger, shall, within ten (10) days after the date the
action is effected, mail to each shareholder of record as of the effective date
of the action notice of the fact and date of the action and that the shareholder
may exercise the shareholder's right to dissent from the action. The notice
shall be accompanied by a copy of this Article and any articles or documents
filed by the corporation with the Secretary of State to effect the action. If
the shareholder shall not have consented to the taking of the action, the
shareholder may, within twenty (20) days after the mailing of the notice, make
written demand on the existing, surviving, or new corporation (foreign or
domestic) or other entity, as the case may be, for payment of the fair value of
the shareholder's shares. The fair value of the shares shall be the value
thereof as of the date the written consent authorizing the action was delivered
to the corporation pursuant to Section A of Article 9.10 of this Act, excluding
any appreciation or depreciation in anticipation of the action. The demand shall
state the number and class of shares owned by the dissenting shareholder and the
fair value of the shares as estimated by the shareholder. Any shareholder
failing to make demand within the twenty (20) day period shall be bound by the
action.

           (2) Within twenty (20) days after receipt by the existing, surviving,
or new corporation (foreign or domestic) or other entity, as the case may be, of
a demand for payment made by a dissenting shareholder in accordance with
Subsection (1) of this Section, the corporation (foreign or domestic) or other
entity shall deliver or mail to the shareholder a written notice that shall
either set out that the corporation (foreign or domestic) or other entity
accepts the amount claimed in the demand and agrees to pay that amount within
ninety (90) days after the date on which the action was effected, and, in the
case of shares represented by certificates, upon the surrender of the
certificates duly endorsed, or shall contain an estimate by the corporation
(foreign or domestic) or other entity of the fair value of the shares, together
with an offer to pay the amount of that estimate within ninety (90) days after
the date on which the action was effected, upon receipt of notice within sixty
(60) days after that date from the shareholder that the shareholder agrees to
accept that amount and, in the case of shares represented by certificates, upon
the surrender of the certificates duly endorsed.

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                                     - 51 -
<PAGE>
 
           (3) If, within sixty (60) days after the date on which the corporate
action was effected, the value of the shares is agreed upon between the
shareholder and the existing, surviving, or new corporation (foreign or
domestic) or other e entity, as the case may be, payment for the shares shall be
made within ninety (90) days after the date on which the action was effected
and, in the case of shares represented by certificates, upon surrender of the
certificates duly endorsed. Upon payment of the agreed value, the shareholder
shall cease to have any interest in the shares or in the corporation.

           B. If, within the period of sixty (60) days after the date on which
the corporate action was effected, the shareholder and the existing, surviving,
or new corporation (foreign or domestic) or other entity, as the case may be, do
not so agree, then the shareholder or the corporation (foreign or domestic) or
other entity may, within sixty (60) days after the expiration of the sixty (60)
day period, file a petition in any court of competent jurisdiction in the county
in which the principal office of the domestic corporation is located, asking for
a finding and determination of the fair value of the shareholder's shares. Upon
the filing of any such petition by the shareholder, service of a copy thereof
shall be made upon the corporation (foreign or domestic) or other entity, which
shall, within ten (10) days after service, file in the office of the clerk of
the court in which the petition was filed a list containing the names and
addresses of all shareholders of the domestic corporation who have demanded
payment for their shares and with whom agreements as to the value of their
shares have not been reached by the corporation (foreign or domestic) or other
entity. If the petition shall be filed by the corporation (foreign or domestic)
or other entity, the petition shall be accompanied by such a list. The clerk of
the court shall give notice of the time and place fixed for the hearing of the
petition by registered mail to the corporation (foreign or domestic) or other
entity and to the shareholders named on the list at the addresses therein
stated. The forms of the notices by mail shall be approved by the court. All
shareholders thus notified and the corporation (foreign or domestic) or other
entity shall thereafter be bound by the final judgment of the court.

           C. After the hearing of the petition, the court shall determine the
shareholders who have complied with the provisions of this Article and have
become entitled to the valuation of and payment for their shares, and shall
appoint one or more qualified appraisers to determine that value. The appraisers
shall have power to examine any of the books and records of the corporation the
shares of which they are charged with the duty of valuing, and they shall make a
determination of the fair value of the shares upon such investigation as to them
may seem proper. The appraisers shall also afford a reasonable opportunity to
the parties interested to submit to them pertinent evidence as to the value of
the shares. The appraisers shall also have such power and authority as may be
conferred on Masters in Chancery by the Rules of Civil Procedure or by the order
of their appointment.

           D. The appraisers shall determine the fair value of the shares of the
shareholders adjudged by the court to be entitled to payment for their shares
and shall file their report of that value in the office of the clerk of the
court. Notice of the filing of the report shall be given by the clerk to the
parties in interest. The report shall be subject to exceptions to be heard
before the court both upon the law and the facts. The court shall by its
judgment determine the fair value of the shares of the shareholders entitled to
payment for their shares and shall direct the payment of that value by the
existing, surviving, or new corporation (foreign or domestic) or

                                                              Page ____ of ____.

                                     - 52 -
<PAGE>
 
other entity, together with interest thereon, beginning 91 days after the date
on which the applicable corporate action from which the shareholder elected to
dissent was effected to the date of such judgment, to the shareholders entitled
to payment. The judgment shall be payable to the holders of uncertificated
shares immediately but to the holders of shares represented by certificates only
upon, and simultaneously with, the surrender to the existing, surviving, or new
corporation (foreign or domestic) or other entity, as the case may be, of duly
endorsed certificates for those shares. Upon payment of the judgment, the
dissenting shareholders shall cease to have any interest in those shares or in
the corporation. The court shall allow the appraisers a reasonable fee as court
costs, and all court costs shall be allotted between the parties in the manner
that the court determines to be fair and equitable.

           E. Shares acquired by the existing, surviving, or new corporation
(foreign or domestic) or other entity, as the case may be, pursuant to the
payment of the agreed value of the shares or pursuant to payment of the judgment
entered for the value of the shares, as in this Article provided, shall, in the
case of a merger, be treated as provided in the plan of merger and, in all other
cases, may be held and disposed of by the corporation as in the case of other
treasury shares.

           F. The provisions of this Article shall not apply to a merger if, on
the date of the filing of the articles of merger, the surviving corporation is
the owner of all the outstanding shares of the other corporations, domestic or
foreign, that are parties to the merger.

           G. In the absence of fraud in the transaction, the remedy provided by
this Article to a shareholder objecting to any corporate action referred to in
Article 5.11 of this Act is the exclusive remedy for the recovery of the value
of his shares or money damages to the shareholder with respect to the action. If
the existing, surviving, or new corporation (foreign or domestic) or other
entity, as the case may be, complies with the requirements of this Article, any
shareholder who fails to comply with the requirements of this Article shall not
be entitled to bring suit for the recovery of the value of his shares or money
damages to the shareholder with respect to the action.

Art. 5.13. Provisions Affecting Remedies of Dissenting Shareholders

           A. Any shareholder who has demanded payment for his shares in
accordance with either Article 5.12 or 5.16 of this Act shall not thereafter be
entitled to vote or exercise any other rights of a shareholder except the right
to receive payment for his shares pursuant to the provisions of those articles
and the right to maintain an appropriate action to obtain relief on the ground
that the corporate action would be or was fraudulent, and the respective shares
for which payment has been demanded shall not thereafter be considered
outstanding for the purposes of any subsequent vote of shareholders.

           B. Upon receiving a demand for payment from any dissenting
shareholder, the corporation shall make an appropriate notation thereof in its
shareholder records. Within twenty (20) days after demanding payment for his
shares in accordance with either Article 5.12 or 5.16 of this Act, each holder
of certificates representing shares so demanding payment shall submit such
certificates to the corporation for notation thereon that such demand has been
made. The


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                                     - 53 -
<PAGE>
 
failure of holders of certificated shares to do so shall, at the option of the
corporation, terminate such shareholder's rights under Articles 5.12 and 5.16 of
this Act unless a court of competent jurisdiction for good and sufficient cause
shown shall otherwise direct. If uncertificated shares for which payment has
been demanded or shares represented by a certificate on which notation has been
so made shall be transferred, any new certificate issued therefor shall bear
similar notation together with the name of the original dissenting holder of
such shares and a transferee of such shares shall acquire by such transfer no
rights in the corporation other than those which the original dissenting
shareholder had after making demand for payment of the fair value thereof.

           C. Any shareholder who has demanded payment for his shares in
accordance with either Article 5.12 or 5.16 of this Act may withdraw such demand
at any time before payment for his shares or before any petition has been filed
pursuant to Article 5.12 or 5.16 of this Act asking for a finding and
determination of the fair value of such shares, but no such demand may be
withdrawn after such payment has been made or, unless the corporation shall
consent thereto, after any such petition has been filed. If, however, such
demand shall be withdrawn as hereinbefore provided, or if pursuant to Section B
of this Article the corporation shall terminate the shareholder's rights under
Article 5.12 or 5.16 of this Act, as the case may be, or if no petition asking
for a finding and determination of fair value of such shares by a court shall
have been filed within the time provided in Article 5.12 or 5.16 of this Act, as
the case may be, or if after the hearing of a petition filed pursuant to Article
5.12 or 5.16, the court shall determine that such shareholder is not entitled to
the relief provided by those articles, then, in any such case, such shareholder
and all persons claiming under him shall be conclusively presumed to have
approved and ratified the corporate action from which he dissented and shall be
bound thereby, the right of such shareholder to be paid the fair value of his
shares shall cease, and his status as a shareholder shall be restored without
prejudice to any corporate proceedings which may have been taken during the
interim, and such shareholder shall be entitled to receive any dividends or
other distributions made to shareholders in the interim.


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                                     - 54 -
<PAGE>
 
                                    EXHIBIT C

         Agreement and Plan of Merger Among BOK Financial Corporation, BOK
         Merger Corporation Number Five and Park Cities Bancshares, Inc. dated
         October 3, 1996 (Filed herewith).


                                   EXHIBIT D

Trust Indenture For BOK Notes Payable To Electing Shareholders of Park Cities 
(Filed herewith)


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                                     - 55 -
<PAGE>
 
                                    PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS
                    --------------------------------------

Item 20.  Indemnification of Directors and Officers
          -----------------------------------------

      The Oklahoma Business Corporation Act and Article VI of the Bylaws of BOK 
Financial provided BOK Financial with broad powers and authority to indemify its
directors and officers and directors and officers of its subsidiaries and to 
purchase and maintain insurance for such purposes. Pursuant to such statutory 
and Bylaw provisions, BOK Financial has purchased insurance against certain
costs of indemnification of its officers and directors and officers and
directors of its subsidiaries.

Item 21.   Exhibits and Financial Statement Schedules.
           ------------------------------------------
       (a)    Exhibits.

Exhibit #  Description of Exhibit
- ---------  ----------------------  

3.0        The Articles of Incorporation of BOK Financial are incorporated by
           reference to (i) Amended and Restated Certificate of Incorporation of
           BOK Financial filed with the Oklahoma Secretary of State on May 28,
           1991, filed as Exhibit 3.0 to S-1 Registration Statement No. 33-
           90450, and (ii) Amendment attached as Exhibit A to Information
           Statement and Prospectus Supplement filed November 20, 1991.

3.1        Bylaws of BOK Financial are incorporated by reference to Exhibit 3.1
           of S-1 Registration Statement No. 33-90450.

4.0        Instruments defining the rights of security holders, including
           debentures.

4.1        The rights of the holders of the Common Stock and Preferred Stock of
           BOK Financial are set forth in its Certificate of Incorporation.

4.2        Form of BOKF Notes Payable to Electing Shareholders of Park Cities
           is Exhibit A to Agreement and Plan of Merger dated October 3, 1996
           (Exhibit 10.23 hereto).

4.3        Trust Indenture for BOKF Notes Payable to Electing Shareholders of
           Park Cities (Filed herewith).

5.0        Opinion of Frederic Dorwart dated November 13, 1996 (Filed herewith).


                                                              Page ____ of ____.

                                   Part II - 1
<PAGE>
 
10.0       Purchase and Sale Agreement dated October 25, 1990, among BOK
           Financial, Kaiser, and the FDIC, incorporated by reference to Exhibit
           2.0 of S-1 Registration Statement No. 33-90450.

10.1       Amendment to Purchase and Sale Agreement effective March 29, 1991,
           among BOK Financial, Kaiser, and the FDIC, incorporated by reference
           to Exhibit 2.2 of S-1 Registration Statement No. 33-90450.

10.2       Letter agreement dated April 12, 1991, among BOK Financial,
           Kaiser, and the FDIC, incorporated by reference to Exhibit 2.3 of
           S-1 Registration Statement No. 33-90450.

10.3       Second Amendment to Purchase and Sale Agreement effective April 15,
           1991, among BOK Financial, Kaiser, and the FDIC, incorporated by
           reference to Exhibit 2.4 of S-1 Registration Statement No. 33-90450.

10.4       Employment agreements.

10.4(a)    Employment Agreement between BOk and Stanley A. Lybarger,
           incorporated by reference to Exhibit 10.4(a) of Form 10-K for the
           fiscal year ended December 31, 1991.

10.5       Director indemnification agreement dated June 30, 1987, between BOk
           and Kaiser incorporated by reference to Exhibit 10.5 of S-1
           Registration Statement No. 33-90450. Substantially similar director
           indemnification agreements were executed between BOk and the
           following:

                                              Date of Agreement

                   James E. Barnes            June 30, 1987
                   William H. Bell            June 30, 1987
                   James S. Boese             June 30, 1987
                   Dennis L. Brand            June 30, 1987
                   Chester E. Cadieux         June 30, 1987
                   William B. Cleary          June 30, 1987
                   Glenn A. Cox               June 30, 1987
                   William E. Durrett         June 30, 1987
                   Leonard J. Eaton, Jr.      June 30, 1987
                   William B. Fader           December 5, 1990
                   Gregory J. Flanagan        June 30, 1987
                   Jerry L. Goodman           June 30, 1987
                   David A. Hentschel         July 7, 1987
                   Philip N. Hughes           July 8, 1987
                   Thomas J. Hughes, III      June 30, 1987
                   William G. Kerr            June 30, 1987
                   Philip C. Lauinger, Jr.    June 30, 1987
                   Stanley A. Lybarger        December 5, 1990



                                                              Page ____ of ____.

                                  Part II - 2
<PAGE>
 
                   Patricia McGee Maino       June 30, 1987
                   Robert L. Parker, Sr.      June 30, 1987
                   James A. Robinson          June 30, 1987
                   William P. Swiech          June 30, 1987

10.6       Capitalization and Stock Purchase Agreement dated May 20, 1991,
           between BOK Financial and Kaiser, incorporated by reference to
           Exhibit 10.6 of S-1 Registration Statement No. 33-90450.

10.7       BOK Financial Corporation 1991 Special Stock Option Plan,
           incorporated by reference to Exhibit 4.0 of S-8 Registration
           Statement No. 33-44122.

10.7.1     BOK Financial Corporation 1992 Stock Option Plan, incorporated by
           reference to Exhibit 4.0 of S-8 Registration Statement No. 33-55312.

10.7.2     BOK Financial Corporation 1993 Stock Option Plan, incorporated by
           reference to Exhibit 4.0 of S-8 Registration Statement No. 33-70102.

10.7.3     BOK Financial Corporation 1994 Stock Option Plan, incorporated by
           reference to Exhibit 4.0 of S-8 Registration Statement No. 33-79834.

10.7.4     BOK Financial Corporation 1994 Stock Option Plan (Typographical
           Error Corrected January 16, 1995), incorporated by reference to
           Exhibit 10.7.4 of Form 10-K for the fiscal year ended December 31,
           1994.

10.7.5     BOK Financial Corporation Directors' Stock Compensation Plan,
           incorporated by reference to Exhibit 4.0 of S-8 Registration
           Statement No. 33-79836.

10.7.6     Bank of Oklahoma Thrift Plan (Amended and Restated Effective as of
           January 1, 1995), incorporated by reference to Exhibit 10.7.6 of
           Form 10-K for the year ended December 31, 1994.

10.7.7     Trust Agreement for Bank of Oklahoma Thrift Plan (December 20,
           1994), incorporated by reference to Exhibit 10.7.7 of Form 10-K
           for the year ended December 31, 1994.

10.8       Lease Agreement between One Williams Center Co. and National Bank of
           Tulsa (predecessor to BOk) dated June 18, 1974, incorporated by
           reference to Exhibit 10.9 of S-1 Registration Statement No. 33-90450.

10.9       Lease Agreement between Security Capital Real Estate Fund and BOk
           dated January 1, 1988, incorporated by reference to Exhibit 10.10 of
           S-1 Registration Statement No. 33-90450.

10.10      Asset Purchase Agreement (OREO and other assets) between BOk and
           Phi-Lea-Em Corporation dated April 30, 1991, incorporated by
           reference to Exhibit 10.11 of S-1 Registration Statement No. 
           33-90450.

                                                              Page ____ of ____.

                                   Part II - 3
<PAGE>
 
10.11      Asset Purchase Agreement (Tanker Assets) between BOk and Green
           River Exploration Company dated April 30, 1991, incorporated by
           reference to Exhibit 10.12 of S-1 Registration Statement No.
           33-90450.

10.12      Asset Purchase Agreement (Recovery Rights) between BOk and Kaiser
           dated April 30, 1991, incorporated by reference to Exhibit 10.13 of 
           S-1 Registration Statement No. 33-90450.

10.13      Purchase and Assumption Agreement dated A 7, 1992 among First
           Gibraltar Bank, FSB, Fourth Financial Corporation and BOk, as
           amended, incorporated by reference to Exhibit 10.14 of Form 10-K
           for the fiscal year ended December 31, 1992.

10.13.1    Allocation Agreement dated A 7, 1992 between BOk and Fourth Financial
           Corporation, incorporated by reference to Exhibit 10.14.1 of Form 10-
           K for the fiscal year ended December 31, 1992.

10.14      Merger Agreement among BOK Financial, BOKF Merger Corporation
           Number Two, Brookside Bancshares, Inc., The Shareholders of
           Brookside Bancshares, Inc. and Brookside State Bank dated December
           22, 1992, as amended, incorporated by reference to Exhibit 10.15
           of Form 10-K for the fiscal year ended December 31, 1992.

10.14.1    Agreement to Merge between BOk and Brookside State Bank dated
           January 27, 1993, incorporated by reference to Exhibit 10.15.1 of
           Form 10-K for the fiscal year ended December 31, 1992.

10.15      Merger Agreement among BOK Financial, BOKF Merger Corporation
           Number Three, Sand Springs Bancshares, Inc., The Shareholders of
           Sand Springs Bancshares, Inc. and Sand Springs State Bank dated
           December 22, 1992, as amended, incorporated by reference to
           Exhibit 10.16 of Form 10-K for the fiscal year ended December 31,
           1992.

10.15.1    Agreement to Merge between BOk and Sand Springs State Bank dated
           January 27, 1993, incorporated by reference to Exhibit 10.16.1 of
           Form 10-K for the fiscal year ended December 31, 1992.

10.16      Partnership Agreement between Kaiser-Francis Oil Company and BOK
           Financial dated December 1, 1992, incorporated by reference to
           Exhibit 10.16 of Form 10-K for the fiscal year ended December 31,
           1993.

10.16.1    Amendment to Partnership Agreement between Kaiser-Francis Oil
           Company and BOK Financial dated May 17, 1993, incorporated by
           reference to Exhibit 10.16.1 of Form 10-K for the fiscal year
           ended December 31, 1993.

10.17      Purchase and Assumption Agreement between BOk and FDIC, Receiver
           of Heartland Federal Savings and Loan Association dated October 9,
           1993, incorporated by

                                                              Page ____ of ____.

                                   Part II - 4
<PAGE>
 
           reference to Exhibit 10.17 of Form 10-K for the fiscal year ended
           December 31, 1993.

10.18      Merger Agreement among BOk, Plaza National Bank and The
           Shareholders of Plaza National Bank dated December 20, 1993,
           incorporated by reference to Exhibit 10.18 of Form 10-K for the
           fiscal year ended December 31, 1993.

10.18.1    Amendment to Merger Agreement among BOk, Plaza National Bank and
           The Shareholders of Plaza National Bank dated January 14, 1994,
           incorporated by reference to Exhibit 10.18.1 of Form 10-K for the
           fiscal year ended December 31, 1993.

10.19      Stock Purchase Agreement between Texas Commerce Bank, National
           Association and BOk dated March 11, 1994, incorporated by
           reference to Exhibit 10.19 of Form 10-K for the fiscal year ended
           December 31, 1993.

10.20      Merger Agreement Among BOK Financial Corporation, BOKF Merger
           Corporation Number Four, Citizens Holding, The Shareholders of
           Citizens Holding, Citizens Bank and Trust of Muskogee and Citizens
           Bank of Northwest Arkansas, effective as of May 11, 1994,
           incorporated by reference to Exhibit 10.20 of Form 10-K for fiscal
           year ended December 31, 1994.

10.21      Merger Agreement Among Northwest Bank of Enid, Bank of Oklahoma,
           National Association, and The Shareholders of Northwest Bank of
           Enid, effective as of May 16, 1994, incorporated by reference to
           Exhibit 10.21 of Form 10-K for fiscal year ended December 31,
           1994.

10.22      Agreement to Merge Citizens Bank into Bank of Oklahoma, National
           Association, dated July 18, 1994, incorporated by reference to
           Exhibit 10.22 of Form S-4 Registration Statement No. 33-82812.

10.23      Agreement and Plan of Merger Among BOK Financial Corporation, BOK
           Merger Corporation Number Five and Park Cities Bancshares, Inc. dated
           October 3, 1996 (Filed herewith).

11.0       Statement regarding the computation of per share earnings,
           incorporated by reference to Exhibit 11.0 of Form 10-K for the
           fiscal year ended December 31, 1995.

13.0       Annual Report to Shareholders for the fiscal year ended December
           31, 1995, incorporated by reference to Exhibit 13.0 of Form 10-K
           for the fiscal year ended December 31, 1995. The report, except
           for those portions thereof which were expressly incorporated by
           reference in the filing, was furnished for the information of the
           Commission and was not deemed to be "filed" as part of the Annual
           Report on Form 10-K.

13.1       BOKF Financial Annual Report on Form 10-K for the fiscal year ended
           December 31, 1995 (Filed herewith).

                                                              Page ____ of ____.

                                   Part II - 5
<PAGE>
 
13.2       Quarterly Report on Form 10-Q for the fiscal quarter ended September
           30, 1996 filed with the Commission on November 13, 1996, incorporated
           by reference.

21.0       Subsidiaries of BOK Financial, incorporated by reference to Exhibit
           21.0 of Form 10-K for the fiscal year ended December 31, 1995.

23.0       Consent of Independent Auditors.

23.1       Consent of Independent Auditors - Ernst & Young, LLP (Filed
           herewith).

23.2       Consent of Independent Auditors - Coopers & Lybrand, L.L.P. (Filed
           herewith).

99.0       Additional Exhibits.

99.1       Undertakings incorporated by reference into S-8 Registration
           Statement No. 33-44121 for the Bank of Oklahoma Master Thrift Plan
           and Trust, incorporated by reference to Exhibit 99.1 of Form 10-K for
           the fiscal year ended December 31, 1993.

99.2       Undertakings incorporated by reference into S-8 Registration
           Statement No. 33-44122 for the BOK Financial Corporation 1991 Special
           Stock Option Plan, incorporated by reference to Exhibit 99.2 of Form
           10-K for the fiscal year ended December 31, 1993.

99.3       Undertakings incorporated by reference into S-8 Registration
           Statement No. 33-55312 for the BOK Financial Corporation 1992 Stock
           Option Plan, incorporated by reference to Exhibit 99.3 of Form 10-K
           for the fiscal year ended December 31, 1993.

99.4       Undertakings incorporated by reference into S-8 Registration
           Statement No. 33-70102 for BOK Financial Corporation 1993 Stock
           Option Plan, incorporated by reference to Exhibit 99.4 of Form 10-K
           for the fiscal year ended December 31, 1993.

99.5       Undertakings incorporated by reference into S-8 Registration
           Statement No. 33-79834 for BOK Financial Corporation 1994 Stock
           Option Plan, incorporated by reference to Exhibit 99.5 of Form 10-K
           for the fiscal year ended December 31, 1994.

99.6       Undertakings incorporated by reference into S-8 Registration
           Statement No. 33-79836 for BOK Financial Corporation Directors' Stock
           Compensation Plan, incorporated by reference to Exhibit 99.6 of Form
           10-K for the fiscal year ended December 31, 1994.

           (b)      Financial Statement Schedules.

           All schedules either are not applicable or the information
           required thereby is included in the financial statements or notes
           thereto.

                                                              Page ____ of ____.

                                   Part II - 6
<PAGE>
 
Item 22.   Undertakings.
           ------------

       Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

       The Registrant hereby undertakes:

       (1)   To file, during any period in which offers or sales are being
             made, a post-effective amendment to this Registration
             Statement:

             (i)      To include any Prospectus required by section 10(a)(3) of
                      the Securities Act of 1933;

             (ii)     To reflect in the Prospectus any facts or events arising
                      after the effective date of the Registration Statement (or
                      the most recent post-effective amendment thereof) which,
                      individually or in the aggregate, represent a fundamental
                      change in the information set forth in the Registration
                      Statement; and,

             (iii)    To include any material information with respect to
                      the plan of distribution not previously disclosed in
                      the Registration Statement or any material change to
                      such information in the Registration Statement.

       (2)   That, for the purpose of determining any liability under the
             Securities Act of 1933, each such post-effective amendment shall be
             deemed to be a new Registration Statement relating to the
             securities offered therein, and the offering of such securities at
             that time shall be deemed to be the initial bona fide offering
             thereof.

       (3)   To remove from registration by means of a post-effective
             amendment any of the securities being registered which remain
             unsold at the termination of the offering.



                                                              Page ____ of ____.


                                   Part II - 7
<PAGE>
 
                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement or Amendment to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Tulsa,
State of Oklahoma, on November 13, 1996.

                                      BOK FINANCIAL CORPORATION

                                 By   /s/ Stanley A. Lybarger
                                    --------------------------------------------
                                    Stanley A. Lybarger, Chief Executive Officer

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement or Amendment has been signed below by the following
persons in the capacities and on the date indicated.

<TABLE> 
<CAPTION> 

   Signature                                        Title                         Date
   ---------                                        -----                        ----
<S>                                            <C>                            <C> 
/s/ George B. Kaiser 
- -----------------------------------            Chairman of the Board          November 13, 1996
 George B. Kaiser                              of BOK Financial          
                                               Corporation               

/s/ Stanley A. Lybarger,                                                 
- -----------------------------------            President, Chief Executive     November 13, 1996
 Stanley A. Lybarger                           Officer, and Director of  
                                               BOK Financial Corporation 

/s/ James A. White                                                       
- -----------------------------------            Executive Vice President,      November 13, 1996
 James A. White                                Chief Financial Officer,  
                                               and Treasurer of BOK      
                                               Financial Corporation     

 /s/ John C. Morrow                                                      
- -----------------------------------            Controller of BOK              November 13, 1996
 John C. Morrow                                Financial Corporation     
                                                                         

/s/ W. Wayne Allen  
- ------------------------------------           Director of BOK Financial      November 13, 1996
 W. Wayne Allen                                Corporation               
                                    

/s/ Keith E. Bailey                  
- ------------------------------------           Director of BOK Financial      November 13, 1996
Keith E. Bailey                                Corporation               


/s/ James E. Barnes                                                      
- ------------------------------------           Director of BOK Financial      November 13, 1996
James E. Barnes                                Corporation               
</TABLE> 

                                                              Page ____ of ____.


                                   Part II - 8
<PAGE>
 
<TABLE> 
<S>                                                        <C>                                      <C> 
/s/ Sharon J. Bell 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Sharon J. Bell                                             Corporation

/s/ Larry W. Brummett 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Larry W. Brummett                                          Corporation

/s/ Glenn A. Cox 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Glenn A. Cox                                               Corporation

                        
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Ralph C. Cunningham                                        Corporation

/s/ Nancy J. Davies 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Nancy J. Davies                                            Corporation

/s/ Robert H. Donaldson 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Robert H. Donaldson                                        Corporation

/s/ William E. Durrett 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
William E. Durrett                                         Corporation

- ------------------------------------                       Director of BOK Financial                November 13, 1996
James O. Goodwin                                           Corporation

/s/ V. Burns Hargis 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
V. Burns Hargis                                            Corporation

/s/ Thomas J. Hughes, III 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Thomas J. Hughes, III                                      Corporation

/s/ E. Carey Joullian, IV 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
E. Carey Joullian, IV                                      Corporation

/s/ Robert J. LaFortune 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Robert J. LaFortune                                        Corporation

/s/ Philip C. Lauinger 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Philip C. Lauinger                                         Corporation

/s/ David R. Lopez 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
David R. Lopez                                             Corporation

/s/ Frank A. McPherson 
- ------------------------------------                       Director of BOK Financial                November 13, 1996
Frank A. McPherson                                         Corporation
</TABLE> 

                                                              Page ____ of ____.

                                   Part II - 9
<PAGE>
 
<TABLE> 
<S>                                                        <C>                                      <C> 
/s/ Robert L. Parker, Sr.                                  Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation
Robert L. Parker, Sr.                

/s/ James W. Pielsticker                                   Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation
James W. Pielsticker                 

/s/ James A. Robinson                                      Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation
James A. Robinson                    

/s/ L. Frnacis Rooney                                      Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation
L. Francis Rooney                    

/s/ Robert L. Zemanek                                      Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation
Robert L. Zemanek                    

</TABLE> 
                                POWER OF ATTORNEY

     Each person whose signature appears below hereby authorizes Stanley A.
Lybarger and James A. White, or either of them, to file one or more amendments
(including post-effective amendments) to Registration Statement number
______________, which amendments may make such changes in the Registration
Statement as Mr. Lybarger or Mr. White deems appropriate, and each such person
hereby appoints Mr. Lybarger and James A. White, or either of them, as
attorney-in-fact to execute in the name and on behalf of each person
individually, and in each capacity stated below, any such amendment to the
Registration Statement.

<TABLE> 
<CAPTION> 

   Signature                                                   Title                                      Date
   ---------                                                   -----                                      ----
<S>                                                        <C>                                      <C> 
/s/ George B. Kaiser                                       Chairman of the Board                    November 13, 1996
- -----------------------------------                        of BOK Financial
George B. Kaiser                                           Corporation
                                   
/s/ Stanley A. Lybarger                                    President, Chief Executive               November 13, 1996
- -----------------------------------                        Officer, and Director of
Stanley A. Lybarger                                        BOK Financial Corporation
                                   
/s/ James A. White                                         Executive Vice President,                November 13, 1996
- -----------------------------------                        Chief Financial Officer,
James A. White                                             and Treasurer of BOK
                                                           Financial Corporation
                                   
/s/ John C. Morrow                                         Controller of BOK                        November 13, 1996
- -----------------------------------                        Financial Corporation
John C. Morrow                     
</TABLE> 


                                                              Page ____ of ____.

                                  Part II - 10
<PAGE>
 
<TABLE> 
<CAPTION> 

<S>                                                        <C>                                      <C> 

/s/ W. Wayne Allen                                         Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
W. Wayne Allen
                                                                                                                     
/s/ Keith E. Bailey                                        Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Keith E. Bailey                                                                                                      
                                                                                                                     
/s/ James E. Barnes                                        Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
James E. Barnes                                                                                                      
                                                                                                                     
/s/ Sharon J. Bell                                         Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Sharon J. Bell                                                                                                       
                                                                                                                     
/s/  Larry W. Brummett                                     Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Larry W. Brummett                                                                                                    
                                                                                                                     
/s/  Glenn A. Cox                                          Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
Glenn A. Cox                                                                                                         
                                                                                                                     
/s/ Ralph C. Cunningham                                    Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
Ralph C. Cunningham                                                                                                  
                                                                                                                     
/s/ Nancy J. Davies                                        Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
Nancy J. Davies                                                                                                      
                                                                                                                     
/s/ Robert H. Donaldson                                    Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
Robert H. Donaldson                                                                                                  
                                                                                                                     
/s/ William E. Durrett                                     Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
William E. Durrett                                                                                                   
                                                                                                                     
                                                           Director of BOK Financial                November 13, 1996
- -----------------------------------                        Corporation                                               
James O. Goodwin                                                                                                     
                                                                                                                     
/s/ V. Burns Hargis                                        Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
V. Burns Hargis                                                                                                      
                                                                                                                     
/s/ Thomas J. Hughes, III                                  Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Thomas J. Hughes, III 
                                                                                                                     
/s/ E. Carey Joullian, IV                                  Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
E. Carey Joullian, IV                                                                                                
                                                                                                                     
/s/ Robert J. LaFortune                                    Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                                
Robert J. LaFortune                                        

</TABLE> 


                                                              Page ---- of ----.

                                  Part II - 11
<PAGE>
 
<TABLE> 
<CAPTION> 

<S>                                                        <C>                                      <C> 

/s/ Philip C. Lauinger                                     Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Philip C. Lauinger                                                                                                   
                                                                                                                     
/s/ David R. Lopez                                         Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
David R. Lopez                                                                                                       
                                                                                                                     
/s/ Frank A. McPherson                                     Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Frank A. McPherson                                                                                                   
                                                                                                                     
/s/ Robert L. Parker, Sr.                                  Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
Robert L. Parker, Sr.                                                                                                
                                                                                                                     
/s/ James W. Pielsticker                                   Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
James W. Pielsticker                                                                                                 
                                                                                                                     
/s/ James A. Robinson                                      Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
James A. Robinson                                                                                                    
                                                                                                                     
/s/ L. Francis Rooney                                      Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                               
L. Francis Rooney                                                                                                    
                                                                                                                     
/s/ Robert L. Zemanek                                      Director of BOK Financial                November 13, 1996
- ------------------------------------                       Corporation                                                
Robert L. Zemanek                                          
                                                                                                          BOK-S-4.2
</TABLE> 
                                                              Page ---- of ----.

                                  Part II - 12
<PAGE>
 
                  Index To Financial Statements of Park Cities
                  --------------------------------------------

                  Park Cities Bancshares, Inc. and Subsidiaries
<TABLE> 
<CAPTION> 

<S>                                                                                                            <C> 
Consolidated Balance Sheets (Unaudited) September 30, 1996 and December 31, 1995.............................. F-2

Consolidated Income Statements (Unaudited) Quarter Ended September 30, 1996
and 1995 and Nine Months Ended September 30, 1996 and 1995.................................................... F-3

Consolidated Statements of Cash Flows (Unaudited) for the Nine Months
Ended September 30, 1996 and 1995........................................................................... F-4,5

Consolidated Statements of Shareholders' Equity for the Nine Months
Ended September 30, 1996 (Unaudited).......................................................................... F-6

Notes to Consolidated Financial Statements (Unaudited)........................................................ F-7

Reports of Independent Accountants............................................................................ F-8

Consolidated Balance Sheets December 31, 1995 and 1994..................................................... F-9,10

Consolidated Statements of Income for the years ended
December 31, 1995, 1994, and 1993............................................................................ F-11

Consolidated Statements of Shareholders' Equity for the years ended
December 31, 1995, 1994, and 1993............................................................................ F-12

Consolidated Statements of Cash Flows for the years ended
December 31, 1995, 1994, and 1993......................................................................... F-13,14

Notes to Consolidated Financial Statements............................................................F-15 thru 29

</TABLE> 


                                                              Page ____ of ____.

                                       F-1
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                           CONSOLIDATED BALANCE SHEETS
                    SEPTEMBER 30, 1996 AND DECEMBER 31, 1995
                                   (UNAUDITED)

<TABLE>
<CAPTION>


ASSETS                                                  1996            1995
                                                        ----            ----
<S>                                                 <C>             <C>
Cash and due from banks                             $16,096,229     $16,189,242
Federal funds sold                                    9,000,000      36,000,000
Interest - bearing deposits                             500,000               0
Held to maturity securities                          57,698,287      44,129,908
Available for sale securities                        42,392,752      39,543,536

Loans                                                75,973,027      71,351,181
Reserve for possible loan losses                       (876,229)       (834,931)
                                                    ---------------------------
   Net loans                                         75,096,798      70,516,250

Bank premises and equipment                           3,440,570       3,530,178
Accrued interest receivable                           1,704,794       1,649,744
Other assets                                            339,171         352,882
                                                   ----------------------------
     Total assets                                  $206,268,601    $211,911,740
                                                   ============================

LIABILITIES AND SHAREHOLDERS' EQUITY

Demand deposits                                     $56,675,836     $54,163,303
Interest-bearing demand deposits                     64,309,822      70,504,641
Savings deposits                                      4,847,136       4,945,784
Other time deposits                                  61,363,602      65,421,255
                                                   ----------------------------
   Total deposits                                   187,196,396     195,034,983

Securities sold under agreements to repurchase          380,000         460,000
Accrued interest payable                                357,212         406,299
Other liabilities                                       479,392         473,541
Minority interest in consolidated subsidiary             13,096          11,402

Shareholders' equity:
Common stock, $5 par value, 2,000,000 shares
  authorized; 958,015 and 869,594 shares issued
  at September 30, 1996 and December 31, 1995         4,790,075       4,347,970
Additional paid-in capital                            2,834,868       2,804,965
Retained earnings                                    10,650,541       8,724,154
Unrealized gain on available for sale securities         39,542         120,947
Less treasury stock, at cost; 36,667 shares at
  September 30, 1996 and December 31, 1995             (472,521)       (472,521)
                                                   ----------------------------
   Total shareholders' equity                        17,842,505      15,525,515
                                                   ----------------------------
     Total liabilities and shareholders' equity    $206,268,601    $211,911,740
                                                   ============================
</TABLE>

See accompanying notes to consolidated financial statements.




                                      F-2
<PAGE>
 

                         PARK CITIES BANCSHARES, INC.
                        CONSOLIDATED INCOME STATEMENTS
                                  (UNAUDITED)

<TABLE>
<CAPTION>


                                                  QUARTER ENDED              NINE MONTHS ENDED
                                                   SEPTEMBER 30,                SEPTEMBER 30,
                                                1996          1995           1996           1995
                                                ----          ----           ----           ----
<S>                                         <C>            <C>            <C>            <C> 
Interest income:
  Loans                                     $1,668,992     $1,616,108     $4,926,173     $4,528,516
  Securities                                 1,469,441      1,203,929      4,585,530      4,013,630
  Federal funds sold and other                 245,369        157,978        870,489        455,032
                                            -------------------------------------------------------
     Total interest income                   3,383,802      2,978,015     10,382,192      8,997,178
                                            -------------------------------------------------------

Interest expense:
  Savings and demand deposits                  388,669        433,605      1,214,502      1,353,382
  Time deposits and other                      796,552        621,753      2,759,265      2,117,096
                                            -------------------------------------------------------
     Total interest expense                  1,185,221      1,055,358      3,973,767      3,470,478
                                            -------------------------------------------------------

       Net interest income                   2,198,581      1,922,657      6,408,425      5,526,700

Provision for possible loan losses                   0              0         40,000         10,000
                                            -------------------------------------------------------

     Net interest income after provision
        for possible loan losses             2,198,581      1,922,657      6,368,425      5,516,700

Noninterest income:
  Service charges                              210,070        190,404        647,834        607,346
  Net gain (loss) on sale of securities        (15,079)       (10,087)       (15,079)        (5,975)
  Other income                                  34,751         33,492        102,933        104,318
                                            -------------------------------------------------------
     Total noninterest income                  229,742        213,809        735,688        705,689

Noninterest expense:
  Salaries and employee benefits               665,570        626,740      1,996,865      1,870,273
  Net occupancy expense                        115,780        105,444        348,784        306,172
  Equipment expense                             66,526         48,486        177,320        158,663
  Data processing expense                       84,799         84,443        266,948        254,166
  Regulatory assessments                        16,066          3,631         47,697        222,646
  Other expense                                207,978        245,078        682,169        752,551
  Minority interest share of income                622            518          1,754          1,352
                                            -------------------------------------------------------
     Total noninterest expense               1,157,341      1,114,340      3,521,537      3,565,823

       Income before income tax              1,270,982      1,022,126      3,582,576      2,656,566

Provision for federal income tax               439,340        351,000      1,236,740        912,900
                                            -------------------------------------------------------

       Net income                           $  831,642     $  671,126     $2,345,836     $1,743,666
                                            =======================================================

Net income per share                        $     0.78     $     0.64     $     2.21     $     1.67
                                            =======================================================

</TABLE>


See accompanying notes to consolidated financial statements.




                                      F-3
<PAGE>
 
                         PARK CITIES BANCSHARES, INC.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
             FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1996 AND 1995
                                  (UNAUDITED)

<TABLE>
<CAPTION>

                                                                1996          1995
                                                                ----          ----
<S>                                                         <C>            <C>
Operating activities:
Net income                                                 $ 2,345,836    $ 1,743,666
Adjustments to reconcile net income to net cash provided
  by operating activities:

  Provision for possible loan losses                            40,000         10,000
  Depreciation and amortization                                168,719        155,834
  Amortization of security premiums                            478,920        483,717
  Accretion of security discounts                             (784,859)      (744,851)
  Net loss on sale of securities                                15,079          5,975
  Increase in accrued interest receivable                      (55,050)      (124,107)
  Decrease in other assets                                      55,647         58,925
  Increase (decrease) in accrued interest payable              (49,087)        29,262
  Increase in other liabilities                                  7,545         18,628
                                                            -------------------------
     Net cash provided by operating activities               2,222,750      1,637,049
                                                            -------------------------

Investing activities:

  Net decrease in federal funds sold                        27,000,000     13,000,000
  Purchase of interest-bearing deposits                       (500,000)             0
  Purchases of securities                                  (80,120,090)   (23,610,321)
  Proceeds from maturities of securities                    58,857,045     33,569,843
  Proceeds from sales of securities                          5,012,969      6,293,659
  Net increase in loans                                     (4,620,548)    (6,867,546)
  Net purchases of bank premises and equipment                 (79,111)      (286,503)
                                                            -------------------------
     Net cash provided by investing activities               5,550,265     22,099,132
                                                            -------------------------

Financing activities:

  Net decrease in demand and savings deposits               (3,780,934)   (17,332,032)
  Net decrease in other time deposits                       (4,057,653)   (11,968,089)
  Net decrease in securities sold under
     agreements to repurchase                                  (80,000)    (2,170,000)
  Dividends paid                                                (1,199)        (1,640)
  Stock sold through exercise of options                        53,758              0
                                                            -------------------------
     Net cash used in financing activities                  (7,866,028)   (31,471,761)
                                                            -------------------------

Decrease in cash and due from banks                            (93,013)    (7,735,580)

Cash and due from banks, beginning of period                16,189,242     18,213,914
                                                            -------------------------

Cash and due from banks, end of period                     $16,096,229    $10,478,334
                                                            =========================
</TABLE>

See accompanying notes to consolidated financial statements.




                                      F-4
<PAGE>
 

                         PARK CITIES BANCSHARES, INC.
               CONSOLIDATED STATEMENTS OF CASH FLOWS, CONTINUED
             FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1996 AND 1995
                                  (UNAUDITED)

<TABLE>

<S>                                                        <C>           <C> 
Supplemental disclosures of cash flow information: 
  Cash paid during the period for:
     Interest                                             $ 4,022,854   $ 3,441,216
     Income taxes                                           1,195,000       925,000
  Increase (decrease) of unrealized gain (loss) on
     available for sale securities                            (81,405)      742,500
  Shares of common stock issued as a 10% stock dividend        83,650        75,463

</TABLE>
























See accompanying notes to consolidated financial statements.




                                      F-5
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                 CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
 FOR THE YEAR ENDED DECEMBER 31, 1995 AND NINE MONTHS ENDED SEPTEMBER 30,1996
                                  (UNAUDITED)
<TABLE>
<CAPTION>
                                                                                                                   
                                                                                    NET UNREALIZED
                                                                                    GAIN (LOSS) ON                 
                                                                                       AVAILABLE
                                           COMMON STOCK        ADDITIONAL                 FOR                  
                                                                 PAID-IN     RETAINED     SALE      TREASURY
                                         SHARES     AMOUNT       CAPITAL     EARNINGS  SECURITIES     STOCK      TOTAL
                                         ------     ------       -------     --------  ----------     -----      -----
<S>                                    <C>        <C>          <C>          <C>        <C>          <C>       <C> 
Balance January 1, 1995                  792,205  $3,961,025    2,799,545    6,791,218  (819,591)    (472,521) $12,259,676
  Net income                                                                 2,308,141                           2,308,141
  Adjustment to minority interest in
    subsidiary                                                                   3,750                               3,750
  10% stock dividend, including cash
    paid for fractional shares            75,463     377,315                  (378,955)                             (1,640)
  Sale of stock through exercise of
    stock options                          1,926       9,630        5,420                                           15,050
  Change in unrealized gain (loss) on
    available for sale securities                                                        940,538                   940,538
                                         ---------------------------------------------------------------------------------

Balance December 31, 1995                869,594   4,347,970    2,804,965    8,724,154   120,947     (472,521)  15,525,515
  Net income                                                                 2,345,836                           2,345,836
  10% stock dividend, including cash
    paid for fractional shares            83,650     418,250                  (419,449)                             (1,199)
  Sale of stock through exercise of
    stock options                          4,771      23,855       29,903                                           53,758
  Change in unrealized gain (loss) on
    available for sale securities                                                        (81,405)                  (81,405)
                                         ---------------------------------------------------------------------------------

Balance September 30, 1996               958,015  $4,790,075    2,834,868   10,650,541    39,542     (472,521) $17,842,505
                                         ================================================================================
</TABLE>

See accompanying notes to consolidated financial statements.




                                      F-6
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
                                  (UNAUDITED)

1.       UNAUDITED FINANCIAL STATEMENTS
         ------------------------------
         The financial statements for the nine months ended September 30, 1996
         and 1995 are unaudited; however, in the opinion of management all
         adjustments necessary for fair presentation of results for the interim
         periods have been included. All adjustments made were of a normal
         recurring nature. The interim results for the nine months ended
         September 30, 1996 are not necessarily indicative of the results for
         the full year.

         The financial statements do not include all of the disclosures normally
         required by generally accepted accounting principles as were contained
         in the annual report previously prepared for the year ended December
         31, 1995.

2.       NET INCOME PER SHARE
         --------------------
         Net income per share is computed using the weighted average number of 
         shares and common share equivalents outstanding during each period. The
         effect of stock options issued, which are considered common share
         equivalents, on the average number of shares outstanding is determined
         by the treasury stock method. The average number of shares outstanding
         has been restated for the effects of the stock dividends.

         Shares used to compute per share amounts were 1,066,424 and 1,063,721
         for the three and nine months ended September 30, 1996, respectively,
         and were 1,042,033 for the periods ended September 30, 1995.






                                      F-7
<PAGE>
 
              [COOPERS & LYBRAND L.L.P. LETTERHEAD APPEARS HERE]


                       Report of Independent Accountants



To the Shareholders and Board of Directors
Park Cities Bancshares, Inc.
Dallas, Texas

We have audited the accompanying consolidated balance sheets of Park Cities
Bancshares, Inc.  and its subsidiaries as of December 31, 1995 and 1994, and the
related consolidated statements of income, shareholders' equity, and cash flows
for each of the three years in the period ended December 31, 1995.  These
financial statements are the responsibility of the Company's management.  Our
responsibility is to express an opinion on these financial statements based on
our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Park Cities
Bancshares, Inc. and its subsidiaries as of December 31, 1995 and 1994, and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended December 31, 1995 in conformity with generally
accepted accounting principles.

/s/ COOPERS & LYBRAND L.L.P.

Dallas, Texas
March 8, 1996

                                      F-8
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                          CONSOLIDATED BALANCE SHEETS
                          December 31, 1995 and 1994

<TABLE>
<CAPTION>
                   ASSETS                          1995          1994
                                               ------------  ------------
<S>                                            <C>             <C>
Cash and due from banks                        $ 16,189,242  $ 18,213,914
Federal funds sold                               36,000,000    23,000,000
Held to maturity securities (Note 2)             44,129,908    63,303,658
Available for sale securities (Note 2)           39,543,536    34,728,729
Loans:                                                        
  Commercial                                     20,599,574    18,459,666
  Installment                                     1,223,198     1,164,685
  Real estate, construction                       2,275,981     1,575,432
  Real estate, mortgage and other                47,245,463    41,832,076
  Other                                             141,256        68,007
                                               ------------  ------------
                                                              
                                                 71,485,472    63,099,866
                                                              
   Unearned income                                 (134,291)     (127,060)
                                               ------------  ------------
                                                              
                                                 71,351,181    62,972,806
                                                              
   Reserve for possible loan losses               
    (Note 3)                                       (834,931)     (793,969)
                                               ------------  ------------
                                                              
      Net loans                                  70,516,250    62,178,837
                                                              
Bank premises and equipment (Note 4)              3,530,178     3,410,177
Accrued interest receivable                       1,649,744     1,463,489
Other assets                                        352,882       881,941
                                               ------------  ------------
                                                              
      Total assets                             $211,911,740  $207,180,745
                                               ============  ============
</TABLE>
 
        The accompanying notes are an integral part of the consolidated
                             financial statements.
 

                                      F-9
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                     CONSOLIDATED BALANCE SHEETS, Continued
                           December 31, 1995 and 1994

<TABLE>
<CAPTION>
   LIABILITIES AND SHAREHOLDERS' EQUITY            1995          1994
                                               ------------  ------------
<S>                                            <C>             <C>
Demand deposits                                $ 54,163,303  $ 53,742,575
Interest-bearing demand deposits                 70,504,641    72,467,004
Savings deposits                                  4,945,784     5,723,663
Other time deposits (Note 5)                     65,421,255    58,345,816
                                               ------------  ------------
                                                              
      Total deposits                            195,034,983   190,279,058
                                                              
Securities sold under agreements to repurchase      460,000     2,490,000
Accrued interest payable                            406,299       295,771
Other liabilities                                   473,541       518,002
Minority interest in consolidated subsidiary                  
  (Notes 1 and 11)                                   11,402        13,238
Convertible subordinated notes (Note 12)                        1,325,000
                                                              
Commitments and contingencies (Notes 8 and 15)                
                                                              
Shareholders' equity (Notes 9, 11 and 12):                    
  Common stock, $5 par value,                                  
  2,000,000 shares authorized;                                 
  869,594 and 792,205 shares                                  
  issued at December 31, 1995                                        
  and 1994                                        4,347,970     3,961,025
  Additional paid-in capital                      2,804,965     2,799,545
  Retained earnings                               8,724,154     6,791,218
  Unrealized gain (loss) on available for                     
  sale securities                                   120,947      (819,591)
  Less treasury stock, at cost;                               
  36,667 shares at December 31, 1995                           
  and 1994                                         (472,521)     (472,521)
                                               ------------  ------------
                                                              
      Total shareholders' equity                 15,525,515    12,259,676 
                                               ------------  ------------
                                                              
        Total liabilities and shareholders'                   
          equity                               $211,911,740  $207,180,745
                                               ============  ============
</TABLE>
 
   The accompanying notes are an integral part of the consolidated 
                             financial statements.

                                      F-10
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                       CONSOLIDATED STATEMENTS OF INCOME
              for the years ended December 31, 1995, 1994 and 1993

<TABLE>
<CAPTION>
                                               1995        1994        1993
                                           -----------  ----------  ----------
<S>                                        <C>          <C>         <C>
Interest income:
  Loans                                    $ 6,194,496  $4,815,297  $4,352,237
  Securities                                 5,155,275   4,115,555   3,835,389
  Federal funds sold                           772,785     538,441     586,424
                                           -----------  ----------  ----------
                                                                     
      Total interest income                 12,122,556   9,469,293   8,774,050
                                           -----------  ----------  ----------
                                                                     
Interest expense:                                                    
  Savings deposits and interest-bearing                              
   demand deposits                           1,799,486   1,579,421   1,530,254
  Other time deposits and                                            
   interest-bearing liabilities              2,791,273   1,683,378   1,626,114
                                           -----------  ----------  ----------
                                                                     
      Total interest expense                 4,590,759   3,262,799   3,156,368
                                           -----------  ----------  ----------
                                                                     
      Net interest income                    7,531,797   6,206,494   5,617,682
                                                                     
Provision for possible loan losses              10,000     (90,000)   
                                           -----------  ----------  ----------
                                                                     
      Net interest income after                                      
       provision for possible                                        
       loan losses                           7,521,797   6,296,494   5,617,682
                                           -----------  ----------  ----------
                                                                     
Noninterest income:                                                  
  Service charges                              797,555     835,228     850,422
  Net gain (loss) on sale of securities         (5,975)    (74,021)    276,574
  Other income                                 129,424     110,020      95,946
                                           -----------  ----------  ----------
                                                                     
      Total noninterest income                 921,004     871,227   1,222,942
                                           -----------  ----------  ----------
                                                                     
Noninterest expense:                                                 
  Salaries and employee benefits             2,696,834   2,426,551   2,273,647
  Net occupancy expense                        404,615     323,403     249,844
  Equipment expense                            216,024     190,715     161,263
  Data processing expense                      347,338     316,615     330,855
  Regulatory assessments                       252,065     392,986     372,356
  Other expense                              1,000,760     752,531     762,807
  Minority interest share of income              1,824       1,417       1,415
                                           -----------  ----------  ----------
                                                                     
      Total noninterest expense              4,919,460   4,404,218   4,152,187
                                           -----------  ----------  ----------
                                                                     
      Income before income tax               3,523,341   2,763,503   2,688,437
                                                                     
Provision for federal income tax             1,215,200     948,200     875,973
                                           -----------  ----------  ----------
                                                                     
      Net income                           $ 2,308,141  $1,815,303  $1,812,464
                                           ===========  ==========  ==========

Net income per common share                $      2.42  $     1.95  $     1.97
                                           ===========  ==========  ==========
Weighed average common shares
 outstanding                                   952,714     929,196     919,815
                                           ===========  ==========  ==========
</TABLE>
 
              The accompanying notes are an integral part of the 
                      consolidated financial statements.

                                      F-11
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
              for the years ended December 31, 1995, 1994 and 1993

<TABLE>
<CAPTION>
                                                                             Net Unrealized
                                  Common Stock       Additional              Gain (Loss) on                         
                             -----------------------  Paid-In     Retained    Available for     Treasury
                              Shares       Amount     Capital     Earnings   Sale Securities      Stock        Total
                             -------     ----------  ----------  ----------  ----------------  -----------   -----------
<S>                          <C>         <C>         <C>         <C>         <C>               <C>           <C>       
Balance, January 1, 1993     659,951     $3,299,755  $2,778,295  $3,812,483                     $(450,311    $ 9,440,222
  Net income                                                      1,812,464                                    1,812,464
  Minority interest in                                                                   
   subsidiary due to                                                                             
   exchange                    1,200          6,000       6,000       8,311                                       20,311
  10% stock dividend,                                                                                     
   including cash paid for                                                                                           
   fractional shares          62,445        312,225                (312,904)                                        (679)
  Purchase of treasury                                                                   
   stock (3,435 shares)                                                                           (54,960)       (54,960)          
  Sale of treasury                                                                       
   stock (3,000 shares)                                  15,250                                    32,750         48,000
                             -------     ----------  ----------  ----------                     ---------    -----------
                                                                                         
Balance, December 31, 1993   723,596      3,617,980   2,799,545   5,320,354                      (472,521)    11,265,358
  Net income                                                      1,815,303                                    1,815,303
  Adjustment to beginning                                                                
   balance due to change in                                                              
   accounting principle                                                                  
   (net of tax)                                                                    $139,069                      139,069
  10% stock dividend,                                                                                       
   including cash paid for                                                                                             
   fractional shares          68,609        343,045                (344,439)                                      (1,394)
  Change in unrealized loss                                                              
   on available for sale                                                                 
   securities (net of tax)                                                         (958,660)                   (958,660)
                             -------     ----------  ----------  ----------       ---------     ---------    -----------
                                                                                         
Balance, December 31, 1994   792,205      3,961,025   2,799,545   6,791,218        (819,591)     (472,521)    12,259,676
  Net income                                                      2,308,141                                    2,308,141
  Adjustment to                                                       3,750                                        3,750
   minority interest in                                                                  
   subsidiary                                                                            
  10% stock dividend,                                                                    
   including cash paid for                                                               
   fractional shares          75,463        377,315                (378,955)                                      (1,640)
  Sale of stock through                                                                  
   exercise of stock                                                                     
   options                    1,926           9,630       5,420                                                   15,050
  Change in unrealized gain                                                              
   (loss) on available for                                                               
   sale securities                                                                       
   (net of tax)                                                                     940,538                      940,538
                             -------     ----------  ----------  ----------        --------     ---------    -----------
                                                                                         
Balance, December 31, 1995   869,594     $4,347,970  $2,804,965  $8,724,154        $120,947     $(472,521)   $15,525,515
                             =======     ==========  ==========  ==========        ========     =========    ===========
</TABLE>

              The accompanying notes are an integral part of the 
                      consolidated financial statements.

                                      F-12
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
              for the years ended December 31, 1995, 1994 and 1993
                Increase (Decrease) in Cash and Cash Equivalents

<TABLE>
<CAPTION>
                                                     1995         1994          1993
                                                 -----------  ------------  ------------
<S>                                              <C>          <C>           <C>
Operating activities:
  Net income                                     $ 2,308,141  $  1,815,303  $  1,812,464
  Adjustments to reconcile net                                           
   income to net cash provided by                                        
   operating activities:                                                 
    Provision for possible loan losses                10,000       (90,000)             
    Depreciation and amortization                    209,375       162,178       137,422  
    Amortization of security premiums                636,053       722,067       598,424  
    Accretion of security discounts                 (838,038)     (171,805)      (32,638) 
    Premium paid on note redemption                   66,250         2,500              
    Net loss (gain) on sale of investment                                
     securities                                        5,975        74,021      (276,574)
    Increase in accrued interest receivable         (186,255)     (252,423)     (125,586)
    Decrease (increase) in other assets               44,493        (5,862)       56,215 
    Increase (decrease) in accrued interest                              
     payable                                         110,528        85,009       (42,962)
    Decrease in other liabilities                    (42,637)      (14,784)       (7,387)
                                                 -----------  ------------  ------------
                                                                         
      Net cash provided by operating activities    2,323,885     2,326,204     2,119,378 
                                                 -----------  ------------  ------------
                                                                         
Investing activities:                                                    
  Net (increase) decrease in federal funds sold  (13,000,000)   (5,400,000)    6,900,000 
  Purchases of held to maturity securities       (32,479,520)  (39,043,665)            
  Proceeds from maturities of held to maturity                           
   securities                                     39,818,759    15,697,155   
  Purchases of available for sale securities        (997,960)  (14,233,976)
  Proceeds from maturities of available for sale                                         
   securities                                      8,619,180       836,655   
  Proceeds from sales of available for sale                              
   securities                                      1,019,688    12,616,719    
  Purchases of investment securities                                         (39,421,201)
  Proceeds from maturities of investment                                 
   securities                                                                 18,775,149 
  Proceeds from sales of investment securities                                10,393,731 
  Net increase in loans                           (8,347,413)   (2,770,222)   (6,167,331)
  Net purchases of bank premises and equipment      (329,376)   (1,597,169)       (2,968)
                                                 -----------  ------------  ------------
                                                                         
    Net cash used in  investing activities        (5,696,642)  (33,894,503)   (9,522,620)
                                                 -----------  ------------  ------------
                                                                         
Financing activities:                                                    
  Net increase (decrease) in demand and savings                          
   deposits                                       (2,319,514)   21,367,187    10,110,843 
  Net increase (decrease) in other time deposits   7,075,439    16,431,606    (9,702,845)
  Net (decrease) increase in securities sold                             
   under agreements to repurchase                 (2,030,000)    1,080,000     1,090,000
  Proceeds from sale of treasury stock                                            48,000 
  Treasury stock purchased                                                       (54,960)
  Redemption of convertible subordinated notes    (1,391,250)      (52,500)  
  Dividends paid                                      (1,640)       (1,394)         (679)
  Stock sold through exercise of options              15,050          
                                                 -----------  ------------  ------------                                      
    Net cash provided by financing activities      1,348,085    38,824,899     1,490,359 
                                                 -----------  ------------  ------------
                                                                         
(Decrease) increase in cash and due from banks    (2,024,672)    7,256,600    (5,912,883)
                                                                         
Cash and due from banks, beginning of year        18,213,914    10,957,314    16,870,197
                                                 -----------  ------------  ------------
                                                                         
Cash and due from banks, end of year             $16,189,242  $ 18,213,914  $ 10,957,314
                                                 ===========  ============  ============
</TABLE>
 
              The accompanying notes are an integral part of the 
                      consolidated financial statements.
 
 

                                      F-13
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                CONSOLIDATED STATEMENTS OF CASH FLOWS, Continued
              for the years ended December 31, 1995, 1994 and 1993
                Increase (Decrease) in Cash and Cash Equivalents

<TABLE>
<CAPTION>
                                                        1995         1994        1993
                                                     -----------  ----------  ----------
<S>                                                  <C>          <C>         <C>
Supplemental disclosures of cash flow information:   
  Cash paid during the year for:                     
    Interest                                         $ 4,480,231  $3,177,790  $3,199,330
    Income taxes                                       1,300,000     984,549     795,000
Supplemental disclosures of noncash investing and                
 financing activities:                                           
  Increase (decrease), net of tax of unrealized                  
   gain (loss) on available for sale securities          940,538    (819,591)
  Transfer of securities held to maturity to          
   available for sale                                 12,478,793
</TABLE>
 
Bancshares issued 75,463, 68,609 and 62,445 shares of its common stock as a 10%
stock dividend for the years ended December 31, 1995, 1994 and 1993,
respectively.
 
 
   The accompanying notes are an integral part of the consolidated financial
                                  statements.
 

                                      F-14
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1.   Summary of Significant Accounting Policies:
     ------------------------------------------ 

     Organization and Basis of Presentation
     --------------------------------------

     The consolidated financial statements include the accounts of Park Cities
     Bancshares, Inc. ("Bancshares") and its wholly-owned subsidiary, Park
     Cities Corporation and its majority-owned subsidiary, First National Bank
     of Park Cities ("the Bank"). Bancshares and its subsidiaries are
     collectively referred to as the Company. All significant intercompany
     accounts have been eliminated.

     The Company operates two branches within the Park Cities community.
     Revenues are derived primarily from commercial and residential loans to
     customers and interest on securities.

     The preparation of these consolidated financial statements in conformity
     with generally accepted accounting principles requires the use of
     management's estimates. These estimates are subjective in nature and
     involve matters of judgment. Actual amounts could differ from these
     estimates.

     Bank Premises and Equipment
     ---------------------------

     Bank premises, including leasehold improvements and equipment, are stated
     at cost less accumulated depreciation and amortization. Major renewals and
     betterments are capitalized; maintenance and repairs, which do not improve
     or extend the life of the respective assets, are charged to income. Gains
     and losses on sales and retirements of bank premises and equipment are
     reflected in current operations.

     Depreciation and amortization for financial reporting purposes is computed
     based on the estimated useful lives of the assets using the straight-line
     method.

     Loans
     -----

     The provision for possible loan losses is based on management's estimate of
     the amount required to maintain an allowance adequate to reflect the risks
     in the loan portfolio. In determining the provision for possible loan
     losses, consideration is given to existing economic conditions, the
     Company's loss experience in relation to outstanding loans, changes in the
     loan portfolio, borrowers' performance in reducing loan principal, adequacy
     of loan collateral as applicable and other relevant factors. The Company
     considers the reserve for possible loan losses adequate to cover losses
     inherent in loans, commercial and real estate loan commitments and standby
     letters of credit outstanding.

                                      F-15
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     Interest on loans is credited to income in the period in which it is earned
     based upon the principal amount outstanding. The accrual of interest is
     discontinued and any accrued and unpaid interest is reversed generally when
     the loan becomes delinquent greater than 90 days. Any such interest
     ultimately collected is credited to income in the period received.

     In May 1993, the Financial Accounting Standards Board ("FASB") issued
     Statement of Financing Accounting Standards No. 114, "Accounting by
     Creditors for Impairment of a Loan." The statement requires that impaired
     loans within the scope of this statement be measured based on the present
     value of expected future cash flows. The present value may be determined by
     discounting the expected future cash flows at the loan's effective rate or
     valued at the loan's observable market price or valued at the fair value of
     the collateral if the loan is collateral dependent. This pronouncement was
     adopted effective January 1, 1995 and did not produce a material effect on
     the financial statements.

     Other Real Estate Owned
     -----------------------

     Real estate acquired in the settlement of loans is recorded at the lower of
     the loan balance at foreclosure or fair value less estimated selling costs.
     When the property is acquired, any excess of the loan balance over fair
     value of the property less estimated selling cost is charged to the reserve
     for possible loan losses. Costs directly related to the development or
     improvement of real estate acquired in settlement of loans are capitalized.
     Costs of holding real estate acquired in settlement of loans, principally
     taxes, are expensed as incurred.

     Valuations are periodically performed by management and a valuation
     allowance is established by a charge to operations if the carrying value of
     a property exceeds its estimated fair value less estimated selling costs.

     Installment Loans
     -----------------

     Unearned interest income on installment loans is recognized as income using
     the sum-of-the-months'-digits method, which provides an approximate level
     rate of return on the outstanding principal balance.

                                      F-16
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     Income Tax
     ----------

     The Company follows the provisions of Statement of Financial Accounting
     Standards No. 109 ("SFAS 109"), "Accounting for Income Taxes," which
     requires recognition of deferred tax liabilities and assets for the
     expected future tax consequences of temporary differences between tax basis
     and financial reporting basis. Under this method, deferred tax liabilities
     and assets are determined based on the difference between the financial
     statement and tax bases of assets and liabilities using current enacted tax
     rates (see Note 6).

     Securities
     ----------

     Effective January 1, 1994, the Company adopted the provisions of Statement
     of Financial Accounting Standards No. 115, "Accounting for Certain
     Investments in Debt and Equity Securities" ("SFAS 115"). In accordance with
     SFAS 115, prior period financial statements were not restated to reflect
     the change in accounting principle. Upon adoption, the balance of
     shareholders' equity increased by $139,069 (net of $71,641 in deferred
     income taxes) to reflect the net unrealized gains on securities classified
     as available for sale that were previously classified as held for
     investment and carried at amortized cost.

     The Company follows the requirements of SFAS 115, classifying and
     accounting for debt and equity securities as follows:

         Held to Maturity. Debt securities that management has the positive
         intent and ability to hold until maturity are classified as held to
         maturity and are carried at their remaining unpaid principal balance,
         net of unamortized premiums or unaccreted discounts. Premiums are
         amortized and discounts are accreted using the level interest yield
         method over the estimated remaining term of the underlying security.

         Available for Sale. Debt and equity securities that will be held for
         indefinite periods of time, including securities that may be sold in
         response to changes in market interest or prepayment rates, needs for
         liquidity and changes in the availability of and the yield of
         alternative investments are classified as available for sale. These
         assets are carried at market value. Market value is determined using
         published quotes as of the close of business. Unrealized gains and
         losses are excluded from earnings and reported net of tax as a separate
         component of shareholders' equity until realized.

                                      F-17
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     Prior to the adoption of SFAS 115, investment securities were stated at
     cost, adjusted for amortization of premiums and accretion of discounts on a
     level yield basis.

     Gains and losses on sales of securities are recognized in the year of sale
     based on the specific identification method.

     Statement of Cash Flows
     -----------------------

     For purposes of reporting cash flows, cash and cash equivalents include
     cash on hand and amounts due from banks.

     Reserve Balances
     ----------------

     Under regulations of the Federal Reserve Board, First National Bank of Park
     Cities is required to maintain average reserve balances with the Federal
     Reserve Bank based on a percentage of deposits. The required reserve
     balances as of December 31, 1995 and 1994 were $2,000,000 and $1,275,000,
     respectively.

2.    SECURITIES:
      -----------

     The amortized cost and estimated market value of securities as of December
     31, 1995 and 1994 are as follows:

<TABLE>
<CAPTION>
                                                 Gross        Gross
                                   Amortized   Unrealized  Unrealized   Aggregate
                                     Cost        Gains      Losses     Fair Value
                                  -----------  ----------  ----------  -----------
<S>                               <C>          <C>         <C>         <C>
              1995
              ----
 
    Held to maturity securities:
      U.S. Treasury                $11,986,796   $ 96,109   $ 31,457   $12,051,448
      U.S. Government agencies      32,143,112    141,870    119,028    32,165,954
                                   -----------   --------   --------   -----------
                                                                       
                                   $44,129,908   $237,979   $150,485   $44,217,402
                                   ===========   ========   ========   ===========
                                                                       
    Available for sale securities:                                     
      U.S. Treasury                $38,217,689   $249,805   $101,975   $38,365,519
      U.S. Government agencies         925,257     35,560                  960,817
      Other                            217,200                             217,200
                                   -----------   --------   --------   -----------
                                                                       
                                   $39,360,146   $285,365   $101,975   $39,543,536
                                   ===========   ========   ========   ===========
</TABLE> 

                                      F-18
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


<TABLE>
<CAPTION>
                                                 Gross        Gross
                                   Amortized   Unrealized  Unrealized   Aggregate
                                     Cost        Gains      Losses     Fair Value
                                  -----------  ----------  ----------  -----------
<S>                               <C>          <C>         <C>         <C>
              1994
              ----
 
    Held to maturity securities:
      U.S. Treasury                $20,563,212             $  851,649  $19,711,563
      U.S. Government agencies      42,740,446   $ 12,073   1,701,314   41,051,205
                                   -----------   --------  ----------  -----------
                                                                      
                                   $63,303,658   $ 12,073  $2,552,963  $60,762,768
                                   ===========   ========  ==========  ===========

    Available for sale securities:                                    
    U.S. Treasury                  $32,234,975             $1,271,537  $30,963,438
    U.S. Government agencies         3,518,358   $ 30,601         868    3,548,091
    Other                              217,200                             217,200
                                   -----------   --------  ----------  -----------

                                   $35,970,533   $ 30,601  $1,272,405  $34,728,729
                                   ===========   ========  ==========  ===========
</TABLE>

    Interest income recognized on securities for the years ended December 31,
    1995, 1994 and 1993 is as follows:

<TABLE>
<CAPTION>
                                                Interest Income
                                   ----------------------------------------
                                        1995          1994         1993
                                   ------------  ------------  ------------
 
<S>                                <C>           <C>           <C>
    U.S. Treasury                  $  3,076,983  $  2,576,898  $  2,276,720
    U.S. Government agencies          2,065,430     1,526,221     1,546,237 
    Other                                12,862        12,436        12,432
                                   ------------  ------------  ------------
 
                                   $  5,155,275  $  4,115,555  $  3,835,389
                                   ============  ============  ============
</TABLE>

    The amortized cost and estimated market value of securities at December 31,
    1995, by contractual maturity, are shown below. Expected maturities may
    differ from contractual maturities because borrowers may have the right to
    call or prepay obligations with or without call or prepayment penalties.

<TABLE>
<CAPTION>
                                                              Aggregate
                                             Amortized Cost  Fair Value
                                             --------------  -----------
<S>                                          <C>             <C>
    Held to maturity securities:
      Due in one year or less                  $ 7,819,784   $ 7,800,450
      Due after one year through five years     13,056,456    13,120,197
                                               -----------    ----------
                                                              
                                                20,876,240    20,920,647
    Mortgage-backed securities                  23,253,668    23,296,755
                                               -----------    ----------
                                                              
                                               $44,129,908   $44,217,402
                                               ===========   ===========
</TABLE> 

                                      F-19
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


<TABLE>
<CAPTION>
                                                              Aggregate
                                             Amortized Cost  Fair Value
                                             --------------  -----------
<S>                                          <C>             <C>
    Available for sale securities:
      Due in one year or less                  $20,664,149   $20,626,893
      Due after one year through five years     17,553,540    17,738,626
      Due after ten years                          217,200       217,200
                                               -----------    ----------
 
                                                38,434,889    38,582,719
      Mortgage-backed securities                   925,257       960,817
                                               -----------    ----------
 
                                               $39,360,146   $39,543,536
                                               ===========   ===========
</TABLE>

    Proceeds from sales of available for sale securities during 1995 were
    $1,019,688. Gross losses of $10,085 and gross gains of $4,110 were realized
    on those sales.

    In December 1995, the Company utilized a one time opportunity to transfer
    securities from the held to maturity portfolio to the available for sale
    portfolio as permitted by the FASB's implementation guide to SFAS 115. The
    Company transferred securities with a book value of $12,478,793. The
    securities transferred had unrealized gains in the amount of $191,578.

    Securities having an aggregate carrying value of $34,766,412 and
    $36,175,403 as of December 31, 1995 and 1994, respectively, were pledged to
    collateralize public deposits as required by law.

3.  Reserve for Possible Loan Losses:
    -------------------------------- 

    An analysis of the reserve for possible loan losses for the years ended
    December 31, 1995, 1994 and 1993 is as follows:

<TABLE>
<CAPTION>
                                     1995        1994        1993
                                  ----------  ----------  ----------
     <S>                          <C>        <C>        <C>
     Balance, beginning of year   $  793,969  $  823,690  $  725,490
       Provision charged to
        (benefiting) operations       10,000     (90,000)
       Losses charged to reserve      (2,754)     (4,349)    (64,055)
       Recoveries on loans
        charged off                   33,716      64,628     162,255
                                  ----------  ----------  ----------

     Balance, end of year         $  834,931  $  793,969  $  823,690
                                  ==========  ==========  ==========
</TABLE>

    There were $72,290, $256,750 and $308,530 of loans as to which interest
    income was not being accrued as of December 31, 1995, 1994 and 1993,
    respectively. If these loans had been accruing interest throughout the
    entire year, related income would have been increased by $5,178, $9,023 and
    $18,865 in 1995, 1994 and 1993, respectively.

                                      F-20
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


4.   Bank Premises and Equipment:
     ---------------------------

     Bank premises and equipment as of December 31, 1995 and 1994 consisted of:

<TABLE>
<CAPTION>
                                               Accumulated
                                               Depreciation
          1995                 Asset Cost    and Amortization      Net
          ----                ------------   ----------------   ----------
<S>                           <C>            <C>                <C>
    Land                        $1,798,391                      $1,798,391
    Building                     1,282,168      $  342,919         939,249
    Vehicles                        59,069          15,335          43,734
    Furniture and equipment      1,218,538         843,287         375,251
    Leasehold improvements         641,622         268,069         373,553
                                ----------      ----------      ----------
                                                                 
                                $4,999,788      $1,469,610      $3,530,178
                                ==========      ==========      ==========

           1994                                                  
           ----                                                  
                                                                 
    Land                        $1,798,391                      $1,798,391
    Building                     1,228,356      $  305,737         922,619
    Vehicles                        40,588          33,631           6,957
    Furniture and equipment      1,006,097         745,633         260,464
    Leasehold improvements         624,944         203,198         421,746
                                ----------      ----------      ----------
                                                                 
                                $4,698,376      $1,288,199      $3,410,177
                                ==========      ==========      ==========
</TABLE>                      

     Depreciation and amortizati---on expense was $209,375, $162,178 and
     $137,422 for the years ended December 31, 1995, 1994 and 1993,
     respectively.


5.   Time Deposits:
     ------------- 

     Time certificates of deposit of $100,000 or more totaled $45,459,123,
     $39,367,293 and $22,252,930 at December 31, 1995, 1994 and 1993,
     respectively. Interest expense related to these certificates of deposit
     totaled $1,773,723, $886,275 and $833,788 for the years ended December 31,
     1995, 1994 and 1993, respectively.

                                      F-21
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


6.   Provision for Federal Income Tax:
     -------------------------------- 

     The provisions for federal income tax for the years ended December 31,
     1995, 1994 and 1993 are as follows:

<TABLE>
<CAPTION>
                                  1995        1994        1993
                               ----------   --------   --------
<S>                            <C>          <C>         <C>
            Current            $1,202,185   $946,051   $887,752
            Deferred               13,015      2,149    (11,779)
                               ----------   --------   --------
                                                        
                               $1,215,200   $948,200   $875,973
                               ==========   ========   ========
</TABLE>

     The provision for deferred income tax results from changes in the amounts
     of deferred tax liabilities and assets arising from the expected future tax
     consequences of temporary differences between the tax basis and financial
     reporting basis of assets and liabilities. The principal sources of these
     differences relate to the provision for possible loan losses, depreciation,
     deferred compensation and the unrealized gain or loss on available for sale
     securities.

     The gross deferred tax liability and asset at December 31, 1995 are $99,324
     and $223,631, respectively. There is no valuation allowance related to the
     deferred tax asset. The Company had a current tax receivable of $39,236 as
     of December 31, 1995 and a current tax liability of $122,651 as of December
     31, 1994.

     The Company's effective tax rate for the years ended December 31, 1995,
     1994 and 1993 was 34.5%, 34.3% and 32.6%, respectively. This rate differs
     from the federal statutory tax rate of 34.0% principally due to the tax
     treatment of company owned life insurance policies and other miscellaneous
     items.
    
     Deferred tax assets and liabilities at December 31, 1995, 1994, and 1993 
     consisted of the following:

<TABLE> 
<CAPTION> 

     Deferred tax assets                                      1995          1994        1993
                                                              ----          ----        ----
     <S>                                                   <C>           <C>         <C> 
             Loan loss reserve                             $  111,390    $  107,990  $  138,590
             Bank premises and equipment                       65,249        69,212      84,224
             Unrealized loss on investment securities               -       422,213           -
             Accrued liabilities and other                     46,992       118,509      68,137
                                                           ------------------------------------
                                                              223,631       717,924     290,951
                                                           ------------------------------------

     Deferred tax liabilities
             Unrealized gain on investment securities        (62,353)             -           -
             Miscellaneous                                   (36,971)       (31,964)    (27,204)
                                                           ------------------------------------
                                                             (99,324)       (31,964)    (27,204)
                                                           ------------------------------------
                                                           ------------------------------------
     Net deferred tax asset                                $ 124,307     $  685,960  $  263,747
                                                           ====================================
</TABLE> 

                                      F-22
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


7.   Related Party Transactions:
     -------------------------- 

     Total loan activity to directors and shareholders owning more than 5% of
     the common stock of the Company, entities in which executive officers and
     directors are involved, and affiliated and other indirectly related
     entities for the years ended December 31, 1995 and 1994 is as follows:

<TABLE>
<CAPTION>
                                      December 31,
                                ------------------------
                                    1995        1994
                                -----------  -----------
 
<S>                             <C>          <C>
    Beginning balance of loans  $ 5,158,809  $ 4,311,090
      Additional loans            1,199,000    2,340,019
      Payments                   (1,851,024)  (1,492,300)
                                -----------  ----------- 

    Ending balance of loans     $ 4,506,785  $ 5,158,809
                                ===========  ===========
</TABLE>

     Payments to directors for directors' fees amounted to $127,600, $129,600
     and $130,200 for the years ended December 31, 1995, 1994 and 1993,
     respectively.

8.   Commitments and Contingencies:
     ----------------------------- 

     The Company leases its Hillcrest location under a ten-year lease agreement
     expiring in December 1999. The monthly rental on this location was $6,500
     for the years ended December 31, 1994 and 1993. Effective January 1, 1995,
     the monthly rental increased to $7,250 for the remaining lease period.

     In December 1994, the Company entered into a ten-year lease for a new
     operations center in a building next to the Hillcrest location. The lease
     provides for monthly payments of $4,920 for the period from February 1,
     1994 through January 31, 1995. The monthly rental increases by an
     adjustment based on the Consumer Price Index each February 1 thereafter.

     In December 1995, the Company entered into a five-year lease for a building
     to be used for future expansion next to the operations center.  The lease
     provides for monthly payments of $5,867 through November 30, 2000.

                                      F-23
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     Minimum future lease payments over the term of the aforementioned leases
     are as follows:

<TABLE>
<CAPTION>
                                         Amount
                                       ----------
                <S>                     <C>
                1996                   $  219,468
                1997                      219,599
                1998                      219,599
                1999                      219,599
                2000                      126,732
                Thereafter                191,779
                                       ----------
                                         
                                       $1,196,776
                                       ==========
</TABLE>

     Total rent expense was $153,368, $132,120 and $78,000 for each of the years
     ended December 31, 1995, 1994 and 1993, respectively.


9.   Stock Options:
     ------------- 

     The Company maintains a Nonqualified Stock Option Plan ("the Plan"). At
     inception, the Plan authorized the grant of options for a maximum aggregate
     of 200,000 shares of the Company's common stock to employees, officers and
     directors of the Company. The Plan also calls for the number of authorized
     options to increase in proportion to any increase in the number of
     outstanding common shares resulting from the issuance of stock dividends.
     This provision has resulted in an increase in the number of authorized
     options to 292,820 as of December 31, 1994. The Plan is administered by the
     Board of Directors and continues in effect for a term of ten years. All
     options granted under the Plan become exercisable in the amounts and at the
     intervals specified by the Board at the time of grant. Options outstanding
     have been restated to reflect the 10% stock dividends declared on June 30,
     1993, 1994 and 1995.

                                      F-24
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     Activity in the Plan for the three years ended December 31, 1995 is as
     follows:

<TABLE>
<CAPTION>
                                          Shares       Option Price
                                         -------     -----------------
<S>                                       <C>        <C>
    Outstanding, January 1, 1993          177,424     $  6.21 - $ 10.52
      Granted                              30,588     $ 13.23    
                                         --------    
                                                                
    Outstanding, December 31, 1993        208,012     $  6.21 - $ 13.23
      Granted                              44,327     $ 13.23 - $ 15.45
                                         --------                
                                                                
    Outstanding, December 31, 1994        252,339     $  6.21 - $ 15.45
      Granted                               3,325     $ 17.00    
      Exercised                            (1,926)    $  6.52 - $ 13.23
      Expired                              (3,035)    $  6.21 - $ 15.45
                                         --------                
                                                                
    Outstanding, December 31, 1995        250,703     $  6.21 - $ 17.00
                                         ========    
</TABLE>

     Of the options outstanding at December 31, 1995, options to purchase
     212,582 shares are currently exercisable. The remaining options are
     exercisable in increments of 20% each year beginning six months from the
     date of grant. All options expire ten years from the date of grant and
     those currently outstanding expire from 1997 to 2005. Common shares
     authorized and unissued have been reserved for the 322,102 shares subject
     to the Plan.

10.  Profit Sharing Plan:
     ------------------- 

     On January 1, 1993 the Company implemented a voluntary 401(k) Profit
     Sharing Plan. Generally, employees may voluntarily contribute up to 15% of
     their pre-tax salary to the plan. The Company has elected to make
     discretionary matching contributions equal to a percentage of the
     employee's contribution. The percentage match is determined by the Company
     each year and was 50% up to 4% of each employee's salary during 1993, 1994
     and 1995. Employees vest in the plan ratably over five years after one year
     of service. The charge to expense in connection with the Company's matching
     contributions was $49,178, $47,333 and $37,000 for the years ended December
     31, 1995, 1994 and 1993, respectively.

11.  Minority Interest:
     ----------------- 

     Minority interest in subsidiaries includes the minority common stock
     shareholders' proportionate share in the common stock equity of the Bank.

                                      F-25
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


12.  Convertible Subordinated Notes:
     ------------------------------ 

     Bancshares issued $1,125,000 of convertible subordinated promissory notes
     on July 1, 1991 and $250,000 in January 1992. The notes were due to mature
     July 1, 2003 and paid interest quarterly at prime plus 3/4%. The notes were
     convertible into 111.14 shares of Bancshares' common stock for each $1,000
     of note principal. Bancshares could redeem all or part of the notes at any
     time by paying 105% of the principal plus accrued interest. Bancshares
     redeemed $50,000 of the notes during 1994 and the remaining $1,325,000 in
     December 1995.


13.  Stock Dividend and Earnings per Share:
     ------------------------------------- 

     On June 30, 1995, 1994 and 1993, Bancshares issued a 10% stock dividend to
     holders of its common stock resulting in 75,463, 68,609 and 62,445
     additional common shares, respectively. Cash totaling $1,640, $1,394 and
     $679 was paid in lieu of issuing fractional shares.

     All per share data has been adjusted to reflect the effect of the stock
     dividends.  The amounts of the shares outstanding for purposes of earnings
     per share calculations are as follows:

<TABLE> 
<CAPTION> 
                                            1995      1994       1993
                                            ----      ----       ----
<S>                                         <C>       <C>        <C> 

     weighted average shares outstanding    831,141   831,091    831,120     
     assumed stock options exercise         121,573    98,105     88,695
                                            -------   -------    -------
                                            952,714   929,196    919,815
                                            -------   -------    -------                               
                                            -------   -------    -------
</TABLE> 


14.  Regulatory Matters:
     ------------------ 

     The minimum qualifying total risk based capital ratio required by the
     Bank's regulatory authorities is 8%, of which at least 4% must consist of
     Tier 1 capital. As of December 31, 1995 the Bank's risk-adjusted capital
     adequacy ratio was 22.8% of which 21.6% consisted of Tier 1 capital.

     At December 31, 1995, the Bank's shareholders' equity includes
     approximately $3,809,593 of undistributed earnings of the Bank which may be
     distributed, only upon express consent of the Bank's regulators.


15.  Financial Instruments With Off-Balance-Sheet Risks:
     -------------------------------------------------- 

     In the normal course of business the Company is a party to financial
     instruments with off-balance-sheet risk to meet the financing needs of its
     customers. These financial instruments include commitments to extend credit
     and standby letters of credit, which are conditional commitments issued by
     the Company to guarantee the performance of a customer to a third party.
     The instruments involve, to varying degrees, elements of credit risk and
     interest rate risk in excess of the amount recognized in the financial
     statements.

                                      F-26
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     The Company's exposure to credit loss in the event of nonperformance by the
     other party to the financial instrument for loan commitments and standby
     letters of credit is represented by the contractual amount of those
     instruments. The Company uses the same credit standards in making
     commitments and conditional obligations as it does for on-balance-sheet
     instruments. The Company has no significant concentrations of credit risk
     with any individual counterparty to originate loans.

     The total contract amounts of financial instruments with off-balance-sheet
     risk are as follows:

<TABLE>
<CAPTION>
                                               December 31,
                                        -------------------------
                                            1995         1994
                                        -------------------------
<S>                                     <C>            <C>
    Loan commitments (unfunded)         $10,936,063    $8,950,642
    Standby letters of credit           $   821,705    $1,177,771
    Commercial letters of credit        $   132,000   
</TABLE>

     Since many of the letters of credit and loan commitments may expire without
     being drawn upon, the total contract amount does not necessarily represent
     future cash requirements. Loan commitments were made at prevailing market
     rates of interest, generally tied to the Company's base rate of interest as
     it changes from time to time, and expire on various dates through 1998. The
     Company evaluates each customer's creditworthiness on a case-by-case basis.
     The amount of collateral obtained, if deemed necessary by the Company, upon
     extension of credit, is based on management's credit evaluation of the
     counterparty. Collateral held varies but may include property, plant and
     equipment, accounts receivable and commercial real estate.


16.  Concentration of Credit Risk:
     ---------------------------- 

     The Company grants commercial and residential loans to customers primarily
     in its market area, which is made up of University Park, Highland Park and
     the surrounding communities. Although the Company has a diversified loan
     portfolio, its debtors' ability to honor their contracts is substantially
     affected by the general economic conditions of the region.

                                      F-27
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


17.  Fair Value of Financial Instruments:
     ----------------------------------- 

     Statement of Financial Accounting Standards No. 107, "Disclosures About
     Fair Value of Financial Instruments," requires disclosure of fair value
     information about financial instruments, whether or not recognized in the
     balance sheet, for which it is practicable to estimate that value. In cases
     where quoted market prices are not available, fair values are based on
     estimates using present value or other estimation techniques. Those
     techniques are significantly affected by the assumptions used, including
     the discount rate and estimates of future cash flows. Such techniques and
     assumptions, as they apply to individual categories of the Company's
     financial instruments, are as follows:

     .    Cash and federal funds sold: The carrying amounts for cash, due from
          banks, and federal funds sold is a reasonable estimate of those
          assets' fair value.

     .    Securities, including mortgage-backed securities: Fair values for
          these securities are based on quoted market prices, where available.
          If quoted market prices are not available, fair values are based on
          quoted market prices for similar securities.

     .    Loans:  For adjustable rate loans that reprice frequently and with no
          significant change in credit risk, the carrying amounts are a
          reasonable estimate of fair value. The fair value of other types of
          loans is estimated by discounting the future cash flows using the
          current rates at which similar loans would be made to borrowers with
          similar credit ratings and for the same remaining maturities.

     .    Deposit liabilities:  The fair value of demand deposits, savings
          accounts, and money market deposits is the amount on demand at the
          reporting date, that is, the carrying value. Fair value for
          certificates of deposits are estimated using a discounted cash flow
          calculation that applies interest rates currently being offered for
          deposits of similar remaining maturities.

     .    Securities sold under agreements to repurchase:  Securities sold under
          agreements to repurchase generally have an original term to maturity
          of less than thirty days and thus are considered short-term
          borrowings. Consequently, their carrying value is a reasonable
          estimate of fair value.

     .    Convertible subordinated notes:  Because the convertible subordinated
          notes are adjustable rate, the carrying amount is a reasonable
          estimate of fair value.

                                      F-28
<PAGE>
 
                          PARK CITIES BANCSHARES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, Continued


     .    Letters of credit:  The fair value of letters of credit is estimated
          using the fees currently charged to enter into similar agreements,
          taking into account the remaining terms of the agreements and the
          present creditworthiness of the counterparties.

     The following table presents the Company's financial assets, liabilities
     and unrecognized financial instruments at both their respective carrying
     amount and fair value as of December 31, 1995 and 1994:

<TABLE>
<CAPTION>
                                                   1995                    1994
                                        ------------------------  ------------------------
                                         Carrying                  Carrying
    Assets                                Amount     Fair Value     Amount      Fair Value
    ------                              -----------  -----------  -----------  -----------
<S>                                     <C>          <C>         <C>           <C>
    Cash and due from banks             $16,189,242  $16,189,242  $18,213,914  $18,213,914
    Federal funds sold                   36,000,000   36,000,000   23,000,000   23,000,000
    Held to maturity securities          44,129,908   44,217,402   63,303,658   60,762,768
    Available for sale securities        39,543,536   39,543,536   34,728,729   34,728,729
    Loans, net                           70,516,250   70,417,000   62,178,837   61,909,000
                                                                          
    Liabilities                                                           
    -----------
                                                                          
    Demand deposits                      54,163,303   54,163,303   53,742,575   53,742,575
    Interest-bearing demand deposits     70,504,641   70,504,641   72,467,004   72,467,004
    Savings deposits                      4,945,784    4,945,784    5,723,663    5,723,663
    Other time deposits                  65,421,255   65,646,000   58,345,816   58,307,000
    Securities sold under agreements                                      
    to repurchase                           460,000      460,000    2,490,000    2,490,000
    Convertible subordinated notes                                  1,325,000    1,325,000
                                                                          
    Unrecognized financial instruments                                    
    ----------------------------------                                    
                                                                          
    Letters of credit                             -       19,074            -       23,555
</TABLE>

     As discussed earlier, the fair value estimate of financial instruments for
     which quoted market prices are unavailable is dependent upon the
     assumptions used. Consequently, those estimates cannot be substantiated by
     comparison to independent markets and, in many cases, could not be realized
     in immediate settlement of the instruments. Accordingly, the aggregate fair
     value amounts presented in the above fair value table do not necessarily
     represent the underlying value of the Company.

                                      F-29
<PAGE>
 
                               INDEX TO EXHIBITS
                               -----------------

<TABLE> 
<CAPTION> 
Exhibit                                                                                          Sequentially
Number            Description of Exhibits                                                        Numbered Page
- ------            -----------------------                                                        -------------
<C>      <S>                                                                                     <C> 
4.3      Trust Indenture for BOKF Notes Payable to Electing Shareholders of Park Cities.

5.0      Opinion of Frederic Dorwart dated November 13, 1997.

10.23    Agreement and Plan of Merger Among BOK Financial Corporation, BOK Merger
         Corporation Number Five and Park Cities Bancshares, Inc. dated October 3,
         1996.

13.1     BOKF Financial Annual Report on Form 10-K for the fiscal year ended
         December 31, 1995.

23.0     Consent of Independent Auditors.

23.1     Consent of Independent Auditors - Ernst & Young, LLP.

23.2     Consent of Independent Auditors - Coopers & Lybrand, L.L.P.
</TABLE> 

                                                              Page ____ of ____.

<PAGE>
 
                                  EXHIBIT 4.3

 Trust Indenture for BOKF Notes Payable to Electing Shareholders of Park Cities

                                                              Page ____ of ____.
<PAGE>
 
                                TRUST INDENTURE
                                ---------------

        This Trust Indenture ("Indenture") is made this _____ day of November,
1996 between:

             (i)     BOK Financial Corporation, an Oklahoma

                     corporation ("Issuer"); and,

             (ii)    The Bank of New York, a New York banking

                     corporation ("Trustee").

        In consideration of the mutual promises hereinafter set forth, and
intending to be legally bound hereby, Issuer and Trustee agree as follows:

(1)     Purpose of this Agreement. Issuer, BOKF Merger Corporation Number Five
        -------------------------
        ("BOKSub"), and Park Cities Bancshares, Inc. ("Park Cities") have
        heretofore entered into that certain Agreement and Plan of Merger dated
        October 3, 1996 (the "Merger Agreement"). Each capitalized term used in
        this Indenture shall have the meaning ascribed to it in the Merger
        Agreement unless otherwise expressly defined herein. Pursuant to
        Sections 1.5 and 1.6 of the Merger Agreement, Issuer will, on or about
        February 12, 1997, issue BOKF Notes to Park Cities Shareholders. The
        BOKF Notes will be issued pursuant to a registration statement filed by
        the Issuer with the Securities and Exchange Commission on Form S-4 (the
        "Registration Statement"). The BOKF Notes are subject to the Trust
        Indenture Act of 1939 (the "Act"). The BOKF Notes will be issued under
        this Indenture. The purpose of this Indenture is to set forth the
        obligations of the Trustee respecting the BOKF Notes. The rights and
        obligations of the Issuer and the Trustee hereafter set forth relate to
        the BOKF Notes.

(2)     Eligibility of Trustee. The Trustee shall maintain the qualifications
        ----------------------
        required by Section 310 of the Act.

                                                              Page ____ of ____.
<PAGE>
 
(3)     Disqualification of Trustee. The Trustee shall be disqualified to serve
        ---------------------------
        as Trustee in the event any of the causes of disqualification set forth
        in Section 310(b) of the Act should occur. In the event the Trustee
        becomes disqualified in accordance with the provisions of this
        paragraph, the Issuer and the Trustee shall forthwith cause the
        appointment of a successor trustee meeting the qualifications of Section
        310 of the Act.

(4)     Preferential Collection of BOKF Notes. The Trustee shall comply with the
        -------------------------------------
        terms and conditions of Section 311 of the Act.

(5)     List of BOKF Note Holders. The Issuer shall comply with the provisions
        -------------------------
        of Section 312(a) of the Act. The Trustee shall comply with the terms
        and provisions of Section 312(b) of the Act.

(6)     Reports by Trustee. The Trustee shall comply with the provisions of
        ------------------
        Section 313 of the Act.

(7)     Reports By Issuer. The Issuer shall comply with the provisions of
        -----------------
        Section 314(a) of the Act.

(8)     Duties of Trustee.
        -----------------

        (a)    Prior to Default (determined in accordance with the terms and
               provisions of the BOKF Notes), (i) the Trustee shall not be
               liable except for the performance of such duties as are
               specifically set out in this Indenture and no implied covenants
               or obligations shall be read into this Indenture against the
               Trustee; and (ii) in the absence of bad faith on its part, the
               Trustee may conclusively rely, as to the truth of the statements
               and the correctness of the opinions expressed therein, upon
               certificates or opinions furnished to the Trustee and conforming

                                                              Page ____ of ____.

                                     - 2 -
<PAGE>
 
               to the requirements of this Indenture; but in the case of any
               such certificates or opinions which by any provision hereof are
               specifically required to be furnished to the Trustee, the Trustee
               shall be under a duty to examine the same to determine whether or
               not they conform to the requirements of this Indenture (but need
               not confirm or investigate the accuracy of mathematical
               calculations or other facts stated therein).

        (b)    In case a Default has occurred and is continuing, the Trustee
               shall exercise such of the rights and powers vested in it by this
               Indenture, and use the same degree of care and skill in their
               exercise, as a prudent person would exercise or use under the
               circumstances in the conduct of his or her own affairs.

        (c)    No provision of this Indenture shall be construed to relieve the
               Trustee from liability for its own negligent action, its own
               negligent failure to act, or its own wilful misconduct, except
               that:

               (i)    this Subsection shall not be construed to limit the
                      effect of Subsection (a) of this Section;

               (ii)   the Trustee shall not be liable for any error of judgment
                      made in good faith by a responsible officer of the
                      Trustee, unless it shall be proved that the Trustee was
                      negligent in ascertaining the pertinent facts;


                                                              Page ____ of ____.

                                     - 3 -
<PAGE>
 
               (iii)  the Trustee shall not be liable with respect to any action
                      taken or omitted to be taken by it in good faith in
                      accordance with the direction of the holders of a majority
                      in principal amount of the outstanding BOKF Notes,
                      relating to the time, method and place of conducting any
                      proceeding for any remedy available to the Trustee, or
                      exercising any trust or power conferred upon the Trustee,
                      under this Indenture with respect to the BOKF Notes of
                      such series; and

               (iv)   no provision of this Indenture shall require the Trustee
                      to expend or risk its own funds or otherwise incur any
                      financial liability in the performance of any of its
                      duties hereunder, or in the exercise of any of its rights
                      or powers, if it shall have reasonable grounds for
                      believing that repayment of such funds or adequate
                      indemnity against such risk or liability is not reasonably
                      assured to it.

        (d)    Whether or not therein expressly so provided, every provision of
               this Indenture relating to the conduct or affecting the liability
               of or affording protection to the Trustee shall be subject to the
               provisions of this Section.

                                                              Page ____ of ____.

                                     - 4 -
<PAGE>
 
        (e)    The Trustee shall comply with the provisions of Section 315(b)
               and Section 315(c) of the Act.

        (f)    The Trustee shall not be liable for any error of judgment within
               the meaning of Section 315(d)(2) of the Act.

        (g)    The Trustee shall not be liable for any action taken or omitted
               to be taken within the meaning of Section 315(d)(3) of the Act.

(9)     Certain Rights of Trustee.  Subject to the provision of Section 8:
        -------------------------

        (a)    the Trustee may rely and shall be protected in acting or
               refraining from acting upon any resolution, certificate,
               statement, instrument, opinion, report, notice, request,
               direction, consent, order, bond, debenture, note, other evidence
               of indebtedness or other paper or document believed by it to be
               genuine and to have been signed or presented by the proper party
               or parties;

        (b)    whenever in the administration of this Indenture the Trustee
               shall deem it desirable that a matter be proved or established
               prior to taking, suffering or omitting any action hereunder, the
               Trustee (unless other evidence be herein specifically prescribed)
               may, in the absence of bad faith on its part, conclusively rely
               upon an officers' certificate of the Issuer;

        (c)    the Trustee may consult with counsel of its selection and the
               advice of such counsel or any opinion of counsel shall be full
               and complete authorization and protection in respect of any
               action taken, suffered or omitted by it hereunder in good faith
               and in reliance thereon;

                                                              Page ____ of ____.

                                     - 5 -
<PAGE>
 
        (d)    the Trustee shall be under no obligation to exercise any of the
               rights or powers vested in it by this Indenture at the request or
               direction of any of the holders pursuant to this Indenture,
               unless such holders shall have offered to the Trustee reasonable
               security or indemnity against the costs, expenses and liabilities
               which might be incurred by it in compliance with such request or
               direction;

        (e)    the Trustee shall not be bound to make any investigation into the
               facts or matters stated in any resolution, certificate,
               statement, instrument, opinion, report, notice, request,
               direction, consent, order, bond, debenture, note, other evidence
               of indebtedness or other paper or document, but the Trustee, in
               its discretion, may make such further inquiry or investigation
               into such facts or matters as it may see fit, and, if the Trustee
               shall determine to make such further inquiry or investigation, it
               shall be entitled to examine the books, records and premises of
               the Issuer, personally or by agent or attorney at the sole cost
               of the Issuer and shall incur no liability or additional
               liability of any kind by reason of such inquiry or investigation;

        (f)    the Trustee may execute any of the trusts or powers hereunder or
               perform any duties hereunder either directly or by or through
               agents or attorneys and the Trustee shall not be responsible for
               any misconduct or negligence on the part of any agent or attorney
               appointed with due care by it hereunder; and

                                                              Page ____ of ____.

                                     - 6 -
<PAGE>
 
        (g)    the Trustee shall not be liable for any action taken, suffered,
               or omitted to be taken by it in good faith and reasonable
               believed by it to be authorized or within the discretion or
               rights or powers conferred upon it by this Indenture.

(10)    No Impairment of Rights of a Holder of a BOKF Note. No rights of any
        --------------------------------------------------
        holder of a BOKF Note shall be impaired or affected without the consent
        of such holder in any manner prohibited by Section 316(b) of the Act.

(11)    Special Powers of Trustee. The Trustee shall have the powers described
        -------------------------
        in Section 317(a) of the Act. The Trustee shall comply with Section
        317(b) of the Act.

(12)    Interpretation of This Indenture. The provisions of this Indenture shall
        --------------------------------
        be interpreted in such manner as to comply with the Act and the rules
        and regulations of the Securities and Exchange Commission promulgated
        thereunder.

(13)    Issuer's Covenant to Pay BOKF Notes. The Issuer shall timely pay all
        -----------------------------------
        amounts due under the BOKF Notes and shall timely perform in all
        material respects all its other obligations arising under the BOKF
        Notes.

(14)    Indemnification by Issuer. The Issuer hereby covenants and agrees to
        -------------------------
        reimburse the Trustee and indemnify and hold the Trustee harmless
        against any costs, expenses (including reasonable attorney fees and
        expenses) losses or damages arising in whole or in part from any breach
        by Issuer of any of its obligations arising under this Indenture.

(15)    Conditions Precedent. The Issuer shall comply with Section 314(c) and
        --------------------
        314(e) of the Act.

                                                              Page ____ of ____.

                                     - 7 -
<PAGE>
 
(16)    Undertaking for Costs. In any suit for the enforcement of any right or
        ---------------------
        remedy under this Indenture or in any suit against the Trustee for any
        action taken or omitted by it as a Trustee, a court in its discretion
        may require the filing by any party litigant in the suit of an
        undertaking to pay the costs of the suit, and the court in its
        discretion may assess reasonable costs, including reasonable attorney's
        fees and expenses, against any party litigant in the suit, having due
        regard to the merits and good faith of the claims or defenses made by
        the party litigant. This Section 16 does not apply to a suit by the
        Trustee, or a suit by Holders of more than 10% in principal amount of
        the then outstanding BOKF Notes.

(17)    Not Responsible for Recitals or Issuance of BOKF Notes. The recitals
        ------------------------------------------------------
        contained herein and in the BOKF Notes, shall be taken as the statements
        of the Issuer, and the Trustee assumes no responsibility for their
        correctness. The Trustee makes no representations as to the validity or
        sufficiency of this Indenture or of the BOKF Notes. The Trustee shall
        not be accountable for the use or application by the Issuer of BOKF
        Notes or the proceeds thereof.

(18)    May Hold BOKF Notes. The Trustee, in its individual or any other
        -------------------
        capacity, may become the owner or pledgee of BOKF Notes and, may
        otherwise deal with the Issuer with the same rights it would have if it
        were not Trustee.

(19)    Money Held in Trust. Money held by the Trustee in trust hereunder need
        -------------------
        not be segregated from other funds except to the extent required by law.
        The Trustee shall be under no liability for interest on any money
        received by it hereunder except as otherwise agreed in writing with the
        Issuer.

(20)    Compensation and Reimbursement.  The Issuer agrees:
        ------------------------------

                                                              Page ____ of ____.

                                     - 8 -
<PAGE>
 
        (a)    to pay to the Trustee from time to time such compensations as the
               Issuer and the Trustee shall from time to time agree in writing
               for all services rendered by it hereunder (which compensation
               shall not be limited by any provision of law in regard to the
               compensation of a trustee of an express trust);

        (b)    except as otherwise expressly provided herein, to reimburse the
               Trustee upon its request for all reasonable expenses,
               disbursements and advances incurred or made by the Trustee in
               accordance with any provision of this Indenture (including the
               compensation and the expenses and disbursements of its agents and
               counsel), except any such expense, disbursement or advance as may
               be attributable to its negligence or bad faith; and

The Trustee shall have a lien prior to the BOKF Notes as to all property and
funds held by it hereunder for any amount owing it or any predecessor Trustee
pursuant to this Section, except with respect to funds held in trust for the
benefit of the holders of particular BOKF Notes.

        When the Trustee incurs expenses or renders services in connection with
an event of default the expenses (including the reasonable charges and expenses
of its counsel) and the compensation for the services are intended to constitute
expenses of administration under any applicable Federal or state bankruptcy,
insolvency or other similar law. The provisions of this Section shall survive
the termination of this Indenture. 

(21)    Miscellaneous Provisions. The following miscellaneous provisions shall
        ------------------------
apply to this Indenture:

                                                              Page ____ of ____.

                                     - 9 -
<PAGE>
 
        (a)    All notices or advices required or permitted to be given by or
               pursuant to this Indenture shall be given in writing. All such
               notices and advices shall be (i) delivered personally, (ii)
               delivered by facsimile or delivered by U.S. Registered or
               Certified Mail, Return Receipt Requested mail, or (iii) delivered
               for overnight delivery by a nationally recognized overnight
               courier service. Such notices and advices shall be deemed to have
               been given (i) the first business day following the date of
               delivery if delivered personally or by facsimile, (ii) on the
               third business day following the date of mailing if mailed by
               U.S. Registered or Certified Mail, Return Receipt Requested, or
               (iii) on the date of receipt if delivered for overnight delivery
               by a nationally recognized overnight courier service. All such
               notices and advices and all other communications related to this
               Indenture shall be given as follows:

               If to Issuer:         Chief Executive Officer
                                     BOK Financial Corporation
                                     P.O. Box 2300
                                     Tulsa, Oklahoma 74192
                                     (918) 588-6000 - Telephone
                                     (918) 588-6853 - Facsimile
               
               If to Trustee:        The Bank of New York
                                     101 Barclay Street, 21-W
                                     New York, New York 10286
                                     (212) 815-6285 - Telephone
                                     (212) 815-5915 - Facsimile
               
               With Copy to:         Frederic Dorwart
                                     Old City Hall
                                     124 East Fourth Street
                                     Tulsa, OK 74103
                                     (918) 583-9945 - Telephone
                                     (918) 583-8251 - Facsimile

                                                              Page ____ of ____.

                                     - 10 -
<PAGE>
 
               or to such other address as the party may have furnished to the
               other parties in accordance herewith, except that notice of
               change of addresses shall be effective only upon receipt.

        (b)    This Indenture shall be deemed made in New York, New York.

        (c)    This Indenture shall be subject to, and interpreted by and in
               accordance with, the laws (excluding conflict of law provisions)
               of the State of New York.

        (d)    This Indenture is The entire agreement of the parties respecting
               the subject matter hereof. There are no other agreements,
               representations or warranties, whether oral or written,
               respecting the subject matter hereof.

        (e)    This Indenture, and all the provisions of this Indenture, shall
               be deemed drafted by all of the parties hereto.

        (f)    This Indenture, shall not be interpreted strictly for or against
               any party, but solely in accordance with the fair meaning of the
               provisions hereof to effectuate the purposes and interest of this
               Indenture.

        (g)    Each of the persons signing below on behalf of a party hereto
               represents and warrants that he or she has full requisite power
               and authority to execute and deliver this Indenture, on behalf of
               the parties for whom he or she is signing and to bind such party
               to the terms and conditions of this Indenture.

        (h)    This Indenture may be executed in counterparts, each of which
               shall be deemed an original. This Indenture shall become
               effective only

                                                              Page ____ of ____.

                                    - 11 -
<PAGE>
 
               when all of the parties hereto shall have executed the original
               or counterpart hereof. This Indenture may be executed and
               delivered by a facsimile transmission of a counterpart signature
               page hereof.

        (i)    In any action brought by a party hereto to enforce the
               obligations of any other party hereto, the prevailing party shall
               be entitled to collect from the opposing party to such action
               such party's reasonable litigation costs and attorneys fees and
               expenses (including court costs, reasonable fees of accountants
               and experts, and other expenses incidental to the litigation).

        (j)    This Indenture shall be binding upon and shall inure to the
               benefit of the parties and their respective successors and
               assigns.

        (k)    This is not a third party beneficiary contract except this
               Indenture is made for the benefit of holders of BOKF Notes. No
               person or entity other than a party signing this Indenture shall
               have any rights under this Indenture, except holders of BOKF
               Notes.

        (l)    This Indenture may be amended or modified only in a writing which
               specifically references this Indenture.

        (m)    This Indenture may not be assigned (including material
               performance by subcontract) by any party hereto.

        (n)    A party to this Indenture may decide or fail to require full or
               timely performance of any obligation arising under this
               Indenture. The decision or failure of a party hereto to require
               full or timely performance of any obligation arising under this
               Indenture (whether

                                                              Page ____ of ____.

                                    - 12 -
<PAGE>
 
               on a single occasion or on multiple occasions) shall not be
               deemed a waiver of any such obligation. No such decisions or
               failures shall give rise to any claim of estoppel, laches, course
               of dealing, amendment of this Indenture by course of dealing, or
               other defense of any nature to any obligation arising hereunder.

        (o)    The repudiation, breach, or failure to perform any obligation
               arising under this Indenture by a party after reasonable notice
               thereof shall be deemed a repudiation, breach, and failure to
               perform all of such party's obligations arising under this
               Indenture.

        (p)    Time is of the essence with respect to each obligation arising
               under this Indenture. The failure to timely perform an obligation
               arising hereunder shall be deemed a failure to perform the
               obligation.

        (q)    In the event any provision of this Indenture, or the application
               of such provision to any person or set of circumstances, shall be
               determined to be invalid, unlawful, or unenforceable to any
               extent for any reason, the remainder of this Indenture, and the
               application of such provision to persons or circumstances other
               than those as to which it is determined to be invalid, unlawful,
               or unenforceable, shall not be affected and shall continue to be
               enforceable to the fullest extent permitted by law.

        (r)    Any cause of action for a breach or enforcement of, or a
               declaratory judgment respecting, this Indenture shall be
               commenced and maintained only in the United States District Court
               for the Southern

                                                              Page ____ of ____.

                                    - 13 -
<PAGE>
 
               District of New York or the applicable New York state trial court
               sitting in New York, New York and having subject matter
               jurisdiction.

Dated and effective the date first set forth above.

                                BOK FINANCIAL CORPORATION,
                                an Oklahoma corporation

                             By 
                                -------------------------------------------

                                      "Issuer"

                                THE BANK OF NEW YORK,
                                  a New York banking corporation

                             By 
                                -------------------------------------------

                                      "Trustee"


                                                              Page ____ of ____.

                                     - 14 -

<PAGE>
 
                                  EXHIBIT 5.0

              Opinion of Frederic Dorwart dated November 13, 1997







                                                              Page ____ of ____.

                                     - 15 -
<PAGE>
 
                               November 15, 1996



To:      BOK FINANCIAL CORPORATION
         P.O. Box 2300
         Tulsa, OK 74192

Subject: BOK Financial Corporation Registration Statement on SEC Form S-4 to be
         filed November 13, 1996 in Connection with the Issuance of up to
         $51,978,000 in Principal Amount of BOK Financial Promissory Notes in
         the Merger of BOKF Merger Corporation Number Five into Park Cities
         Bancshares, Inc.
         -------------------------------------------------------------------

Ladies and Gentlemen:

         I have acted as counsel to BOK Financial Corporation ("BOK Financial")
in connection with BOK Financial's Registration Statement on SEC Form S-4 being
filed on November 15, 1996 with the Securities and Exchange Commission with
respect to the issuance of up to $51,978,000 in principal amount of BOK
Financial promissory notes in connection with the merger of BOKF Merger
Corporation Number Five into Park Cities Bancshares, Inc.

         I have reviewed BOK Financial's Registration Statement, BOK Financial's
Certificate of Incorporation, BOK Financial's Bylaws, and such other corporate
records and proceedings of BOK Financial as I have deemed appropriate for the
purposes of rendering this opinion. In my opinion, the promissory notes of BOK
Financial being issued, as contemplated by the Registration Statement, will be,
when issued, duly and validly issued, fully paid and non-assessable. I hereby
consent to the filing of this opinion as an exhibit to the Registration
Statement and to the use of my name in the prospectus included in the
Registration Statement under the caption "Legal Opinions".


                                       /s/  Frederic Dorwart
                                     -------------------------------------------
                                     Frederic Dorwart






                                                              Page ____ of ____.

                                    - 16 -

<PAGE>
 
                   EXHIBIT 10.23

           Agreement and Plan of Merger Among BOK Financial   
           Corporation, BOK Merger Corporation Number Five and           
           Park Cities Bancshares, Inc. dated October 3, 1996             







                                                              Page ____ of ____.

                                     - 17 -
<PAGE>
 
                                                                   EXHIBIT 10.23

                         AGREEMENT AND PLAN OF MERGER

     This AGREEMENT AND PLAN OF MERGER ("Agreement"), dated as of October 3,
1996, is entered into by and among BOK Financial Corporation, an Oklahoma
Corporation, ("BOKF"), BOKF Merger Corporation Number Five, a Texas corporation
and a wholly-owned subsidiary of BOKF ("BOKSub"), and Park Cities Bancshares,
Inc., a Texas corporation ("Park Cities").

     WHEREAS, BOKF is a registered bank holding company under the Bank Holding
Company Act of 1956, as amended ("BHCA"), and BOKSub is a wholly-owned
subsidiary of BOKF; and

     WHEREAS, Park Cities is a registered bank holding company under the BHCA,
which controls First National Bank of Park Cities, a national banking
association ("FNB"); and

     WHEREAS, Park Cities owns all of the issued and outstanding capital stock
of Park Cities Corporation, a Nevada Corporation ("PC Corporation"); and

     WHEREAS, PC Corporation is a registered bank holding company under the
BHCA; and

     WHEREAS, PC Corporation owns all except 410 common shares of the issued and
outstanding capital stock of First National Bank of Park Cities, a national
banking association; and,

     WHEREAS, the respective Boards of Directors of each of BOKF and Park Cities
deem it advisable for BOKSub to merge with and into Park Cities; and

     WHEREAS, pursuant to the Merger, the shareholders of Park Cities will
receive consideration in an aggregate amount equal to $51,978,000, which is
$43.5679 per share of Park Cities Common Stock, par value $5.00 (assuming
exercise of all "Stock Options", as herein defined), subject to any adjustment
provided for herein.

     NOW, THEREFORE, for and in consideration of the mutual benefits to be
derived from this Agreement and of the representations, warranties, conditions,
and promises hereinafter contained, the parties hereto covenant and agree as
follows:

                                   ARTICLE I

                                  THE MERGER

         Section 1.1.  The Merger.  Pursuant to the terms and provisions of this
         -----------   ----------                                               
Agreement and the Texas Business Corporation Act (the "Corporate Law"), BOKSub
shall merge with and into Park Cities (the "Merger").

         Section 1.2.  Merging Corporation.   BOKSub shall be the merging
         -----------   -------------------                               
corporation under the Merger and its corporate identity and existence, separate
and apart from Park Cities, shall cease on consummation of the Merger.
<PAGE>
 
         Section 1.3.  Surviving Corporation. Park Cities shall be the surviving
         -----------   ---------------------
corporation in the Merger. No changes in the articles of incorporation or bylaws
of Park Cities shall be effected by the Merger. The officers and directors of
Park Cities after the Merger shall be the same as the officers and directors of
Park Cities as of the Effective Time (as defined in Section 9.2 below);
                                                    -----------
provided, however, Stanley A. Lybarger and James A. White shall, upon
consummation of the Merger, be additional members of the board of directors of
Park Cities. It is understood that some of the current directors of Park Cities
may elect to resign on or before the Effective Date.

         Section 1.4.  Effect of the Merger.  The Merger shall have all of the
         -----------   --------------------                                   
effects provided by the Corporate Law.  Park Cities, as the surviving
corporation, may, at any time after the Effective Time, take any action
(including executing and delivering any documents) in the name and on behalf of
either BOKSub or Park Cities as are appropriate in order to carry out and
effectuate the transactions contemplated by this Agreement.

         Section 1.5.  Merger Consideration; Conversion of Shares.
         -----------   ------------------------------------------ 

     (a) At the Effective Time, each share of common stock, par value $5.00, of
Park Cities ("Park Cities Common") then issued and outstanding, other than
shares the holders of which have duly exercised and perfected their dissenters'
rights under the Corporate Law, shall be automatically converted into the right
to receive an amount equal to $43.5679 per share (assuming exercise of all Stock
Options) which is an aggregate amount of $51,978,000 subject to any adjustment
provided in Section 1.5(b) below (the "Merger Consideration").  The Merger
            --------------                                                
Consideration shall be paid to each Park Cities shareholder as herein provided.

     (b) If the Merger is not consummated prior to March 31, 1997, for whatever
reason, the shareholders of Park Cities shall be entitled to an upward
adjustment to the Merger Consideration in the aggregate amount of:  the total
Merger Consideration to be paid to all shareholders (prior to such adjustment)
                                                                              
multiplied by the result of: (i) the number of days from and after March 31,
- ---------------------------                                                 
1997 multiplied by (ii) .0002778 (i.e. 1/360th of 10%).  For example, if the
     -------------                ---                                       
total Merger Consideration were $52,000,000 and the Closing Date is May 15,
1997, the Merger Consideration adjustment would be $650,052 (i.e. $52,000,000 x
                                                             ---               
(45 x .0002778)).

     (c) Park Cities, BOKF and BOKSub acknowledge and understand that (i) all
Stock Options shall be exercised immediately prior to consummation of the
Merger, (ii) all shares of Park Cities Common issuable upon exercise of the
Stock Options shall be deemed issued and outstanding immediately prior to the
consummation of the Merger, and (iii) full payment of the consideration for the
issuance of shares of Park Cities Common issuable upon such exercise of the
Stock Options shall be made in the manner provided for in Section 1.6(c) of this
                                                          --------------        
Agreement, and (iv) the Park Cities Common to be converted into the right to
receive the Merger Consideration shall include, without limitation, the Park
Cities Common to be issued upon the exercise of the Stock Options.

     (d) Each Park Cities shareholder may elect to receive the Merger
Consideration in any combination of (i) cash or (ii) a single Promissory Note
payable to the shareholder by BOKF ("BOKF Note").  Each BOKF Note shall (i) be
substantially in the form attached hereto as Exhibit "A" (the "BOKF Note" and
                                             -----------                     
collectively the "BOKF Notes"); (ii) bear interest at the rate per annum equal
to the "Applicable Federal Rate" as defined under the Internal Revenue Code of
1986, as amended, based upon the appropriate term of maturity; (iii) be due and
payable in

                                      -2-
<PAGE>
 
equal quarterly installments of interest with all principal and outstanding
interest due and payable on the final maturity date; and (iv) have final
maturity dates ranging (at the election of each Park Cities shareholder, as
hereafter provided) not less than one nor more than five years from the
Effective Time.  The BOKF Notes will be issued pursuant to a trust indenture
("Indenture") in form and substance satisfactory to Park Cities and BOKF, naming
a trustee satisfactory to Park Cities and BOKF, which will be qualified under
the Trust Indenture Act of 1939, as amended ("Trust Indenture Act"), unless an
exemption from such requirements under the Trust Indenture Act is available.

     (e) Unless a Park Cities shareholder (including holders of the Stock
Options) shall deliver to Park Cities not later than the meeting of shareholders
of Park Cities at which the shareholders vote on the question of approval of
this Agreement a written election ("BOKF Note Election") in a form approved by
counsel to BOKF (which approval shall not be unreasonably withheld or delayed)
to receive the Merger Consideration or part thereof in the form of a BOKF Note,
the shareholder shall be irrevocably deemed to have elected to receive the
Merger Consideration in all cash. The BOKF Notes shall be offered to the Park
Cities shareholders pursuant to the Proxy Statement/Prospectus (as defined in
Section 5.6).  Any Park Cities shareholder who has timely delivered the BOKF
- -----------                                                                 
Note Election may withdraw such election, and receive the Merger Consideration
in all cash, by delivering written notice to Park Cities to that effect not less
than twenty (20) days prior to the Closing Date.

     (f) At the Effective Time, all of the shares of Park Cities Common, by
virtue of the Merger and without any action on the part of the holders thereof,
shall no longer be outstanding and shall be cancelled and retired and shall
cease to exist, and each holder of any certificate or certificates which
immediately prior to the Effective Time represented outstanding shares of Park
Cities Common (the "Certificates") or of any holder of Stock Options shall
thereafter cease to have any rights with respect to such shares, except the
right of such holders to receive the Merger Consideration upon the surrender of
such Certificate or Certificates or exercise of such Stock Options in accordance
with Section 1.6.
     ----------- 

     (g) At the Effective Time, each share of Park Cities Common, if any, held
in the treasury of Park Cities immediately prior to the Effective Time shall be
canceled.

     (h) At the Effective Time, each share of common stock, par value $ 1.00 per
share, of BOKSub outstanding immediately prior to the Effective Time shall be
converted into one share of Park Cities Common.

     (i) If any holder of Park Cities Common is entitled to dissent from the
Agreement and Merger under the Corporate Law, any issued and outstanding shares
of Park Cities Common held by such dissenting holder ("Dissenting Shares") shall
not be converted as described in this  Section 1.5 but from and after the
                                      ------------                       
Effective Time shall represent only the right to receive such cash consideration
as may be determined to be due to such dissenting holder pursuant to the
Corporate Law; provided, however, that each share of Park Cities Common
outstanding immediately prior to the Effective Time and held by a dissenting
holder who shall, after the Effective Time, withdraw his demand for appraisal or
lose his right of appraisal shall have only such rights as are provided under
the Corporate Law.

                                      -3-
<PAGE>
 
         Section 1.6.  Exchange Procedures; Surrender of Certificates.
         -----------   ---------------------------------------------- 

     (a) The Bank of New York, or other entity mutually satisfactory to Park
Cities and BOKF, shall act as paying agent in the Merger (the "Paying Agent").
Immediately after the Effective Time, BOKF will cause Park Cities, as the
surviving corporation, to furnish the Paying Agent a corpus consisting of cash
and BOKF Notes sufficient in the aggregate for the Paying Agent to make full
payment of the Merger Consideration to the holders of all outstanding shares of
Park Cities Common (other than Dissenting Shares).

     (b) As soon as reasonably practicable after the Effective Time, the Paying
Agent shall be authorized, without any further action on the part of BOKF or
Park Cities, to mail to each record holder of any Certificate or Certificates
whose shares were converted into the right to receive the Merger Consideration,
a letter of transmittal (and instructions) for use in effecting the surrender of
the Certificates in exchange for the Merger Consideration.  Each such letter
(the "Merger Transmittal Letter") shall specify that delivery shall be effected,
and risk of loss and title to the Certificates shall pass, only upon proper
delivery of the Certificates to the Paying Agent and shall be in such form and
have such other provisions as BOKF may reasonably specify.  Upon surrender to
the Paying Agent of a Certificate, together with a Merger Transmittal Letter
duly executed and any other required documents, the holder of such Certificate
shall be entitled to receive in exchange therefor the Merger Consideration
forthwith upon such surrender solely in the form of cash or the BOKF Notes as
the shareholder shall elect in accordance with Section 1.5(d).  No interest on
                                               --------------                 
the Merger Consideration issuable upon the surrender of the Certificates shall
be paid or accrued for the benefit of holders of Certificates (other than any
interest on the BOKF Notes in accordance with their terms).  If the Merger
Consideration is to be issued to a person other than a person in whose name a
surrendered Certificate is registered, it shall be a condition of issuance that
the surrendered Certificate shall be properly endorsed or otherwise executed in
proper form for transfer and that the person requesting such issuance shall pay
to the Paying Agent any required transfer or other taxes or establish to the
satisfaction of the Paying Agent that such tax has been paid or is not
applicable.

     (c) With respect to any shares of Park Cities Common that are acquired as a
result of the exercise of the Stock Options, the purchase price for such shares
under the Stock Options shall be subtracted from or "netted-out" of the Merger
Consideration to be paid such shareholders.  That is, upon the exercise of the
Stock Options such shareholder shall not be required to pay Park Cities the
purchase price specified in the Stock Options, but such amount shall be deducted
from the amount of Merger Consideration that would otherwise have been paid to
such shareholder.

     (d) After the Effective Time, there shall be no further registration or
transfers on the records of Park Cities of outstanding certificates formerly
representing shares of Park Cities Common and, if a certificate formerly
representing such shares is presented to Park Cities or BOKF, it shall be
forwarded to the Paying Agent for cancellation and exchange for the Merger
Consideration.

     (e) All Merger Consideration paid upon the surrender of Park Cities Common
in accordance with the above terms and conditions shall be deemed to have been
paid in full satisfaction of all rights pertaining to such shares of Park Cities
Common.

                                      -4-
<PAGE>
 
     (f) In the event any certificate for Park Cities Common shall have been
lost, stolen or destroyed, the Paying Agent shall issue in exchange for such
lost, stolen or destroyed certificate, upon the making of an affidavit of that
fact by the holder thereof, such Merger Consideration as may be required
pursuant to this Agreement; provided, however, that BOKF may, in its discretion
and as a condition precedent to the issuance thereof, require the owner of such
lost, stolen or destroyed certificate to deliver a bond in such sum as it may
direct as indemnity against any claim that may be made against BOKF, Park
Cities, the Paying Agent or any other party with respect to the certificate
alleged to have been lost, stolen or destroyed.

     (g) At any time following six months after the Effective Time, BOKF shall
be entitled to terminate the Paying Agent relationship, and thereafter holders
of Certificates shall be entitled to look only to BOKF (subject to abandoned
property, escheat or other similar laws) with respect to the Merger
Consideration payable upon surrender of their Certificates.


                                  ARTICLE II

                 REPRESENTATIONS AND WARRANTIES OF PARK CITIES

     In order to induce BOKF and BOKSub to enter into, execute, deliver and
perform this Agreement, Park Cities represents and warrants to BOKF and BOKSub
as follows:

         Section 2.1.  Organization, Standing and Power.
         -----------   -------------------------------- 

     (a) Park Cities is a corporation duly organized, validly existing and in
good standing under laws of the State of Texas.  Park  Cities (i) has all
requisite power and authority to own, lease and operate its properties and to
carry on its business as it is now being conducted; (ii) is subject to the
supervision of the Board of Governors of the Federal Reserve System (the "Fed");
and (iii) is a bank holding company registered with the Fed under the BHCA.

     (b) PC Corporation is a corporation duly organized, validly existing and in
good standing under laws of the State of Nevada.  PC Corporation (i) has all
requisite power and authority to own, lease and operate its properties and to
carry on its business as it is now being conducted; (ii) is subject to the
supervision of the Fed; and (iii) is a bank holding company registered with the
Fed under the BHCA.

     (c) FNB is a national banking association duly organized, validly existing
and in good standing under laws of the United States.  FNB (i) has all requisite
power and authority to own, lease and operate its properties and to carry on its
business as it is now being conducted; (ii) is subject to the supervision of the
Federal Deposit Insurance Corporation ("FDIC") and the Office of Comptroller of
the Currency ("OCC"); and (iii) is an insured bank as defined in the Federal
Deposit Insurance Act.

     (d) Park Cities has delivered to BOKF and BOKSub complete and correct
copies, as of a date not more than 30 days prior to the date hereof, of (i) the
Articles of Association or Incorporation and all amendments thereto, and (ii)
the Bylaws and all amendments thereto, of each of Park Cities, PC Corporation
and FNB.

                                      -5-
<PAGE>
 
         Section 2.2.  Capital Structure.
         -----------   ----------------- 

     (a) The authorized capital stock of Park Cities consists of 2,000,000
shares of Common Stock, par value $5.00 per share and 2,000,000 shares of
preferred stock, par value $5.00 per share.  As of the date of this Agreement,
921,348 shares of Park Cities Common were outstanding and such issued and
outstanding shares of Park Cities Common are held of record by the shareholders
in the amounts specified for each such shareholder in Schedule 2.2(a).  Park
                                                      ---------------       
Cities does not have any outstanding shares of preferred stock nor any
commitment or obligation to repurchase, reacquire or redeem any of the
outstanding Park Cities Common.  As of the date of this Agreement, Park Cities
had outstanding stock options granted, pursuant to the Park Cities Stock Option
Plan, representing the right to acquire an aggregate of 271,686 shares of Park
Cities Common for an aggregate purchase price not less than $2,207,700 (the
"Stock Options"). The Park Cities Common is validly issued and outstanding,
fully paid and non-assessable.  Except for the Stock Options, there are no
outstanding subscriptions, conversion privileges, calls, warrants, options or
agreements obligating Park Cities to issue, sell, or dispose of any shares of
any of its capital stock.

     (b) The authorized capital stock of PC Corporation consists solely of 1,000
shares of Common Stock, par value $5.00 per share.  As of the date of this
Agreement, 1,000 shares of PC Corporation Common Stock were issued and
outstanding, and all of such outstanding shares are held of record by Park
Cities. There are no outstanding subscriptions, conversion privileges, calls,
warrants, options or agreements obligating PC Corporation to issue, sell, or
dispose of any shares of any of its capital stock.

     (c) The authorized capital stock of FNB consists of 2,000,000 shares of
Common Stock, par value $5.00 per share and 100,000 shares of preferred stock,
par value $50 per share.  As of the date of this Agreement, 550,039 shares of
FNB Common Stock were issued and outstanding of which 549,629 shares are held of
record by PC Corporation and 410 shares are held by other shareholders. There
are no outstanding shares of preferred stock, nor any subscriptions, conversion
privileges, calls, warrants, options or agreements obligating FNB to issue,
sell, or dispose of any shares of any of its capital stock.

         Section 2.3.  Authority.  Subject to the approval of this Agreement by
         -----------   ---------
the shareholders of Park Cities as contemplated by Section 5.6 hereof, the
                                                   -----------
execution and delivery of this Agreement and the consummation of the Merger
contemplated hereby have been duly and validly authorized by all necessary
corporate action on the part of Park Cities. Neither the execution and delivery
of this Agreement nor the consummation of the Merger contemplated hereby nor
compliance by Park Cities with any of the provisions hereof will (i) conflict
with or result in a breach of any provision of its Articles of Association or 
By-laws or constitute a default (or give rise to any right of termination,
cancellation or acceleration) under any of the terms, conditions or provisions
of any note, bond, mortgage, indenture, license, agreement or other instrument
or obligation to which Park Cities is a party, or by which it or any of its
properties or assets may be bound, except for such conflict, breach or default
as to which requisite waivers or consents either shall have been obtained by
Park Cities by the Effective Time (as hereinafter defined) of the Merger or the
obtaining of which shall have been waived by BOKF, or (ii) violate any order,
writ, injunction, decree, statute, rule or regulation applicable to Park Cities
or any of its properties or assets. No other consent or approval by any
governmental authority, other than compliance with applicable federal and state
securities and

                                      -6-
<PAGE>
 
banking laws and regulations of the Fed, is required in connection with the
execution and delivery by Park Cities of this Agreement or the consummation by
Park Cities of the Merger contemplated hereby.

         Section 2.4.  Financial Statements.
         -----------   -------------------- 

     (a) Park Cities has previously delivered or made available to BOKF complete
copies of the (i) audited consolidated balance sheets of Park Cities, PC
Corporation and FNB as of December 31, 1995 and related consolidated income
statements and statement of changes in shareholders' equity, together with the
notes thereto; (ii) unaudited consolidated balance sheet of Park Cities, PC
Corporation and FNB as of June 30, 1996 and the related unaudited consolidated
income statement for the six months then ended; and (iii) the year-end and
quarterly Reports of Condition and Report of Income of FNB for 1995 and June 30,
1996, as filed with the FDIC and OCC (collectively the "Financial Statements").

     (b) Information set forth in the Financial Statements present fairly the
financial position of Park Cities, PC Corporation and FNB as of the dates
thereof and the results of their operations and the changes in their financial
position for the periods indicated in conformity with generally accepted
accounting principles applied on a consistent basis, except the interim
statements are subject to normal year-end adjustments.  Such Financial
Statements do not, as of the dates thereof, include any material assets or omit
to state any material liabilities, absolute or contingent, or include or omit
other facts, the inclusion or omission of which renders such Financial
Statements, in light of the circumstances under which they were made, misleading
in any material respect; provided, however, the interim statements are subject
to normal year-end adjustments.

         Section 2.5.  Absence of Changes. Since June 30, 1996, except as
         -----------   ------------------
disclosed in Schedule 2.5, there has not been any material adverse change in the
             ------------
condition (financial or otherwise) of the assets, liabilities, earnings or
business of Park Cities, PC Corporation or FNB. Since such date, the business of
Park Cities, PC Corporation and FNB has been conducted only in the ordinary
course consistent with prior practices and such entities have not incurred any
additional material liabilities (not already reflected in the Financial
Statements) except: (i) those incurred in the ordinary course of business
            ------
consistent with past practices without negligence or willful malfeasance or,
(ii) expenses or liabilities incurred in connection with this Agreement and the
transactions contemplated hereby. Without limiting the generality of the
foregoing, since June 30, 1996, except as set forth in Schedule 2.5, none of
                                                       ------------ 
Park Cities, PC Corporation, or FNB have paid any dividends, made any
distributions of assets, made any material changes in compensation or benefits
of any employee (other than by reason of promotion to increased responsibility),
or entered into any contracts for services or materials except such contracts
                                                        ------
and materials which either: (i) may be terminated without penalty within 90 days
or, (ii) provide for the payment or other consideration to be furnished by Park
Cities, PC Corporation or FNB in an amount of not more than $100,000,
individually or $300,000 for all such contracts and materials.

         Section 2.6.  Tax Matters.
         -----------   ----------- 

     (a) Park Cities, PC Corporation and FNB have timely filed all federal,
state and local (and, if applicable, foreign) income, franchise, bank, excise,
real property, personal property

                                      -7-
<PAGE>
 
and other tax returns required by applicable laws to be filed by them
(including, without limitation, estimated tax returns, income tax returns,
information returns and withholding and employment tax returns) and have paid,
or where payment is not required to have been made, have set up an adequate
reserve or accrual for the payment of, all taxes required to be paid with
respect of the periods covered by such returns and, as of the Effective Time,
will have paid, or where payment is not required to have been made, will have
set up an adequate reserve or accrual for the payment of, all taxes for any
subsequent periods ending on or prior to the Effective Time.  None of Park
Cities, PC Corporation nor FNB will have any material liability for any such
taxes in excess of the amounts so paid or reserves or accruals so established.
No payment of any amount to any employee of any of Park Cities, PC Corporation,
or FNB is an excess parachute payment within the meaning of Section 280G of the
Internal Revenue Code.

     (b) All federal, state and local income, franchise, bank, excise, real
property, personal property and other tax returns filed by Park Cities, PC
Corporation and FNB are complete and accurate in all material respects.  None of
Park Cities, PC Corporation nor FNB is delinquent in the payment of any tax,
assessment or governmental charge, and none of them has requested any extension
of time within which to file any tax returns in respect of any fiscal year or
portion thereof which have not since been filed.  There are currently no
agreements in effect with respect to Park Cities, PC Corporation or FNB to
extend the period of limitations for the assessment or collection of any tax.
As of the date hereof, no audit, examination or deficiency or refund litigation
with respect to any such return is pending or, to the best of Park Cities's
knowledge, threatened.


         Section 2.7.  Options, Warrants and Related Matters. Except for the
         -----------   -------------------------------------
Stock Options, there are no options, warrants, calls, commitments or agreements
of any character to which Park Cities is a party or by which Park Cities is
bound, calling for the issuance of shares of Park Cities Common or any security
representing the right to purchase or otherwise receive any such Park Cities
Common. There are no options warrants, calls, commitments or agreements of any
character calling for the issuance of shares of any stock of PC Corporation or
FNB.

         Section 2.8.  Property.  Park Cities, PC Corporation and FNB own all
         -----------   --------                                              
property reflected on the balance sheet dated June 30, 1996 included in the
Financial Statements (except personal property sold or otherwise disposed of
since June 30, 1996, in the ordinary course of business), free and clear of all
mortgages, liens, pledges, charges or encumbrances of any nature whatsoever,
except those reflected in the Financial Statements, liens for current taxes not
yet due and payable and such encumbrances and imperfections of title, if any, as
are not substantial in character or amount or do not otherwise materially impair
business operations.


         Section 2.9.  Legal Proceedings.  There is no material legal,
         -----------   -----------------                              
administrative, arbitration or other proceeding or governmental investigation
pending or threatened which might reasonably be expected to result in material
money damages payable by Park Cities, PC Corporation or FNB in excess of
insurance coverage or in a permanent injunction against Park Cities, PC
Corporation or FNB.  To Park Cities' knowledge, each of Park Cities, PC
Corporation and FNB have complied with, and are not in default in any material
respect under, any laws, ordinances, requirements, regulations or orders
applicable to their business.  None of

                                      -8-
<PAGE>
 
Park Cities, PC Corporation nor FNB is a party to any agreement or instrument or
subject to any charter or other corporate restriction or any judgment, order,
writ, injunction, or decree, which materially and adversely affects, or might
reasonably be expected materially and adversely to affect, the business
operations, prospects, properties, assets or condition, financial or otherwise,
of Park Cities, PC Corporation or FNB.

         Section 2.10.  Brokers and Finders. None of Park Cities, its
         ------------   -------------------               
subsidiaries nor any of its officers, directors or employees has employed any
broker or finder or incurred any liability for any brokerage fees, commissions
or finders' fees in connection with the Merger contemplated herein, except for
Keefe, Bruyette & Woods, Inc. of New York, New York.

         Section 2.11.  Loan Portfolio. Except as disclosed in Schedule 2.11,
         ------------   --------------                         -------------
and except as to any breach which would not have a material adverse effect on
the consolidated financial position of Park Cities, PC Corporation and FNB, (i)
all loans and discounts shown on the Financial Statements at June 30, 1996 or
which were entered into after June 30, 1996, but before the Closing Date were
and will be made in all material respects for good, valuable and adequate
consideration in the ordinary course of FNB, in accordance in all material
respects with sound banking practices, and are not subject to any material known
defenses, setoffs or counterclaims, including without limitation any such as are
afforded by usury or truth in lending laws, except as may be provided by
bankruptcy, insolvency or similar laws or by general principles of equity; (ii)
the notes or other evidences of indebtedness evidencing such loans and all forms
of pledges, mortgages and other collateral documents and security agreements are
and will be, in all material respects, enforceable, valid, true and genuine and
what they purport to be; and (iii) Park Cities, PC Corporation and FNB have
complied and will prior to the Closing Date comply with all laws and regulations
relating to such loans, or to the extent there has not been such compliance,
such failure to comply will not materially interfere with the collection of any
such loan.

         Section 2.12.  Environmental. To Park Cities' knowledge, the ownership,
         ------------   -------------
location, construction, use and operation of all real property owned or leased
by Park Cities or FNB (fixed asset or OREO) is, and has at all times been, in
compliance with applicable Environmental Law, as hereinafter defined. PC
Corporation does not own or lease any real property and has not since its
incorporation, except for a lease of office space in the State of Nevada
providing for annual lease payments of approximately $4,500. To Park Cities'
knowledge, there are no pending or threatened, and there have been no
administrative, regulatory or judicial actions, suits, demands, demand letters,
claims, liens, notices of noncompliance or violation, investigations or
proceedings relating in any way to any Environmental Law relating to the real
property owned by Park Cities or FNB. To Park Cities' knowledge, (i) no real
property owned by Park Cities or FNB has at any time been used by Park Cities or
FNB, or by any person, as a landfill or for the storage or disposal, or as a
site of spilling, dumping, depositing or otherwise disposing of, any hazardous
or toxic substances or waste; and (ii) no real property owned by Park Cities or
FNB is, or has been, an industrial site or landfill. For the purposes hereof,
"Environmental Law" means any federal, state or local statute, law, rule,
regulation, ordinance, code, policy or rule of common law now in effect and in
each case as amended and any judicial or administrative interpretation thereof,
including any judicial or administrative order, consent, decree or judgment,
relating to the environment, health, safety or "hazardous materials," "hazardous
wastes," "toxic substances," "toxic pollutants," "contaminants," or words or
terms of similar import (including under any Environmental Law), including
without limitation the Comprehensive Environmental Response,

                                      -9-
<PAGE>
 
Compensation and Liability Act of 1980, as amended, 42 U.S.C. 9601 et seq., the
                                                                   -- ---      
Hazardous Materials Transportation Act, as amended, 49 U.S.C. 1801 et seq., the
                                                                   -- ---      
Resource Conservation and Recovery Act, as amended, 42 U.S.C. 6901 et seq., the
                                                                   -- ---      
Federal Water Pollution Control Act, as amended, 33 U.S.C. 1251 et seq., the
                                                                -- ---      
Toxic Substances Control Act, 15 U.S.C. 2601 et seq., the Clean Air Act, 42
                                             -- ---                        
U.S.C. 7401 et seq., the Safe Drinking Water Act, 42 U.S.C. 3808 et seq., the
            -- ---                                               -- ---      
Texas Solid Waste Disposal Act, Tex.  Health & Safety Code Ann. Ch. 361, the
Texas Clean Air Act, Tex. Health & Safety Code Ann. Ch. 382, the Texas Water
Code, Tex. Water Code Ann., and the Texas Hazardous Substances Spill Prevention
and Control Act, Tex. Water Code Ann.

         Section 2.13.  Zoning and Related Laws.  To Park Cities' knowledge, all
         ------------   -----------------------                                 
real property owned or leased by Park Cities or FNB and the use thereof complies
with all applicable laws, ordinances, regulations, orders or requirements,
including without limitation, building, zoning and other laws, except as to any
violations which would not have a material adverse affect on the financial
condition of  Park Cities or FNB.

         Section 2.14.  Compliance with Law. Park Cities, PC Corporation and FNB
         ------------   -------------------
have all licenses, franchises, permits and other governmental authorizations
that are legally required to enable them to conduct their respective businesses
in all material respects and are in compliance with all applicable laws and
regulations except to the extent that the failure to so comply could not have a
material adverse effect on Park Cities, PC Corporation or FNB.

         Section 2.15.  Agreements with Regulatory Agencies. None of Park
         ------------   -----------------------------------
Cities, PC Corporation nor FNB is subject to any cease-and-desist or other order
issued by, or a party to any written agreement or memorandum of understanding
with or is a party to any commitment letter or similar undertaking to, or is
subject to any order or directive, or is a recipient of any extraordinary
supervisory letter from, or has adopted any board resolutions at the request of
(each a "Regulatory Agreement") any regulatory agency that materially restricts
the conduct of its business or that in any manner relates to its capital
adequacy, its credit policies, its management or its business, nor have Park
Cities, PC Corporation or FNB been advised by any regulatory agency that it is
considering issuing or requesting any Regulatory Agreement.

         Section 2.16.  Regulatory Approvals. Park Cities has no reason to
         ------------   --------------------
believe that it will not be able to obtain all requisite regulatory approvals
necessary to consummate the Merger as set forth in this Agreement.

         Section 2.17.  Dividends.  Park Cities has not declared or paid any
         ------------   ---------                                           
dividends during the period from July 1, 1996 to the date hereof.

         Section 2.18.  Employees. Except as set forth in Schedule 2.18 attached
         ------------   ---------                         -------------
hereto, (i) none of the employees of Park Cities, PC Corporation, or FNB is
employed under any employment contract (oral or written) which will survive the
Merger and (ii) none of Park Cities, PC Corporation, or FNB have any employee
benefit plans.

         Section 2.19.  Contracts and Commitments. A list of all contracts and
         ------------   -------------------------                             
commitments, other than deposit, safe deposit, credit and lending transactions
entered into in the ordinary course of FNB's banking business, which are
material to the business, operations, or financial condition of Park Cities, PC
Corporation, or FNB as of this date is set forth in

                                     -10-
<PAGE>
 
Schedule 2.19.  For the purpose of Schedule 2.19, materiality shall mean those
- -------------                      -------------                              
contracts and commitments for which payment or other consideration to be
furnished by Park Cities, PC Corporation, or FNB is more than $100,000. Park
Cities, PC Corporation, and FNB have performed in all material respects and are
performing all material contractual and other obligations required to be
performed by them.


                                  ARTICLE III

                    REPRESENTATIONS AND WARRANTIES OF BOKF

     In order to induce Park Cities to enter into, execute, deliver and perform
this Agreement, BOKF represents and warrants to Park Cities as follows:

         Section 3.1.  Organization, Standing and Power. BOKF is a corporation
         -----------   --------------------------------
duly organized, validly existing and in good standing under the State of
Oklahoma. BOKF (i) has all requisite power and authority to execute and deliver
this Agreement and to perform its obligations hereunder, and to own, lease and
operate its properties and to carry on its business as now being conducted; and
(ii) is a bank holding company registered with the Fed under the BHCA.

         Section 3.2.  Authority. The execution and delivery of this Agreement,
         -----------   ---------
the consummation of the Merger and payment of the Merger Consideration
(including issuance and delivery of the BOKF Notes) and the other transactions
contemplated hereby have been duly and validly authorized by all necessary
corporate action on the part of BOKF. Neither the execution and delivery of this
Agreement nor the consummation of the Merger and payment of the Merger
Consideration (including issuance and delivery of the BOKF Notes) and the other
transactions contemplated hereby nor compliance by BOKF with any of the
provisions hereof will (i) conflict with or result in a breach of any provision
of its Articles of Association or Bylaws or constitute a default (or give rise
to any right of termination, cancellation or acceleration) under any of the
terms, conditions or provisions of any note, bond, mortgage, indenture, license,
agreement or other instrument or obligation to which BOKF is a party, or by
which it or any of its properties or assets may be bound except for such
conflict, breach or default as to which requisite waivers or consents either
shall have been obtained by BOKF by the Effective Time, as hereinafter defined,
or the obtaining of which shall have been waived by Park Cities, or (ii) violate
any order, writ, injunction, decree, statute, rule or regulation applicable to
BOKF or any of its properties or assets. No consent or approval by any
governmental authority, other than compliance with applicable federal and state
securities and banking laws and regulations of the Fed, is required in
connection with the execution and delivery by BOKF of this Agreement or the
consummation by BOKF of the Merger and payment of the Merger Consideration
(including issuance and delivery of the BOKF Notes) and the other transactions
contemplated hereby.


         Section 3.3.  Subsidiaries.  Each of BOKF's subsidiaries  is duly
         -----------   ------------                                       
organized, validly existing and in good standing under the laws of the
jurisdiction of its incorporation and has the corporate power to own its
respective properties and assets, to incur its respective liabilities and to
carry on its respective business as now being conducted.


                                     -11-
<PAGE>
 
         Section 3.4.  Financial Information. The consolidated balance sheets of
         -----------   ---------------------
BOKF and its subsidiaries as of December 31, 1995 and related consolidated
statements of income, changes in stockholders' equity and cash flows for the
three years ended December 31, 1995, together with the notes thereto, included
in BOKF's 10-K for the year ended 1995, as currently on file with the Securities
and Exchange Commission ("SEC") and the unaudited consolidated balance sheet of
BOKF and its subsidiaries as of June 30, 1996 and the related unaudited
consolidated income statement and statements of changes in shareholders' equity
and cash flows for the six months then ended included in BOKF's Quarterly
Reports on Form 10-Q for the quarters then ended, as currently on file with the
SEC (together the "BOKF Financial Statements"), have been prepared in accordance
with generally accepted accounting principles applied on a consistent basis
(except as disclosed therein) and fairly present the consolidated financial
position and the consolidated results of operations, changes in stockholders'
equity and cash flows of BOKF and its consolidated subsidiaries as of the dates
and for the periods indicated (subject, in the case of interim financial
statements, to normal recurring year-end adjustments, none of which will be
material).

         Section 3.5.  Absence of Changes. Since December 31, 1995, there has
         -----------   ------------------
not been any material adverse change in the financial condition, the results of
operations or the business of BOKF and its subsidiaries taken as a whole, nor
have there been any events or transactions having such a material adverse effect
which should be disclosed in order to make the BOKF Financial Statements not
misleading. Notwithstanding the foregoing, any changes in banking laws,
generally accepted accounting principles, prevailing interest rates or other
developments which affect the entire banking industry generally shall not be
deemed to be a material adverse change in the financial condition, the results
of operations or the business of BOKF and its subsidiaries taken as a whole.

         Section 3.6.  Litigation.  There is no litigation, claim or other
         -----------   ----------                                         
proceeding pending or, to the knowledge of BOKF, threatened, against BOKF or any
of its subsidiaries, of which the property of BOKF or any of its subsidiaries is
or would be subject which if adversely determined would have a material adverse
effect on the business of BOKF and its subsidiaries taken as a whole.

         Section 3.7.  Reports. Since January 1, 1993 (in the case of
         -----------   -------
subsidiaries of BOKF, the date of acquisition thereof by BOKF, if later) BOKF
and each of its significant subsidiaries has filed all reports and statements,
together with any amendments required to be made with respect thereto, that it
was required to file with (i) the SEC, (ii) the Fed, (iii) the OCC, (iv) the
FDIC, (v) any applicably state securities or banking authorities, (vi) NASDAQ
and (vii) any other governmental authority with jurisdiction over BOKF or any of
its significant subsidiaries. As of their respective dates, each of such reports
and documents, as amended, including the financial statements, exhibits and
schedules thereto, complied in all material respects with the relevant statutes,
rules and regulations enforced or promulgated by the regulatory authority with
which they were filed, and did not contain any untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances
under which they were made, not misleading.

         Section 3.8.  Compliance With Law. BOKF and its significant
         -----------   -------------------
subsidiaries have all licenses, franchises, permits and other governmental
authorizations that are legally required

                                     -12-
<PAGE>
 
to enable them to conduct their respective businesses in all material respects
and are in compliance with all applicable laws and regulations, except to the
extent that the failure to so comply would not have a material adverse effect on
BOKF and its subsidiaries taken as a whole.

         Section 3.9.  Regulatory Approvals. BOKF has no reason to believe that
         -----------   --------------------
it will not be able to obtain all requisite regulatory approvals necessary to
consummate the Merger as set forth in this Agreement.

         Section 3.10.  BOKF Notes.  The BOKF Notes when issued and delivered
         ------------   ----------                                           
pursuant to the terms of this Agreement, will constitute the valid and binding
obligations of BOKF enforceable in accordance with their terms, except as
enforcement may be limited by applicable bankruptcy, reorganization, insolvency,
moratorium, or similar laws affecting the enforcement of creditors' rights.

         Section 3.11.  Statements True and Correct.  None of the information
         ------------   ---------------------------                          
supplied or to be supplied by BOKF or BOKSub for inclusion in (i) the
Registration Statement (as defined in Section 5.3), (ii) the Proxy
                                      -----------                 
Statement/Prospectus (as defined in Section 5.6), and (iii) any other documents
                                    -----------                                
to be filed with the SEC or any banking or other regulatory authority in
connection with the transactions contemplated hereby, will, at the respective
times such documents are filed, and with respect to the Proxy
Statement/Prospectus, when first mailed to the shareholders of Park Cities and
at the time of the Stockholders' Meeting (as defined in Section 5.6), contain
                                                        -----------          
any untrue statement of a material fact, or omit to state any material fact
necessary in order to make the statements made therein, in light of the
circumstances under which they are made, not misleading.  All documents that
BOKF is responsible for filing with the SEC or any other regulatory authority in
connection with the transaction contemplated hereby will comply as to form in
all material respects with the provisions of applicable law and any rules and
regulations thereunder.

                                  ARTICLE IV

                   REPRESENTATIONS AND WARRANTIES OF BOKSUB

     In order to induce Park Cities to enter into, execute, deliver and perform
this Agreement, BOKSub represents and warrants to Park Cities as follows:

         Section 4.1.  Organization, Standing and Power. BOKSub is a corporation
         -----------   --------------------------------
duly organized, validly existing and in good standing under the laws of the
State of Texas, with all requisite power and authority to own, lease and operate
its properties and to carry on its business as now being conducted.

         Section 4.2. Authority. The execution and delivery of this Agreement
         -----------  ---------
and the consummation of the Merger contemplated hereby have been duly and
validly authorized by all necessary corporate action on the part of BOKSub.
Neither the execution and delivery of this Agreement, the consummation of the
Merger contemplated hereby nor the compliance by BOKSub with any of the
provisions hereof will (i) conflict with or result in a breach of any provision
of its Articles of Association or Bylaws or constitute a default (or give rise
to any right of termination, cancellation or acceleration) under any of the
terms, conditions or provisions of any note, bond, mortgage, indenture, license,
agreement or other instrument or obligation to

                                     -13-
<PAGE>
 
which BOKSub is a party, or by which it or any of its properties or assets may
be bound except for such conflict, breach or default as to which requisite
waivers or consents either shall have been obtained by BOKSub by the Effective
Time, as hereinafter defined, or the obtaining of which shall have been waived
by BOKSub, or (ii) violate any order, writ, injunction, decree, statute, rule or
regulation applicable to BOKSub or any of its properties or assets.  No consent
or approval by any governmental authority, other than those required by
applicable federal and state securities and banking laws and regulations is
required in connection with the execution and delivery by BOKSub of this
Agreement.


                                   ARTICLE V

                             PRE-CLOSING COVENANTS

         Section 5.1.  Access to Records and Properties of Park Cities.
         -----------   ----------------------------------------------- 

     (a) Between the date of this Agreement and the Effective Time, Park Cities
agrees to give BOKF reasonable access to all of its and FNB's premises, books,
records (including tax returns filed and those in preparation), financial
information and other information pertinent to its operations, including,
without limitation, access to independent auditors with respect to the
preparation of the financial statements and tax planning of Park Cities and FNB;
provided, however, that any such investigation shall be conducted in such manner
as not to interfere unreasonably with the operation of the business of Park
Cities or FNB.  Park Cities will cooperate fully in permitting BOKF to make a
full investigation of the business, properties, financial condition and
investments of Park Cities and FNB, in the preparation of all applications,
reports and other documents necessary or advisable for the successful
consummation of the Merger.

     (b) BOKF will treat and hold confidential any information concerning the
business and affairs of Park Cities, PC Corporation or FNB that is not generally
available to the public ("Confidential Information") it receives from any of
Park Cities, PC Corporation, FNB, or their respective shareholders, officers,
directors or agents, in the course of its review of Park Cities, PC Corporation
or FNB.  BOKF will not use any of the Confidential Information except in
connection with this Agreement.  If this Agreement is terminated for any reason
whatsoever, BOKF and BOKSub will promptly return to Park Cities, PC Corporation
or FNB, as the case may be, all tangible embodiments (and all copies) of the
Confidential Information which are in its possession, and will not at any time
use any Confidential Information for any business purpose or disclose it to any
third party.  Any information provided to BOKF by Park Cities, PC Corporation or
FNB shall not be deemed to be Confidential Information if:  (i)  it was in
BOKF's lawful possession or within BOKF's knowledge at the time of disclosure;
(ii)  at the time of disclosure, it was in the public domain; (iii)  after Park
Cities' disclosure, it becomes, through no act or omission on BOKF's part, in
the public domain; or (iv)  it was lawfully and independently obtained by BOKF
from a third party who was not under an obligation of confidentiality.

                                     -14-
<PAGE>
 
         Section 5.2.  Operation of the Business of Park Cities.
         -----------   ---------------------------------------- 

     (a) Park Cities agrees that from the date hereof to the Effective Time,
except to the extent that BOKF shall otherwise consent, Park Cities will operate
its business substantially as presently operated and only in the ordinary
course, and, consistent with such operation, it will use its reasonable best
efforts to preserve intact its present business organization and its
relationships with persons having business dealings with it.

     (b) Park Cities will maintain and keep its properties in as good repair and
condition as at present, except for depreciation due to ordinary wear and tear
and damage due to casualty, maintain in full force and effect insurance
comparable in amount and scope of coverage to that now maintained, perform all
its obligations under contracts, leases and documents relating to or affecting
its assets, properties and business, and fully comply with and perform all
obligations and duties imposed upon it by all applicable laws and governmental
rules, regulations and orders imposed by governmental authorities.

     (c) Without limiting the generality of the foregoing, Park Cities agrees
that it will not from the date hereof to the Effective Time, except to the
extent BOKF should otherwise consent, other than in the ordinary course of
business and consistent with Park Cities' or FNB's prior practices, (i) grant
any material salary increase to any officer or employee or enter into any new
bonus, incentive compensation, deferred compensation, profit sharing,
retirement, pension, group insurance or other benefit plan or any new employment
or consulting agreement; (ii) create or otherwise become liable with respect to
any indebtedness for money borrowed or purchase money indebtedness; (iii) make
or allow any amendment of its Articles of Association or Bylaws; (iv) issue or
contract to issue any shares of Park Cities Common or securities exchangeable
for or convertible into Park Cities Common, except in connection with the
exercise of the Stock Options; (v) purchase any shares of Park Cities Common;
(vi) enter into or assume any material contract or obligation; (vii) incur or
suffer to exist a lien on any of its properties either real or personal; (viii)
make any substantial renovation of any of its properties or enter into any lease
or agreement involving any substantial obligation; or (ix) waive any right of
substantial value.

     (d) Notwithstanding anything in this Agreement to the contrary, (i) the
Stock Options may be exercised and Park Cities may issue Park Cities Common in
connection therewith and otherwise perform its obligations thereunder; (ii) the
Stock Option exercise dates may be extended in the discretion of Park Cities
subject to the provisions of this Agreement respecting the exercise of such
Stock Options in connection with the consummation of the Merger; and (iii) upon
the exercise of the Stock Options, Park Cities may make bonus payments, in an
aggregate amount not exceeding $1,763,700, to its employees exercising Stock
Options in order to cover certain anticipated tax liabilities arising from the
exercise thereof.

         Section 5.3.  Regulatory Approvals and Cooperation.
         -----------   ------------------------------------ 

     (a) BOKF and BOKSub shall promptly, but in no event later than twenty (20)
days after the date of this Agreement, file or cause to be filed applications to
fulfill all governmental, regulatory and other requirements (including, without
limitation, obtaining the approval of the OCC, the FDIC, the Fed, SEC and/or any
other governmental entity having jurisdiction over Park Cities, PC Corporation,
FNB or BOKF and pay all fees and expenses associated therewith)

                                     -15-
<PAGE>
 
required by BOKF or BOKSub for the completion of the transaction contemplated by
this Agreement; and promptly furnish Park Cities with copies of all such
regulatory filings.

     (b) Without limiting the generality of Section 5.3(a) above, BOKF shall
file with the SEC a registration statement, on Form S-4 or any other available
form, (the "Registration Statement") relating to the BOKF Notes to be offered to
the Park Cities shareholders pursuant to this Agreement and, unless an exemption
is available, file the Indenture with the SEC in accordance with the Trust
Indenture Act.  BOKF shall use its best efforts to cause the Registration
Statement to become effective and, unless exempt, have the Indenture qualified
under the Trust Indenture Act.  BOKF shall timely file all documents required to
obtain all necessary Blue Sky permits and approvals, if any, required to carry
out the transactions contemplated by this Agreement, shall pay all expenses
incident thereto and shall use its best efforts to obtain such permits and
approvals on a timely basis.

     (c) Park Cities shall take all action necessary and fully cooperate in good
faith with BOKF and BOKSub to bring about the Merger contemplated by this
Agreement as soon as practicable.  Park Cities will give any notices to third
parties, and Park Cities will use its best efforts to obtain any third party
consents, that BOKF may reasonably request in connection with the consummation
of the Merger.

         Section 5.4.  Dividends.  Park Cities agrees that it will not pay any
         -----------   ---------                                              
dividends, stock or cash, to its shareholders from the date hereof through the
Effective Time, except the payments made in connection with the exercise of the
Stock Options as set forth in Section 5.2(d) above.
                              --------------       

         Section 5.5. Public Disclosure. None of BOKF, BOKSub, Park Cities, nor
         -----------  -----------------
any representative of said parties, will make any public disclosure concerning
this Agreement or the Merger contemplated herein without the mutual consent of
each of the other parties hereto to the timing and content of the disclosure;
provided, however, the parties hereto may make any disclosure necessary to
maintain compliance with applicable federal or state laws or regulations or
required in connection with the making of any application necessary to effect
the Merger.

         Section 5.6.  Shareholder Approval.  Park Cities shall cause to be duly
         -----------   --------------------                                     
called and held, on a date mutually selected by BOKF and Park Cities, a special
meeting of its shareholders (the "Stockholders' Meeting") for (i) submission of
this Agreement and the Merger for approval of such shareholders as required by
the Corporate Law, and, if necessary, (ii) submission for shareholder approval
of any and all payments which would, but for shareholder approval in accordance
with the shareholder approval requirements of Section 280G of the Internal
Revenue Code, be deemed an excess parachute payment within the meaning of said
Section 280G ("Compensation Payments"). Park Cities shall cooperate and assist
BOKF in preparing and filing a Proxy Statement/Prospectus (the "Proxy
Statement/Prospectus") with the SEC. Park Cities shall (i) furnish BOKF all
information concerning itself that BOKF may reasonably request in connection
with such Proxy Statement/Prospectus and (ii) mail the Proxy
Statement/Prospectus to its shareholders.  Park Cities shall take such other
action as is reasonably necessary to obtain approval of the Agreement, the
Merger, and, if necessary, any Compensation Payments from its shareholders.
Prior to mailing the Proxy Statement/Prospectus, the Board of Directors of Park
Cities shall hold a Board of Directors meeting and shall recommend approval of
the Agreement, the Merger, and, if necessary, any Compensation Payments to the
shareholders of

                                     -16-
<PAGE>
 
Park Cities; unless BOKF shall have materially breached any material
representation, warranty or covenant set forth in this Agreement.

         Section 5.7. No Solicitation. Prior to the Effective Time of the
         -----------  ---------------
Merger, unless this Agreement is sooner terminated, Park Cities shall not
directly or indirectly (i) solicit or encourage inquiries or proposals with
respect to the Merger of Park Cities or the sale of any of the shares of Park
Cities Common or other material asset(s) of Park Cities from any party other
than BOKF, or (ii) merge with any party or sell any of the shares of Park Cities
Common or material asset(s) of Park Cities to any party except as set forth in
this Agreement.


                                  ARTICLE VI

                    CONDITIONS OF MERGER - BOKF AND BOKSUB

     The obligations of BOKF and BOKSub to close the transactions contemplated
by this Agreement are subject to the satisfaction of the following conditions,
unless waived by BOKF and BOKSub.

         Section 6.1.  Representations and Warranties.  The representations and
         -----------   ------------------------------                          
warranties of Park Cities set forth in Article II hereof shall be true and
correct in all material respects as of the date of this Agreement and as of the
Closing Date as though made on and as of the Closing Date, except as otherwise
permitted by this Agreement, and BOKF shall have received a certificate,
executed by the President of Park Cities to that effect.

         Section 6.2. Performance of Obligations of Park Cities. Park Cities
         -----------  -----------------------------------------
shall have performed all obligations and agreements required to be performed by
it under this Agreement prior to the Closing Date.

         Section 6.3. Authorization of Merger. All action necessary to authorize
         -----------  -----------------------
the execution, delivery and performance of this Agreement by Park Cities and the
consummation of the transactions contemplated hereby shall have been duly and
validly taken by the Boards of Directors of Park Cities and BOKSub and Park
Cities shall have full power and right to merge on the terms provided herein.
All action necessary to authorize and consummate the Merger contemplated hereby
shall have been duly and validly taken by the shareholders of Park Cities and
holders of not more than twenty percent (20%) of the Park Cities Common either
(i) file with Park Cities prior to the Stockholders' Meeting a notice of their
intent to exercise their right to dissent to the Merger or (ii) vote against the
Merger at the Stockholders' Meeting. In the event the Compensation Payments are
submitted for approval of the Park Cities shareholders in accordance with
Section 5.6, holders of at least seventy-five percent of Park Cities Common vote
- -----------                                                                     
to approve the Compensation Payments in accordance with Section 280G of the
Internal Revenue Code.


                                     -17-
<PAGE>
 
                                  ARTICLE VII

                      CONDITIONS OF MERGER - PARK CITIES

     The obligation of Park Cities to close the transactions contemplated by
this Agreement is subject to the satisfaction of the following conditions,
unless waived by Park Cities:

         Section 7.1.  Representations and Warranties.  The representations and
         -----------   ------------------------------                          
warranties of BOKF and BOKSub set forth in Article III and Article IV hereof,
respectively, shall be true and correct in all material respects as of the date
of this Agreement and as of the Closing Date as though made on and as of the
Closing Date, except as otherwise permitted by this Agreement, and Park Cities
shall have received a certificate, executed by the Presidents of BOKF and BOKSub
to that effect.

         Section 7.2. Performance of Obligations of BOKF. BOKF and BOKSub shall
         -----------  ----------------------------------                        
have performed all obligations and agreements required to be performed by it
under this Agreement prior to the Closing Date.

         Section 7.3.  Authorization of Merger by BOKF and BOKSub.  All action
         -----------   ------------------------------------------             
necessary to authorize the execution, delivery and performance of this Agreement
by BOKF and BOKSub and the consummation of the Merger contemplated hereby shall
have been duly and validly taken by the Boards of Directors and shareholders of
BOKF and BOKSub, respectively, and BOKSub and Park Cities shall have full power
and right to merge on the terms provided herein.

         Section 7.4. Authorization of Merger by Park Cities. All action
         -----------  --------------------------------------
necessary to authorize and consummate the Merger contemplated hereby shall have
been duly and validly taken by the shareholders of Park Cities and holders of
not more than one-third of the Park Cities Common either (i) file with Park
Cities prior to the Stockholders Meeting a notice of their intent to exercise
their right to dissent to the Merger or (ii) vote against the Merger at the
Stockholders' Meeting.


                                 ARTICLE VIII

         CONDITIONS TO RESPECTIVE OBLIGATIONS OF BOKF AND PARK CITIES

     The respective obligations of BOKF and Park Cities under this Agreement
are, at their respective options, subject to the further condition that:

         Section 8.1.  Governmental Approvals.  The parties hereto shall have
         -----------   ----------------------                                
received approval of the Merger and issuance of the BOKF Notes as contemplated
by this Agreement from all necessary governmental agencies and authorities,
including the Fed, the OCC, the FDIC and the SEC, and such approvals shall not
have been contested by any Federal or state governmental authority nor by any
other third party by formal proceeding, and none of such approvals or consents
shall be subject to any terms or conditions that are unreasonable or unduly
burdensome in the opinion of the party hereto which is obliged to discharge or
comply with such term or condition, and all applicable regulatory waiting
periods have expired.  It is understood

                                     -18-
<PAGE>
 
that if any contest as aforesaid is brought by formal proceedings, BOKF may, but
shall not be obligated to, answer and defend such contest.

         Section 8.2.  Documents.  Each party hereto shall have received all
         -----------   ---------                                            
documents required to be received from the other party on or prior to the
Closing Date, including those set forth in Section 9.3 hereof, all in form and
                                           -----------                        
substance reasonably satisfactory to the receiving party.


                                  ARTICLE IX

                                    CLOSING

         Section 9.1. Closing. The closing ("Closing") for the consummation of
         -----------  -------
the transactions contemplated by this Agreement shall take place at the offices
of Jackson & Walker, L.L.P., 901 Main Street, Dallas, Texas at 10:00 a.m.
Central Time on the Closing Date described in Section 9.2, unless another date
                                              -----------
or place is agreed to in writing by the parties hereto.

         Section 9.2. Closing Date; Effective Time. The Closing shall take place
         -----------  ----------------------------
on the first business day of the month following the month during which each of
the conditions in Articles VI, VII, and VIII is satisfied or waived by the
appropriate party or on such later date as may be prescribed by any Federal or
state agency or authority pursuant to an applicable Federal or state law, rule
or regulation, prior to which date consummation of the transactions provided
herein may not be effected (the "Closing Date"). Subject to the terms and
conditions set forth herein, including receipt of all regulatory approvals, the
Merger shall be effective upon the issuance of a Certificate of Merger by the
Secretary of State of the State of Texas (the "Effective Time"), which the
parties shall use their best efforts to cause to occur on the Closing Date.

         Section 9.3.  Closing Deliveries.
         -----------   ------------------ 

     (a) At the Closing, Park Cities shall deliver to BOKF and BOKSub:

         (i)    a certified copy of the Articles of Incorporation or Association
of Park Cities, PC Corporation and FNB;

         (ii)   a Certificate signed by an appropriate officer of Park Cities
stating that (A) each of the representations and warranties contained in Article
II is true and correct in all material respects at the time of the Closing with
the same force and effect as if such representations and warranties had been
made at Closing, and (B) all of the conditions set forth in Article VII have
been satisfied or waived as provided therein;

         (iii)  a certified copy of the resolutions of Park Cities' Board of
Directors and shareholders, as required for valid approval of the execution of
this Agreement and the consummation of the Merger and the other transactions
contemplated hereby;

                                     -19-
<PAGE>
 
         (iv)   Certificate of the Texas Secretary of State, dated a recent
date, stating that Park Cities is in good standing; and

         (v)    executed Employment Agreements for Tom E. Turner, C. Thomas
Abbott and Charles A. Angel, Jr., in substantially the form as attached hereto
as Exhibit "B", Exhibit "C", and Exhibit "D", respectively.
   -----------  -----------      -----------

         (vi)   a legal opinion from counsel for Park Cities in substantially
the form attached hereto as Exhibit "E".
                            ----------- 
         (vii)  an opinion of the accounting firm of Coopers & Lybrand, or
another national accounting firm mutually agreed to by Park Cities and BOKF, in
a form reasonably acceptable to BOKF, opining that no payment, of which such
accounting firm has knowledge, to any employee of Park Cities, PC Corporation or
FNB is an excess parachute payment within the meaning of Section 280G of the
Internal Revenue Code.

     (b) At the Closing, BOKF shall deliver to Park Cities:

         (i)    A Certificate signed by an appropriate officer of BOKF and
BOKSub stating that (A) each of the representations and warranties contained in
Article III and IV is true and correct in all material respects at the time of
the closing with the same force and effect as if such representations and
warranties have been made at Closing and (B) all of the conditions set forth in
Article VI have been satisfied;

         (ii)   a certified copy of the resolutions of BOKF's Board of Directors
authorizing the execution of this Agreement and the consummation of the
transactions contemplated hereby;

         (iii)  a certified copy of the resolutions of BOKSub's Board of
Directors and shareholder, as required for valid approval of the execution of
this Agreement and the consummation of the transactions contemplated hereby; and

         (iv)   a legal opinion from counsel for BOKF in substantially the form
attached hereto as Exhibit "F".
                   ----------- 


                                   ARTICLE X

                                  TERMINATION

         Section 10.1.  Park Cities Damages.  In the event this Agreement
         ------------   -------------------                              
terminates: (i) pursuant to Section 10.3 (c) (d) or (e) below (except any
                            ---------------------------                  
termination under Section 10.3(c) arising from the failure of the condition in
                  ---------------                                             
Section 7.4), or (ii) pursuant to Section 10.3(f) below through the fault of, or
- -----------                       ---------------                               
reason attributable to, BOKF, BOKF agrees to promptly pay to Park Cities (or FNB
at the discretion of Park Cities) the amount of $2,000,000 ("PC Termination
Damages") as an agreed upon reasonable amount to compensate Park Cities for
damages, and not as a penalty, arising from or in connection with such
termination and failure to consummate the Merger.


                                     -20-
<PAGE>
 
         Section 10.2.  BOKF Damages.  In the event this Agreement terminates
         ------------   ------------                                         
pursuant to Section 10.3 (b) below, (except any termination arising from the
            ----------------                                                
failure of the condition in Section 6.3), Park Cities agrees to promptly pay to
                            -----------                                        
BOKF the amount of $500,000 ("BOKF Termination Damages") as an agreed upon
reasonable amount to compensate BOKF for damages, and not as a penalty, arising
from or in connection with such termination and failure to consummate the
Merger.

         Section 10.3. Termination. This Agreement may be terminated at any time
         ------------  -----------
prior to the Effective Time:

     (a) The mutual consent of the respective Boards of Directors of BOKF and
Park Cities;

     (b) BOKF if the conditions set forth in Article VI hereof shall not have
                                             ----------                      
been met;

     (c) Park Cities if the conditions set forth in Article VII hereof shall not
                                                    -----------                 
have been met;

     (d) BOKF if the conditions set forth in Article VIII hereof shall not have
                                             ------------                      
been met through no fault of, or reason attributable to, BOKF;

     (e) Park Cities if the conditions set forth in Article VIII hereof shall
                                                    ------------             
not have been met through no fault of, or reason attributable to, Park Cities,
PC Corporation, or FNB; or

     (f)  Park Cities in the event the Closing has not occurred by June 30,
1997, or such other date as the parties hereto agree in writing.
 
          Any party desiring to terminate this Agreement pursuant to any of the
foregoing provisions shall give notice of such termination to the other party in
accordance with Section 12.2 hereof.
                ------------        

         Section 10.4. Effect of Termination. In the event of the termination
         ------------  ---------------------
and abandonment of this Agreement and the Merger, pursuant to Section 10.3, this
                                                              ------------
Agreement shall become void and have no effect, except for payment by BOKF of
the PC Termination Damages pursuant to the terms of Section 10.1 above or
                                                    ------------
payment by Park Cities of the BOKF Termination Damages pursuant to the terms of
Section 10.2 above, and except for breaches or actions occurring prior to
- ------------------                                                       
termination; provided, however, that the confidentiality provisions of Section
                                                                       -------
5.1, above, shall survive termination.  Subject to Section 10.1 and Section
- ---                                                ------------     -------
10.2, any such termination which occurs through no fault of any of the parties
- ----
to this Agreement shall be without liability to any of the parties hereto,
except that if such termination shall result from the willful failure of a party
to fulfill a condition to the performance of the obligation of the other party
to this Agreement, such party shall be fully liable for any and all damages,
costs and expenses (including reasonable attorney's fees) sustained or incurred
by the other party or parties as a result of such failure or breach.

     Section 10.5.  Waiver and Amendment.  Any term or provision of this
     ------------   --------------------                                
Agreement, except statutory requirements and requisite approvals of regulatory
authorities, may be waived at any time by the party which is entitled to the
benefits thereof and this Agreement may be

                                     -21-
<PAGE>
 
amended or supplemented at any time by the mutual agreement of BOKF, BOKSub and
Park Cities through action taken by their respective Boards of Directors.


                                  ARTICLE XI

                             ADDITIONAL COVENANTS

         Section 11.1.  No Survival.  None of the representations, covenants,
         ------------   -----------                                          
warranties and agreements contained in this Agreement shall survive the Closing
and the Effective Time; provided, however, this Agreement shall continue and
remain in full force and effect regarding the covenants of BOKF that by their
terms are to be performed after the Effective Time (including without limitation
the provisions in Section 1.5 concerning payment of the Merger Consideration and
                  -----------                                                   
the provisions in Section 11.3 concerning indemnification and insurance) for the
                  ------------                                                  
period of the applicable statute of limitations.

         Section 11.2.  Indemnification; Insurance.
         ------------   -------------------------- 

     (a) From and after the Effective Time the BOKF (the "Indemnifying Party")
shall indemnify and hold harmless each present and former director, officer and
employee of Park Cities and FNB determined as of the Effective Time (the
"Indemnified Parties") against any costs or expenses (including reasonably
attorneys' fees), judgments, fines, losses, claims, damages or liabilities
(collectively, "Costs") incurred in connection with any claim, action, suit,
proceeding or investigation, whether civil or criminal, administrative or
investigative, arising out of matters existing or occurring at or prior to the
Effective Time, whether asserted or claimed prior to, at or after the Effective
Time to the fullest extent to which such Indemnified Parties were entitled under
the Articles of Agreement, Certificate of Incorporation and Bylaws of Park
Cities, PC Corporation and FNB.

     (b) Any Indemnified Party wishing to claim indemnification under this
section, upon learning of any such claim, action, suit, proceeding or
investigation, shall promptly notify the Indemnifying Party, but the failure to
so notify shall not relieve the indemnifying Party of any liability it may have
to such Indemnified Party if such failure does not materially prejudice the
Indemnifying Party.  In the event of any such claim, action, suit, proceeding or
investigation (whether arising before or after the Effective Time), (i) the
Indemnifying Party shall have the right to assume the defense thereof and the
Indemnifying Party shall not be liable to such Indemnified Parties for any legal
expenses of other counsel or any other expenses subsequently incurred by such
Indemnified Parties in connection with the defense thereof, except that if the
Indemnifying Party elects not to assume such defense or counsel for the
Indemnified Party and the Indemnified Parties, the Indemnified Parties may
retain counsel which is reasonably satisfactory to the Indemnifying Party, and
the Indemnifying Party shall pay, promptly as statements therefor are received,
the reasonable fees and expenses of such counsel for the Indemnified Parties
(which may not exceed one firm in any jurisdiction unless the use of one counsel
for such Indemnified Parties would present such counsel with a conflict of
interest), (ii) the Indemnified Parties will cooperate in the defense of any
such matter and (iii) the Indemnifying Party shall not be liable for any
settlement effected without its prior written consent.

                                     -22-
<PAGE>
 
     (c) BOKF shall maintain its existing policy of directors and officers
liability insurance (or comparable coverage) for a period of not less than three
years after the Effective Date; which policy shall be amended, however, to
include the directors and officers of Park Cities, PC Corporation and FNB, and
which shall be a "claims made" policy providing coverage for (among other
things) acts or omissions occurring prior to the Effective Time.

     (d) In the event that BOKF or any of its respective successors or assigns
(i) consolidates with or merges into any other person and shall not be the
continuing or surviving corporation or entity of such consolidation or merger or
(ii) transfers all or substantially all of its properties and assets to any
person, then, and in each such case, the successors and assigns of such entity
shall assume the obligations set forth in this Agreement, which obligations are
expressly intended to be for the irrevocable benefit of, and shall be
enforceable by, each director and officer covered hereby.

         Section 11.3.  BOKF Director Position.  As soon as practicable after
         ------------   ----------------------                               
the Effective Tive, BOKF shall cause (pursuant to a voting agreement with its
controlling shareholder or otherwise) an individual who is currently a non-
officer member of the board of directors of Park Cities mutually agreeable to
the board of directors of Park Cities and BOKF to be elected as a member of the
Board of Directors of BOKF.  BOKF shall continue to cause such person to be
nominated and elected as a director of BOKF for so long as any of the BOKF Notes
remain outstanding.  If for any reason such person cannot or will not serve as a
director of BOKF, BOKF and the board of directors of Park Cities shall mutually
agree to designate another person who was on the Board of Directors of Park
Cities as of the Effective Time to fill such position for such period of time.


                                  ARTICLE XII

                                 MISCELLANEOUS

         Section 12.1.  Entire Agreement.  This Agreement contains the entire
         ------------   ----------------                                     
agreement among BOKF, BOKSub and Park Cities with respect to the Merger, and
supersedes all prior agreements and understandings relating to the subject
matter of this Agreement.

         Section 12.2.  Notices.  All notices or other communications which are
         ------------   -------                                                
required or permitted hereunder shall be in writing and shall be deemed to have
been given or made on the date of delivery, in the case of hand delivery, or
three (3) business days after deposit in the United States Registered Mail,
postage prepaid, or upon receipt if transmitted by facsimile telecopy or any
other means, addressed (in any case) as follows:

         If to BOKF or BOKSub:

         BOK Financial Corporation
         P.O. Box 2300
         Tulsa, OK 79192
         Attention: Mr. Stanley A. Lybarger
         Telecopy No.:  (918) 588-6853


                                     -23-
<PAGE>
 
         With a Copy To:

         Frederic Dorwart, Lawyers
         Old City Hall
         124 E. Fourth St.
         Tulsa, OK  74103-5010
         Attention: Frederic Dorwart, Esq.
         Telecopy No.:  (918) 583-8251

         If to PARK CITIES:

         Park Cities Bancshares, Inc.
         6215 Hillcrest
         P.O. Box 8380
         Dallas, TX 75205
         Attention:  Mr. Tom E. Turner
         Telecopy No.:  (214) 521-9072

         With a Copy To:

         Jackson & Walker, L.L.P.
         901 Main Street
         Suite 6000
         Dallas, TX 75202-3797
         Attention: Dudley Chambers, Esq.
         Telecopy No.:  (214) 953-5822

         Section 12.3.  Counterparts.  This Agreement may be executed in any
         ------------   ------------                                        
number of counterparts, and each such counterpart hereof, including any
facsimile copy thereof, shall be deemed to be an original instrument, but all
such counterparts together shall constitute but one agreement.

         Section 12.4.  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND
         ------------   -------------                                          
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, WITHOUT GIVING
EFFECT TO ANY CHOICE OR CONFLICT OF LAW PROVISION OR RULE THAT WOULD CAUSE THE
APPLICATION OF THE LAWS OF ANY JURISDICTION OTHER THAN THE STATE OF TEXAS.

         Section 12.5.  Venue.  ALL ACTIONS OR PROCEEDINGS WITH RESPECT TO,
         ------------   -----                                              
ARISING DIRECTLY OR INDIRECTLY IN CONNECTION WITH, OUT OF, RELATED TO OR FROM
THIS AGREEMENT OR ANY OF THE OTHER DOCUMENTS SHALL BE LITIGATED IN COURTS HAVING
SITUS IN DALLAS, DALLAS COUNTY, TEXAS, AND EACH PARTY HERETO HEREBY SUBMITS TO
THE JURISDICTION OF ANY SUCH COURT IN ANY SUCH ACTION AND HEREBY WAIVES ANY
RIGHTS IT MAY HAVE TO TRANSFER OR CHANGE THE JURISDICTION OR VENUE OF ANY
LITIGATION BROUGHT AGAINST IT IN ACCORDANCE WITH THIS SECTION.

                                     -24-
<PAGE>
 
         Section 12.6.  Additional Documentation.  As soon as practicable after
         ------------   ------------------------                               
the Effective Time, the parties hereto shall execute and file such documents and
take such other actions as may be necessary or appropriate to effect the
transactions contemplated by this Agreement.

         Section 12.7.  Severability.  If any provision of this Agreement or
         ------------   ------------                                        
the application thereof to any person or circumstance shall, to any extent, be
invalid or unenforceable, the remainder of this Agreement, and the application
of such provision to persons or circumstances other than those to which it is
held invalid and unenforceable, shall not be affected thereby and each provision
of this Agreement shall be valid and enforced to the fullest extent permitted by
law.

         Section 12.8.  Expenses.  Each party shall bear and pay for all of its
         ------------   --------                                               
own costs and expenses incurred in connection with this Agreement or the Merger,
including respective fees and expenses of financial consultants, accountants and
counsel.

         Section 12.9.  Exhibits.  The exhibits and schedules attached to this
         ------------   --------                                              
Agreement, together with all documents incorporated by reference therein, form
an integral part of this Agreement and are hereby incorporated into this
Agreement wherever reference is made to them to the same extent as if they were
set out in full at the point in which the reference is made.  Items disclosed on
any Exhibit or Schedule to this Agreement shall be deemed to be disclosed on all
Exhibits or Schedules hereto and the failure of Park Cities to list any item on
one or more Exhibits or Schedules shall not give rise to a claim by BOKF or
BOKSub.

         Section 12.10. Costs of Litigation.  In any action brought by a party
         -------------  -------------------                                   
hereto to enforce the obligations of any other party hereto, the prevailing
party shall be entitled to collect from the opposing party to such action such
party's reasonable litigation costs and attorneys fees and expenses (including
court costs, reasonable fees of accountants and experts, and other expenses
incidental to the litigation).

     IN WITNESS WHEREOF,the parties hereto have duly executed this Agreement as
of the date and year first above written.

BOK FINANCIAL CORPORATION


By:   /s/  Stanley A. Lybarger
   ----------------------------------------------
   Stanley A. Lybarger, Chief Executive Officer


BOKF MERGER CORPORATION NUMBER FIVE


By:   /s/  Stanley A. Lybarger
   ----------------------------------------------
   Stanley A. Lybarger, President


                                     -25-
<PAGE>
 
PARK CITIES BANCSHARES, INC.


By:      /s/  Tom E. Turner
    -------------------------------------------
   Tom E. Turner
   Chief Executive Officer


THE STATE OF OKLAHOMA         (S)
                              (S)
COUNTY OF   Tulsa             (S)
          ---------               

   I,      June Smoot     , a Notary Public, do hereby certify that on this  3rd
      --------------------                                                  ----
day of October, 1996, personally appeared before me STANLEY A. LYBARGER, who
declared he is the Chief Executive Officer of BOK FINANCIAL CORPORATION and he
is the President of BOKF MERGER CORPORATION NUMBER FIVE, acknowledged that he
signed the foregoing document in the capacities therein set forth and declared
that the statements therein contained are true.

   IN WITNESS WHEREOF, I have hereunto set my hand and seal the date and year
before written.


                                      /s/ June Smoot
                                   ---------------------------------------------
                                   Notary Public, State of Oklahoma
                                       June Smoot
                                   ---------------------------------------------
                                   (Printed or stamped name of Notary)
                                   My Commission Expires:  July 8, 2000
                                                         -----------------------


THE STATE OF TEXAS            (S)
                              (S)
COUNTY OF DALLAS              (S)

   I,     Caron Sherrard      , a Notary Public, do hereby certify that on this
      ------------------------
3rd   day of October, 1996, personally appeared before me TOM E. TURNER, who
- -----                                                                       
declared he is the Chief Executive Officer of PARK CITIES BANCSHARES, INC.
acknowledged that he signed the foregoing document in the capacities therein set
forth and declared that the statements therein contained are true.

   IN WITNESS WHEREOF, I have hereunto set my hand and seal the date and year
before written.

                                      /s/ Caron Sherrard
                                   ---------------------------------------------
                                   Notary Public, State of Texas
                                       Caron Sharrard
                                   ---------------------------------------------
                                   (Printed or stamped name of Notary)
                                   My Commission Expires:    2/3/97
                                                    ----------------------------

                                     -26-
<PAGE>
 
                                   EXHIBIT A

                                PROMISSORY NOTE
                                ---------------

   Amount                        Dallas, Texas                        Date
- -------------                                                    ---------------



   FOR VALUE RECEIVED, the undersigned, BOK Financial Corporation, an Oklahoma
corporation ("Maker"), hereby promises to pay to the order of
              -----                                          
________________________ ("Holder"), at the address of Holder set forth on the
                           ------                                             
signature page hereof, or at such other address given to Maker by Holder, the
principal sum of _____________________________ ($______________), together with
interest, as hereinafter described.

   This Note has been executed and delivered in connection with that certain
Agreement and Plan of Merger (the "Merger Agreement"), dated ______________, by
                                   ----------------                            
and among Maker, BOKF Merger Corporation Number Five, a Texas corporation, and
Park Cities Bancshares, Inc., a Texas corporation, and represents all or a
portion of the Merger Consideration (as defined in the Merger Agreement) due to
Holder.

   [ This Note has been issued under an Indenture dated as of __________, 199_,
("Indenture") between the Maker and _________________, as trustee ("Trustee").
The terms of this Note include those stated in the Indenture and those made part
of the Indenture by reference to the Trust Indenture Act of 1939, as amended, as
in effect on the date of the Indenture.  This Note is subject to all such terms,
and Holder is referred to the Indenture and the Trust Indenture Act for a
statement of such terms.  This Note is an unsecured general obligation of Maker.

   MAKER WILL FURNISH TO ANY HOLDER UPON WRITTEN REQUEST AND WITHOUT CHARGE A
COPY OF THE INDENTURE.  REQUESTS MAY BE MADE TO BOKF FINANCIAL CORPORATION, P.O.
BOX 2300, TULSA, OKLAHOMA, 74103-5010 ATTN: ______________. ]

   Section 1.  Interest and Payment.
   -------------------------------- 

   (a) Prior to the occurrence of a default (hereinafter defined), interest
shall be payable on the outstanding principal balance of this Note at a rate per
annum equal to [the Applicable Federal Rate as defined in the Internal Revenue
               ---------------------------------------------------------------
Code as being in effect on the Closing Date, as defined in the Merger
- ---------------------------------------------------------------------
Agreement].  Interest on this Note shall be calculated at a daily rate equal to
1/360 of the annual percentage rate which this Note bears, subject to the
provisions hereof limiting interest to the Maximum Lawful Rate (as herein
defined).

   (b)  Interest only on this Note shall be due and payable quarterly,
commencing on     (1st day of the first calendar quarter after the Closing Date)
              ------------------------------------------------------------------
and continuing on the first day of each ____________, ____________,
____________, and ______________ thereafter until    (maturity date selected by
                                                  -----------------------------
Holder)    .  The entire outstanding principal balance of this Note and all
- -----------                                                                
accrued but unpaid interest thereon shall be due and payable in full on
                                                                        --
(maturity date selected by Holder)   .
- ------------------------------------- 

   (c)  After the occurrence of a default, for so long as such default remains
uncured or upon acceleration by Holder following a default, past due principal,
and past due interest, to the extent permitted by law, shall bear interest at
the lesser of (i) Maximum Lawful Rate or (ii) 15%.

   (d)  Maker shall not be entitled to prepay this Note in full or in part prior
to the maturity date hereof without the prior written consent of Holder.


                                                                          Page 1
<PAGE>
 
   Section 2.  General Provisions.
   ------------------------------ 

   Whenever any payment shall be due under this Note on a day which is not a
business day, the date on which such payment is due shall be extended to the
next succeeding business day, and such extension of time shall be included in
the computation of the amount of interest then payable.

   All principal, interest and other sums payable under this Note shall be paid,
not later than two o'clock p.m. (Dallas, Texas time), on the day when due, in
immediately available funds in lawful money of the United States of America.
Any payment under this Note other than in the required amount and in good,
unrestricted U.S. funds immediately available to the holder hereof shall not,
regardless of any receipt or credit issued therefor, constitute payment until
the required amount is actually received by the holder hereof in such funds and
shall be made and accepted subject to the condition that any check or draft may
be handled for collection in accordance with the practice of the collection bank
or banks.

   All payments made as scheduled on this Note shall be applied, to the extent
thereof, first to accrued but unpaid interest and the balance to unpaid
principal.

   The occurrence of any one of the following shall be a default under this Note
(a "default"):
    -------   

   (a)  Maker shall fail to pay when due any principal of or interest on this
Note; or

   (b)  Maker (1) (i) executes an assignment for the benefit of creditors, or
takes any action in furtherance thereof; or (ii) admits in writing its inability
to pay, or fails to pay, its debts generally as they become due; or (iii) as a
debtor, files a petition, case, proceeding or other action pursuant to, or
voluntarily seeks the benefit or benefits of any debtor relief law, or takes any
action in furtherance thereof; or (iv) seeks the appointment of a receiver,
trustee, custodian or liquidator of any significant portion of its property; or
(v) becomes subject to any cease-and-desist or other order issued by, or a party
to any written agreement or memorandum of understanding with, or is a recipient
of any extraordinary supervisory  letter from, any regulatory agency; or (2)
suffers the filing of a petition, case, proceeding or other action against it as
a debtor under any debtor relief law or seeking appointment of a receiver,
trustee, custodian or liquidator of any significant portion of its other
property, and (i) admits, acquiesces in or fails to contest diligently the
material allegations thereof; or (ii) the petition, case, proceeding or other
action results in entry of any order for relief or order granting relief sought
against it, or (iii) in a proceeding under Title 11 of the United States Code,
the case is converted from one chapter to another; or (iv) fails to have the
petition, case, proceeding or other action permanently dismissed or discharged
on or before the earlier of trial thereon or sixty (60) days next following the
date of its filing; or (3) conceals, removes, or permits to be concealed or
removed, any part of its property, with intent to hinder, delay or defraud its
creditors or any of them, or makes or suffers a transfer of any of its property
which may be fraudulent under any bankruptcy, fraudulent conveyance or similar
law; or makes any transfer of its property to or for the benefit of a creditor
at a time when other creditors similarly situated have not been paid; or

   (c)  There shall occur (i) a change in control of Maker, Park Cities
Bancshares, Inc., or First National Bank of Park Cities; (ii) a sale of all or
substantially all of the assets of any such entity; or (iii) the liquidation or
dissolution of any such entity.  For the purpose of this Note, a change of
control shall be deemed to have occurred when and only when those persons and
entities who are presently in control of Maker (within the meaning  of Rule 405
of the Securities and Exchange Commission) become no longer in control of Maker
(within the meaning of said Rule 405).


                                                                          Page 2
<PAGE>
 
Upon the occurrence of a default, the holder hereof shall have the right to
declare the unpaid principal balance and accrued but unpaid interest on this
Note at once due and payable (and upon such declaration, the same shall be at
once due and payable), and to exercise any rights, powers and remedies available
to Holder under this Note, or at law or in equity.
 
          Neither the failure by the holder hereof to exercise, nor delay by the
holder hereof in exercising, the right to accelerate the maturity of this Note
or any other right, power or remedy upon any default shall be construed as a
waiver of such default or as a waiver of the right to exercise any such right,
power or remedy at any time.  No single or partial exercise by the holder hereof
of any right, power or remedy shall exhaust the same or shall preclude any other
or further exercise thereof, and every such right, power or remedy may be
exercised at any time and from time to time.  All rights and remedies provided
for in this Note are cumulative of each other and of any and all other rights
and remedies existing at law or in equity, and the holder hereof shall, in
addition to the rights and remedies provided herein, be entitled to avail itself
of all such other rights and remedies as may now or hereafter exist at law or in
equity for the collection of the indebtedness owing hereunder, and the resort to
any right or remedy provided for hereunder or provided for by law or in  equity
shall not prevent the concurrent or subsequent employment of any other
appropriate rights or remedies.  Without limiting the generality of the
foregoing provisions, the acceptance by the holder hereof from time to time of
any payment under this Note which is past due or which is less than the payment
in full of all amounts due and payable at the time of such payment, shall not
(i) constitute a waiver of or impair or extinguish the rights of the holder
hereof to accelerate the maturity of this Note or to exercise any other right,
power or remedy at the time or at any subsequent time, or nullify any prior
exercise of any such right, power or remedy, or (ii) constitute a waiver of the
requirement of punctual payment and performance, or a novation in any respect.

   If any holder of this Note retains an attorney in connection with any default
or at maturity or to collect, enforce or defend this Note in any lawsuit or in
any probate, reorganization, bankruptcy or other proceeding, or if any holder of
this Note sues Maker in connection with this Note, then Maker agrees to pay to
holder, all costs and expenses incurred by such prevailing party in any such
suit or proceeding, including attorneys' fees.

   It is the intent of Holder and Maker to conform to and contract in strict
compliance with applicable usury law from time to time in effect.  All
agreements between Holder or any other holder hereof and Maker are hereby
limited by the provisions of this paragraph which shall override and control all
such agreements, whether now existing or hereafter arising and whether written
or oral.  In no way, nor in any event or contingency (including but not limited
to prepayment, default, demand for payment, or acceleration of the maturity of
any obligation), shall the rate of interest taken, reserved, contracted for,
charged or received under this Note or otherwise, exceed the maximum rate of
interest permitted by applicable law (the "Maximum Lawful Rate").  If, from any
                                           -------------------                 
possible construction of any document, interest would otherwise be payable in
excess of the Maximum Lawful Rate, any such construction shall be subject to the
provisions of this paragraph and such document shall be automatically reformed
and the interest payable shall be automatically reduced to the Maximum Lawful
Rate, without the necessity of execution of any amendment or new document.  If
the holder hereof shall ever receive anything of value which is characterized as
interest under applicable law and which would apart from this provision be in
excess of the Maximum Lawful Rate, an amount equal to the amount which would
have been excessive interest shall, without penalty, be applied to the reduction
of the principal amount owing on the indebtedness evidenced hereby in the
inverse order of its maturity and not to the payment of interest, or refunded to
Maker or the other payor thereof if and to the extent such amount which would
have been excessive exceeds such unpaid principal.  The right to accelerate the
maturity of this Note does not include the right to accelerate any interest
which has not otherwise accrued on the date of such acceleration, and the holder
hereof does not intend to charge or receive any unearned interest in the event
of

                                                                          Page 3
<PAGE>
 
acceleration.  All interest paid or agreed to be paid to the holder hereof
shall, to the extent permitted by applicable law, be amortized, prorated,
allocated and spread throughout the full stated term (including any renewal or
extension) of such indebtedness so that the amount of interest on account of
such indebtedness does not exceed the maximum nonusurious amount permitted by
applicable law.  As used in this paragraph, the term "applicable law" shall mean
the laws of the State of Texas or the federal laws of the United States,
whichever laws allow the greater interest, as such laws now exist or may be
changed or amended or come into effect in the future.

   Maker and all sureties, endorsers, guarantors and any other party now or
hereafter liable for the payment of this Note in whole or in part, hereby
severally waive demand, presentment for payment, notice of dishonor and of
nonpayment, protest, notice of protest, notice of intent to accelerate, notice
of acceleration and all other notices of any kind.

   This Note may not be changed, amended or modified except in a writing
expressly intended for such purpose and executed by the party against whom
enforcement of the change, amendment or modification is sought.

   All of the covenants, stipulations, promises, and agreements contained in
this Note by or on behalf of Maker shall bind its successors and assigns,
whether so expressed or not.

   THIS NOTE, AND ITS VALIDITY, ENFORCEMENT AND INTERPRETATION, SHALL BE
GOVERNED BY TEXAS LAW (WITHOUT REGARD TO ANY CONFLICT OF LAWS PRINCIPLES) AND
APPLICABLE UNITED STATES FEDERAL LAW.

   Time shall be of the essence in this Note with respect to all of Maker's
obligations hereunder.

   THIS NOTE REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS
OF THE PARTIES.

   THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

   IN WITNESS WHEREOF, Maker has duly executed this Note to be effective as of
the day and year first above written.

                                    MAKER:
                                    ----- 

ADDRESS OF HOLDER:                  BOK FINANCIAL CORPORATION,
- -----------------                   an Oklahoma corporation


                                    By:
- ----------------------------           ----------------------------------
                                    Name:
- ----------------------------             --------------------------------
                                    Title:
- ----------------------------              -------------------------------


                                                                          Page 4
<PAGE>
 
                                   EXHIBIT B
                                   ---------


                             EMPLOYMENT AGREEMENT
                             --------------------


   This Employment Agreement ("Agreement") is made, effective this ___ day of
______________, 1997 between First National Bank of Park Cities, a national
banking association (the "Bank") and Tom E. Turner, an individual residing in
Dallas, Texas (the "Executive").

   The Bank and Executive, in consideration of the promises and covenants set
forth herein (the receipt and adequacy of which is hereby acknowledged) and
intending to be legally bound hereby, agree as follows:

(1) PURPOSE OF THIS AGREEMENT.  The purpose of this agreement is as follows:
    -------------------------                                               

    (a)   The Bank is a national association formed under and pursuant to the
          laws of the United States of America.  The Bank is engaged in the
          banking business in Dallas, Texas.

    (b)   The Executive is currently serving as the Chief Executive Officer
          and Chairman of the Board of Directors of the Bank. The Executive
          currently has no written agreement of employment with the Bank, but
          the Executive is currently receiving salary compensation and other
          benefits from the Bank (collectively, the "Current Benefits"). In
          addition, the Executive and the Bank have heretofore entered into that
          certain Amended and Restated Defined Benefit Deferred Compensation and
          Salary Continuation Agreement dated effective January 1, 1986 (as
<PAGE>
 
          amended and restated on June 3, 1991, hereafter called the "Deferred
          Compensation Agreement").

    (c)   Pursuant to an Agreement And Plan of Merger dated September ____,
          1996 (the "Merger Agreement"), among BOK Financial Corporation
          ("BOKF"), Park Cities Bancshares, Inc. ("Park Cities"), and BOKF
          Merger Corporation Number Five ("BOKSub"), BOKF is acquiring indirect
          ownership of the Bank (the "Merger").  Upon and subject to
          consummation of the Merger, the Bank desires to retain the services of
          Executive and the Executive desires to continue to render services to
          the Bank.

    (d)   The purpose of this Agreement is to set forth the terms and
          conditions (i) on which the Bank shall, subject to consummation of the
          Merger, employ the Executive from and after consummation of the Merger
          and (ii) on which the Executive agrees not to compete with the Bank.

(2) EMPLOYMENT.  The Bank hereby employs the Executive, and the Executive hereby
    ----------                                                                  
    agrees to work for the Bank, on the following terms and conditions:

    (a)   Executive shall serve as Chairman of the Board and Chief Executive
          Officer of the Bank, subject to the direction of the Board of
          Directors of the Bank and of the Chief Executive Officer of BOKF;
          provided, that, in the event of a conflict between the directions
          being given by the Board of Directors of the Bank and the Chief
          Executive Officer of BOKF, the Executive shall act in accordance with
          the directions of the Board of Directors of the Bank.

                                      -2-
<PAGE>
 
    (b)   Executive shall devote his full time, attention and efforts,
          exclusively on behalf of the Bank.

    (c)   Executive shall devote all time and attention reasonably necessary
          to the affairs of the Bank and shall serve the Bank diligently,
          loyally, and to the best of his ability.

    (d)   Executive shall serve in such other or additional positions as an
          officer and/or director of the Bank as the Executive and Board of
          Directors of the Bank may mutually agree or of any affiliate of the
          Bank as Executive and the Chief Executive officer of BOKF may mutually
          agree; provided, however, Executive's residence and place of work
          shall remain in Dallas, Texas.

    (e)   Notwithstanding anything herein to the contrary, Executive shall not
          be precluded from engaging in any charitable, civic, political or
          community activity or membership in any professional organization.

(3) COMPENSATION.  As the sole, full and complete compensation to the Executive
    ------------                                                               
    for the performance of all duties of Executive under this Agreement and for
    all services rendered by Executive to the Bank or to any affiliate of the
    Bank:

    (a)   The Bank shall pay to Executive the sum of two hundred fifty two
          thousand nine hundred dollars ($252,900) per year payable in
          installments in arrears, less usual and customary payroll deductions
          for FICA, federal and state withholding, and the like, at the times
          and in the manner in effect in accordance with the usual and customary
          payroll policies generally in effect from time to time at the Bank
          ("Annual Salary").

                                      -3-
<PAGE>
 
    (b)   The Bank shall pay and provide to Executive pension, thrift,
          medical insurance, disability insurance plan benefits, and other
          fringe benefits, generally in effect for senior executive employees of
          BOKF and its affiliates (the "Additional Benefits"). The pension
          benefits provided to BOKF employees are fully described in the
          official plan document but include a contribution initially equal to
          8% of pay.  Executive shall be credited with his prior service at Park
          Cities and its affiliates in BOKF's 401k and in connection with the
          Additional Benefits, other than in connection with BOKF's pension
          plan.  Executive shall not be credited with prior service in BOKF's
          pension plan, but shall (i) be able to participate in BOKF's pension
          plan immediately upon consummation of the Merger and (ii) in the event
          Executive is not vested at the time Executive's employment with the
          Bank is terminated (for whatever reason), Bank shall pay Executive an
          amount equal to pension plan contributions made by the Bank in respect
          of Executive.

    (c)   The Bank may, from time to time in Bank's sole discretion
          consistent with the practices generally in effect for senior executive
          employees of BOKF and its affiliates, pay or provide, or agree to pay
          or provide, Executive a bonus, stock option, or other incentive or
          performance based compensation and shall provide the compensation set
          forth in paragraph 3(g) below.  All such bonus, stock option or other
          incentive or performance based compensation, regardless of its nature
          (hereinafter called "Performance Compensation") shall not constitute
          Annual Salary.

                                      -4-
<PAGE>
 
    (d)   The Bank shall reimburse Executive for reasonable and necessary
          entertainment, travel and other expenses in accordance with BOKF's
          standard policies in general effect for senior executive employees of
          BOKF affiliates (which includes dues for lunch clubs, but does not
          include reimbursement for country club memberships or dues).

    (e)   The Executive shall be allowed vacation, holidays, and other
          employee benefits not described above in accordance with the Bank's
          standard policy in general effect for Bank's senior executive
          employees.

    (f)   The Executive shall be considered for the award of options pursuant
          to BOKF's 1997 stock option plan (not yet adopted) on the same basis
          as other senior executives of BOKF and its affiliates.

    (g)   Upon consummation of the Merger, the Bank shall:

          (i)   transfer to Executive ownership of that certain 1996 Cadillac
                STS automobile currently being driven by Executive;

          (ii)  transfer to Executive the ownership and obligations of that
                certain Connecticut Mutual Life whole life insurance policy (No.
                4546452) in the face amount of $300,000; and,

          (iii) transfer to Executive ownership and obligations of that
                certain Connecticut Mutual Life term life insurance policy (No.
                6164852) in the face amount of $500,000.


                                      -5-
<PAGE>
 
    (h)   The Bank shall continue in effect, and provide the Executive the
          benefits set forth in, the Deferred Compensation Agreement, subject to
          the modifications described in paragraph 4 of this Agreement.

    (i)   The Bank shall continue in effect the long term disability
          insurance provided to the Executive prior to the effective date of the
          Merger.

    (j)   So long as the Executive remains a member of the Board of Directors
          of the Bank, the Bank shall pay the Executive the same fees as are
          generally paid to other members of the Board of Directors of the Bank.

    (k)   Executive hereby agrees to accept the foregoing compensation in
          lieu of all Current Benefits and as the sole, full and complete
          compensation to Executive for the performance of all duties of
          Executive under this Agreement and for all services rendered by
          Executive to the Bank or any affiliate of the Bank.

(4) DEFERRED COMPENSATION AGREEMENT.  The Deferred Compensation Agreement shall
    -------------------------------                                            
    remain in full force and effect upon consummation of the Merger in
    accordance with its terms, subject to the following provisions:

    (a)   Existing paragraph 6 of the Deferred Compensation Agreement shall
          be deleted in its entirety and there shall be substituted therefor,
          the following new paragraph 6:

          "Assignment of Insurance Benefits.  Upon termination of the Employee's
           --------------------------------                                     
          employment for any reason (other than death) prior to age sixty-five
          (65), the Corporation shall retain the life insurance policy described
          in paragraph 7 below and shall continue to maintain such policy as a
          reserve for the payments required to be paid to the


                                      -6-
<PAGE>
 
          Employee pursuant to this Agreement as described in paragraph 7
          below."

    (b)   The Merger shall, for the purposes of the Deferred Compensation
          Agreement, be deemed not to be a "change of control"; provided,
          however, this is not intended to limit or modify the definition of
          "change of control", as that meaning is used in the Defined
          Compensation Agreement, with respect to any future transaction.

(5) TERM OF THIS AGREEMENT.  The term of this Agreement (the "Term") shall
    ----------------------                                                
    commence (the "Commencement") as of the commencement of the first pay-roll
    period immediately preceding the effective date of the Merger and shall
    terminate on the third anniversary date of the Commencement.

(6) TERMINATION OF THIS AGREEMENT.  Notwithstanding the provisions of paragraph
    -----------------------------                                              
    5 of this Agreement, this Agreement may be terminated on the following terms
    and conditions:

    (a)   Termination by Bank for Cause.  The Bank may terminate this
          -----------------------------                              
          Agreement for cause on the following terms and conditions:

          (i)  The Bank shall be deemed to have cause to terminate
               Executive's employment only in one of the following events:

               (A)  The Executive shall willfully fail to substantially
                    perform his obligations under this Agreement (it being
                    understood that any such failure resulting from Executive's
                    incapacity due to physical or


                                      -7-
<PAGE>
 
                    mental illness shall not be deemed willful);

               (B)  Any act which is intended by Executive to materially
                    injure the Bank;

               (C)  Any criminal act involving moral turpitude;

               (D)  Any dishonest or fraudulent act; or,

               (E)  Any refusal to obey written orders or instructions of the
                    Board of Directors of the Bank unless such instructions
                    would require Executive to commit an illegal act, could
                    subject Executive to personal liability, would require
                    Executive to violate the terms of this Agreement, or would
                    otherwise be inconsistent with the duties of an officer of a
                    national banking association.

          (ii) The Bank shall be deemed to have cause to terminate
               Executive's employment only when a majority of the members of the
               Board of Directors of the Bank finds that, in the good faith
               opinion of such majority, the Executive committed any of the acts
               set forth in clauses (A) through (E) of the preceding
               subparagraph, such finding to have been made after at least five
               (5) business


                                      -8-
<PAGE>
 
               days' notice to the Executive and an opportunity for the
               Executive, together with his counsel, to be heard before such
               majority.  The determination of such majority, made as set forth
               above, shall be binding upon the Bank and the Executive, absent
               bad faith or willful misconduct.

          (iii)The effective date of a termination for cause shall be the
               date of the action of such majority finding the termination was
               with cause.  In the event the Bank terminates this Agreement for
               cause, (A) the Bank shall pay Executive the Executive's then
               Annual Salary through, but not beyond, the effective date of the
               termination, (B) the Executive shall receive those Benefits
               accrued through but not beyond the effective date of such
               termination which are thereafter payable under the terms and
               provisions of benefit plans then in effect in accordance with
               paragraph 3(b) above, and (C) the Executive shall receive any
               benefits provided under, and pursuant to the terms of, the
               Deferred Compensation Agreement, as modified by paragraph 4 of
               this Agreement.

    (b)   Termination By the Executive. The Executive may, at anytime after
          ----------------------------                                     
          the first anniversary date of the consummation of the Merger,
          terminate this Agreement on the following terms and conditions:


                                      -9-
<PAGE>
 
          (i)  The Executive may give written notice of termination to the
               Bank.  The termination shall be effective on the fifteenth (15th)
               business day following the notice of termination.

          (ii) Upon termination by the Executive, the Bank shall have no
               obligation to Executive under this Agreement beyond the effective
               date of the termination; provided, however, that the Executive
               shall be entitled to receive any benefits, insured or otherwise,
               that Executive would otherwise be able to receive under any
               benefit plan of the Bank of which Executive is a beneficiary in
               accordance with paragraph 3(b), and the Executive shall receive
               any benefits provided under, and pursuant to the terms of, the
               Deferred Compensation Agreement, as modified by this Agreement.

    (c)   Death of Executive. In the event of Executive's death during the
          ------------------                                              
          term of this Agreement, this Agreement shall terminate at the date of
          Executive's death and the Bank shall have no obligation to Executive
          under this Agreement beyond the effective date of the termination;
          provided, however, the Executive shall be entitled to receive any
          benefits, insured or otherwise, that Executive would otherwise be able
          to receive under any benefit plan of the Bank of which Executive is a
          beneficiary in accordance with paragraph 3(b), and the Executive shall


                                     -10-
<PAGE>
 
          receive any benefits provided under, and pursuant to the terms of, the
          Deferred Compensation Agreement, as modified by this Agreement.

(7) AGREEMENT NOT TO COMPETE.  The provisions of this paragraph 7 are hereafter
    ------------------------                                                   
    called the "Non-Competition Agreement".

    (a)   Executive agrees that for a period of 24 months after the
          termination of Executive's employment with the Bank, for whatever
          reason such employment may cease and whether for cause or without
          cause, Executive shall not directly or indirectly (whether as an
          officer, director, employee, partner, stockholder, creditor or agent,
          or representative of other persons or entities) (i) engage in the
          banking business generally or in any business in which the Bank has,
          as of the date of such termination engaged, in the Dallas Metroplex
          Area or within any area within a one hundred mile radius of the
          geographical center of Dallas, Texas or (ii) solicit clients of Bank
          or Bank's affiliates or solicit employees of Bank or Bank's affiliates
          to seek employment with any person or entity except the Bank and its
          affiliates, whether, in either case, such solicitation is made within
          or without the area described in this paragraph 7, except that this
          Non-Competition Agreement shall not be binding on Executive if the
          Bank shall have breached its obligations under this Agreement.

    (b)   Except in the event of the termination of Executive's employment
          with the Bank pursuant to the provisions of paragraph 6(a) or
          paragraph 6(b) of this Agreement, the Bank shall pay Executive during
          such period of non-competition (in addition to the consideration being
          received by


                                     -11-
<PAGE>
 
          Executive by reason of the Merger and under the Deferred Compensation
          Agreement), (i) the sum of Nine Thousand Five Hundred and No/100
          dollars ($9,500.00) for each full calendar month payable on the first
          day of each calendar commencing with the first calendar month of the
          period of non-competition and (ii) the Bank shall continue in effect,
          and provide to the Executive, the same or similar medical insurance
          and disability insurance as provided to the Executive immediately
          prior to such termination.

    (c)   Executive agrees that (i) this Non-Competition Agreement is entered
          into in connection with the sale to BOKF of the goodwill of the
          business of the Bank, (ii) Executive is receiving valuable
          consideration in the Merger for this Non-Competition Agreement, (iii)
          the restrictions imposed upon Executive by this Non-Competition
          Agreement are essential and necessary to ensure BOKF acquires the
          goodwill of the Bank, and (iv) all the restrictions (including
          particularly the time and geographical limitations) set forth in this
          Non-Competition Agreement are fair and reasonable.

    (d)   Executive agrees that any remedy at law for any breach of this Non-
          Competition Agreement would be inadequate and, in the event of any
          such breach, the Bank shall be entitled to both immediate and
          permanent injunctive relief to preclude any such breach (in addition
          to any remedies of law which the Bank may be entitled).

(8) MISCELLANEOUS PROVISIONS.  The following miscellaneous provisions shall
    ------------------------                                               
    apply to this Agreement:


                                     -12-
<PAGE>
 
    (a)   All notices or advices required or permitted to be given by or
          pursuant to this Agreement, shall be given in writing.  All such
          notices and advices shall be (i) delivered personally, (ii) delivered
          by facsimile or delivered by U.S. Registered or Certified Mail, Return
          Receipt Requested mail, or (iii) delivered for overnight delivery by a
          nationally recognized overnight courier service.  Such notices and
          advices shall be deemed to have been given (i) the first business day
          following the date of delivery if delivered personally or by
          facsimile, (ii) on the third business day following the date of
          mailing if mailed by U.S. Registered or Certified Mail, Return Receipt
          Requested, or (iii) on the date of receipt if delivered for overnight
          delivery by a nationally recognized overnight courier service.  All
          such notices and advices and all other communications related to this
          Agreement shall be given as follows:

          If to the Bank:

                    BOK Financial Corporation
                    P.O. Box 2300
                    Tulsa, OK 74192
                    Attention: Stanley A. Lybarger
                    Telecopy No.: (918) 588-6888

                    and

                    First National Bank of Park Cities, National Association
                    6125 Hillcrest
                    P.O. Box 8380
                    Dallas, TX 75205
                    Attention:  Mr. Tom E. Turner
                    Telecopy No.: (214) 521-9072

                    With a Copy to:


                                     -13-
<PAGE>
 
                    Frederic Dorwart
                    Old City Hall
                    124 East Fourth Street
                    Tulsa, OK 74103-5010
                    Telecopy No.: (918) 583-8251

          If to Executive:

                    Tom E. Turner
                    6125 Hillcrest
                    P.O. Box 8380
                    Dallas, TX 75205
                    Telecopy No.: (214) 521-9072

                    With Copy To:

                    Jackson & Walker, L.L.P.
                    901 Main Street - Suite 6000
                    Dallas, TX 75202-3797
                    Attention: Dudley Chambers, Esq.
                    Telecopy No.: (214) 953-5822

          or to such other address as the party may have furnished to the other
          parties in accordance herewith, except that notice of change of
          addresses shall be effective only upon receipt.

    (b)   This Agreement is made and executed in Dallas County, Texas, and
          all actions or proceedings with respect to, arising directly or
          indirectly in connection with, out of, related to or from this
          Agreement, shall be litigated in courts having situs in Dallas, Dallas
          County, Texas.

    (c)   This Agreement shall be subject to, and interpreted by and in
          accordance with, the laws (excluding conflict of law provisions) of
          the State of Texas.

    (d)   This Agreement and the Deferred Compensation Agreement is the
          entire Agreement of the parties respecting the subject matter hereof.
          There are no other agreements, representations or warranties, whether


                                     -14-
<PAGE>
 
          oral or written, respecting the subject matter hereof, except as
          stated in this Agreement and the Deferred Compensation Agreement.

    (e)   This Agreement, and all the provisions of this Agreement, shall be
          deemed drafted by all of the parties hereto.

    (f)   This Agreement shall not be interpreted strictly for or against any
          party, but solely in accordance with the fair meaning of the
          provisions hereof to effectuate the purposes and interest of this
          Agreement.

    (g)   Each party hereto has entered into this Agreement based solely upon
          the agreements, representations and warranties expressly set forth
          herein and upon his own knowledge and investigation. Neither party has
          relied upon any representation or warranty of any other party hereto
          except any such representations or warranties as are expressly set
          forth herein.

    (h)   Each of the persons signing below on behalf of a party hereto
          represents and warrants that he or she has full requisite power and
          authority to execute and deliver this Agreement on behalf of the
          parties for whom he or she is signing and to bind such party to the
          terms and conditions of this Agreement.

    (i)   This Agreement may be executed in counterparts, each of which shall
          be deemed an original.  This Agreement shall become effective only
          when all of the parties hereto shall have executed the original or
          counterpart hereof.  This Agreement may be executed and delivered by a
          facsimile transmission of a counterpart signature page hereof.


                                     -15-
<PAGE>
 
    (j)   In any action brought by a party hereto to enforce the obligations
          of any other party hereto, the prevailing party shall be entitled to
          collect from the opposing party to such action such party's reasonable
          litigation costs and attorneys fees and expenses (including court
          costs, reasonable fees of accountants and experts, and other expenses
          incidental to the litigation).

    (k)   This Agreement shall be binding upon and shall inure to the benefit
          of the parties and their respective successors and assigns.  The Bank
          agrees that if it merges, consolidates, or combines with any other
          business entity, it shall cause the succeeding or continuing
          corporation or business entity to expressly assume and confirm in
          writing the obligations of the Bank under this Agreement.

    (l)   This is not a third party beneficiary contract, except BOKF
          (including each affiliate thereof) shall be a third party beneficiary
          of this Agreement. No person or entity other than a party signing this
          Agreement and those designated as a third party beneficiary herein
          shall have any rights under this Agreement.

    (m)   This Agreement may be amended or modified only in a writing which
          specifically references this Agreement.

    (n)   A party to this Agreement may decide or fail to require full or
          timely performance of any obligation arising under this Agreement. The
          decision or failure of a party hereto to require full or timely
          performance of any obligation arising under this Agreement (whether on
          a single occasion or on multiple occasions) shall not be deemed a


                                     -16-
<PAGE>
 
          waiver of any such obligation. No such decisions or failures shall
          give rise to any claim of estoppel, laches, course of dealing,
          amendment of this Agreement by course of dealing, or other defense of
          any nature to any obligation arising hereunder.

    (o)   In the event any provision of this Agreement, or the application of
          such provision to any person or set of circumstances, shall be
          determined to be invalid, unlawful, or unenforceable to any extent for
          any reason, the remainder of this Agreement, and the application of
          such provision to persons or circumstances other than those as to
          which it is determined to be invalid, unlawful, or unenforceable,
          shall not be affected and shall continue to be enforceable to the
          fullest extent permitted by law.

   Dated and effective the date first set forth above.

                               FIRST NATIONAL BANK OF PARK CITIES,
                                  NATIONAL ASSOCIATION


                               By:
                                  ---------------------------------


                               ------------------------------------
                               Tom E. Turner


                                     -17-
<PAGE>
 
                                   EXHIBIT C
                                   ---------


                             EMPLOYMENT AGREEMENT
                             --------------------


      This Employment Agreement ("Agreement") is made, effective this ___ day of
______________, 1997 between First National Bank of Park Cities, a national
banking association (the "Bank") and C. Thomas Abbott, an individual residing in
Dallas, Texas (the "Executive").

      The Bank and Executive, in consideration of the promises and covenants set
forth herein (the receipt and adequacy of which is hereby acknowledged) and
intending to be legally bound hereby, agree as follows:

(1)   PURPOSE OF THIS AGREEMENT.  The purpose of this agreement is as follows:
      -------------------------                                               

      (a)   The Bank is a national association formed under and pursuant to
            the laws of the United States of America.  The Bank is engaged in
            the banking business in Dallas, Texas.

      (b)   The Executive is currently serving as the President of the Bank.
            The Executive currently has no written agreement of employment with
            the Bank, but the Executive is currently receiving salary
            compensation and other benefits from the Bank (collectively, the
            "Current Benefits").

      (c)   Pursuant to an Agreement And Plan of Merger dated September ____,
            1996 (the "Merger Agreement"), among BOK Financial Corporation
            ("BOKF"), Park Cities Bancshares, Inc. ("Park Cities"), and BOKF
            Merger Corporation Number Five ("BOKSub"), BOKF is acquiring
            indirect ownership of the Bank (the "Merger").  Upon and subject to
            consummation of the Merger, the Bank desires to
<PAGE>
 
            retain the services of Executive and the Executive desires to
            continue to render services to the Bank.

      (d)   The purpose of this Agreement is to set forth the terms and
            conditions (i) on which the Bank shall, subject to consummation of
            the Merger, employ the Executive from and after consummation of the
            Merger and (ii) on which the Executive agrees not to compete with
            the Bank.

(2)   EMPLOYMENT.  The Bank hereby employs the Executive, and the Executive
      ----------                                                           
      hereby agrees to work for the Bank, on the following terms and conditions:

      (a)   Executive shall serve as President of the Bank, subject to the
            direction of the Chairman of the Board of Directors of the Bank and
            of the Chief Executive Officer of BOKF; provided, that, in the event
            of a conflict between the directions being given by the Board of
            Directors of the Bank and the Chief Executive Officer of BOKF, the
            Executive shall act in accordance with the directions of the Board
            of Directors of the Bank.

      (b)   Executive shall devote his full time, attention and efforts,
            exclusively on behalf of the Bank.

      (c)   Executive shall devote all time and attention reasonably
            necessary to the affairs of the Bank and shall serve the Bank
            diligently, loyally, and to the best of his ability.

      (d)   Executive shall serve in such other or additional positions as an
            officer and/or director of the Bank as the Executive and Board of
            Directors of the Bank may mutually agree or of any affiliate of the


                                      -2-
<PAGE>
 
            Bank as Executive and the Chief Executive Officer of BOKF may
            mutually agree; provided, however, Executive's residence and place
            of work shall remain in Dallas, Texas.

      (e)   Notwithstanding anything herein to the contrary, Executive shall not
            be precluded from engaging in any charitable, civic, political or
            community activity or membership in any professional organization.

(3)   COMPENSATION.  As the sole, full and complete compensation to the
      ------------                                                     
      Executive for the performance of all duties of Executive under this
      Agreement and for all services rendered by Executive to the Bank or to any
      affiliate of the Bank:

      (a)   The Bank shall pay to Executive the sum of one hundred fifty two
            thousand five hundred dollars ($152,500) per year payable in
            installments in arrears, less usual and customary payroll deductions
            for FICA, federal and state withholding, and the like, at the times
            and in the manner in effect in accordance with the usual and
            customary payroll policies generally in effect from time to time at
            the Bank ("Annual Salary").

      (b)   The Bank shall pay and provide to Executive pension, thrift,
            medical insurance, disability insurance plan benefits, and other
            fringe benefits, generally in effect for senior executive employees
            of BOKF and its affiliates (the "Additional Benefits"). The pension
            benefits provided to BOKF employees are fully described in the
            official plan document but include a contribution initially equal to
            8% of pay. Executive shall be credited with his prior service at
            Park Cities and its affiliates in BOKF's 401k and in connection with
            the Additional


                                      -3-
<PAGE>
 
            Benefits, other than in connection with BOKF's pension plan.
            Executive shall not be credited with prior service in BOKF's pension
            plan, but (i) shall be able to participate in BOKF's pension plan
            immediately upon consummation of the Merger and (ii) in the event
            Executive is not vested at the time Executive's employment with the
            Bank is terminated (for whatever reason), Bank shall pay Executive
            an amount equal to pension plan contributions made by the Bank in
            respect of Executive.

      (c)   The Bank may, from time to time in Bank's sole discretion
            consistent with the practices generally in effect for senior
            executive employees of BOKF and its affiliates, pay or provide, or
            agree to pay or provide Executive a bonus, stock option, or other
            incentive or performance based compensation. All such bonus, stock
            option or other incentive or performance based compensation,
            regardless of its nature (hereinafter called "Performance
            Compensation") shall not constitute Annual Salary.

      (d)   The Bank shall reimburse Executive for reasonable and necessary
            entertainment, travel and other expenses in accordance with BOKF's
            standard policies in general effect for senior executive employees
            of BOKF affiliates (which includes dues for lunch clubs, but does
            not include reimbursement for country club memberships or dues).

      (e)   The Executive shall be allowed vacation, holidays, and other
            employee benefits not described above in accordance with the Bank's


                                      -4-
<PAGE>
 
            standard policy in general effect for Bank's senior executive
            employees.

      (f)   The Executive shall be considered for the award of options
            pursuant to BOKF's 1997 stock option (not yet adopted) on the same
            basis as other senior executives of BOKF and its affiliates.

      (g)   So long as the Executive remains a member of the Board of
            Directors of the Bank, the Bank shall pay the Executive the same
            fees as are generally paid to other members of the Board of
            Directors of the Bank.

      (h)   Executive hereby agrees to accept the foregoing compensation in
            lieu of all Current Benefits and as the sole, full and complete
            compensation to Executive for the performance of all duties of
            Executive under this Agreement and for all services rendered by
            Executive to the Bank or any affiliate of the Bank.

(4)   TERM OF THIS AGREEMENT.  The term of this Agreement (the "Term") shall
      ----------------------                                                
      commence (the "Commencement") as of the commencement of the first pay-roll
      period immediately preceding the effective date of the Merger and shall
      terminate on the third anniversary date of the Commencement.

(5)   TERMINATION OF THIS AGREEMENT.  Notwithstanding the provisions of
      -----------------------------                                    
      paragraph 4 of this Agreement, this Agreement may be terminated on the
      following terms and conditions:

      (a)   Termination by Bank for Cause.  The Bank may terminate this
            -----------------------------                              
            Agreement for cause on the following terms and conditions:


                                      -5-
<PAGE>
 
             (i) The Bank shall be deemed to have cause to terminate Executive's
                 employment only in one of the following events:

                 (A)   The Executive shall willfully fail to substantially
                       perform his obligations under this Agreement (it being
                       understood that any such failure resulting from
                       Executive's incapacity due to physical or mental illness
                       shall not be deemed willful);

                 (B)   Any intentional act which is intended by Executive to
                       materially injure the Bank;

                 (C)   Any criminal act involving moral turpitude;

                 (D)   Any dishonest or fraudulent act; or,

                 (E)   Any refusal to obey written orders or instructions of
                       the Board of Directors of the Bank unless such
                       instructions would require Executive to commit an illegal
                       act, could subject Executive to


                                      -6-
<PAGE>
 
                       personal liability, would require Executive to violate
                       the terms of this Agreement, or would otherwise be
                       inconsistent with the duties of an officer of a national
                       banking association.

            (ii) The Bank shall be deemed to have cause to terminate
                 Executive's employment only when a majority of the members of
                 the Board of Directors of the Bank finds that, in the good
                 faith opinion of such majority, the Executive committed any of
                 the acts set forth in clauses (A) through (E) of the preceding
                 subparagraph, such finding to have been made after at least
                 five (5) business days' notice to the Executive and an
                 opportunity for the Executive, together with his counsel, to be
                 heard before such majority.  The determination of such
                 majority, made as set forth above, shall be binding upon the
                 Bank and the Executive, absent bad faith or willful misconduct.

           (iii) The effective date of a termination for cause shall be the
                 date of the action of such majority finding the termination was
                 with cause.  In the event the Bank terminates this Agreement
                 for cause, (A) the Bank

                                      -7-
<PAGE>
 
                 shall pay Executive the Executive's then Annual Salary through,
                 but not beyond, the effective date of the termination and (B)
                 the Executive shall receive those Benefits accrued through but
                 not beyond the effective date of such termination which are
                 thereafter payable under the terms and provisions of benefit
                 plans then in effect in accordance with paragraph 3(b) above.

      (b)   Termination By the Executive. The Executive may, at any time
            ----------------------------                                
            after the first anniversary date of the consummation of the Merger,
            terminate this Agreement on the following terms and conditions:

            (i)  The Executive may give written notice of termination to the
                 Bank.  The termination shall be effective on the fifteenth
                 (15th) business day following the notice of termination.

            (ii) Upon termination by the Executive, the Bank shall have no
                 obligation to Executive under this Agreement beyond the
                 effective date of the termination; provided, however, that the
                 Executive shall be entitled to receive any benefits, insured or
                 otherwise, that Executive would otherwise be able to receive
                 under any benefit plan of the Bank of which Executive is a
                 beneficiary in accordance with paragraph 3(b).


                                      -8-
<PAGE>
 
(6)   DEATH OF EXECUTIVE. In the event of Executive's death during the term of
      ------------------                                                      
      this Agreement, his estate, legal representatives, or named beneficiaries
      (as set forth in a writing by Executive delivered to the Bank prior to
      death) (i) shall be paid Executive's Annual Salary and Benefits for a
      period of six (6) months following the date of Executive's death and (ii)
      shall receive those benefits which are accrued through the date six (6)
      months after the date of Executive's death and which are thereafter
      payable under the terms and provisions of the benefit plans then in effect
      in accordance with paragraph 3(b) above.

(7)   PROVISIONS RESPECTING ILLNESS.  In the event Executive is unable to
      -----------------------------                                      
      perform his duties under this Agreement on a full-time basis for a period
      of six (6) consecutive months by reason of illness or other physical or
      mental disability, and at or before the end of such period, Executive does
      not return to work on a full-time basis, the Bank may terminate this
      Agreement without further or additional compensation being due the
      Executive from the Bank except annual salary and benefits accrued through
      the date of such termination under benefit plans then in effect in
      accordance with paragraph 3(b) above.

(8)   AGREEMENT NOT TO COMPETE.  The provisions of this paragraph 8 are
      ------------------------                                         
      hereafter called the "Non-Competition Agreement".

      (a)   Executive agrees that for a period of 24 months after the
            termination of Executive's employment with the Bank, for whatever
            reason such employment may cease and whether for cause or without
            cause, Executive shall not directly or indirectly (whether as an
            officer, director, employee, partner, stockholder, creditor or
            agent, or representative of other persons or entities) (i) engage in
            the banking

                                      -9-
<PAGE>
 
            business generally or in any business in which the Bank has, as of
            the date of such termination engaged, in the Dallas Metroplex Area
            or within any area within a one hundred mile radius of the
            geographical center of Dallas, Texas or (ii) solicit clients of Bank
            or Bank's affiliates or solicit employees of Bank or Bank's
            affiliates to seek employment with any person or entity except the
            Bank and its affiliates, whether, in either case, such solicitation
            is made within or without the area described in this paragraph 8,
            except that this Non-Competition Agreement shall not be binding on
            Executive if the Bank shall have breached its obligations under this
            Agreement.

      (b)   Except in the event of the termination of Executive's employment
            with the Bank pursuant to the provisions of paragraph 5(a) or
            paragraph 5(b) of this Agreement, the Bank shall pay Executive
            during such period of non-competition (in addition to the
            consideration being received by Executive by reason of the Merger),
            (i) the sum of Nine Thousand Five Hundred and No/100 dollars
            ($9,500.00) for each full calendar month payable on the first day of
            each calendar commencing with the first calendar month of the period
            of non-competition and (ii) the Bank shall continue in effect, and
            provide to the Executive, the same or similar medical insurance and
            disability insurance as provided to the Executive immediately prior
            to such termination.

      (c)   Executive agrees that (i) this Non-Competition Agreement is
            entered into in connection with the sale to BOKF of the goodwill of
            the


                                     -10-
<PAGE>
 
            business of the Bank, (ii) Executive is receiving valuable
            consideration in the Merger for this Non-Competition Agreement,
            (iii) the restrictions imposed upon Executive by this Non-
            Competition Agreement are essential and necessary to ensure BOKF
            acquires the goodwill of the Bank, and (iv) all the restrictions
            (including particularly the time and geographical limitations) set
            forth in this Non-Competition Agreement are fair and reasonable.

      (d)   Executive agrees that any remedy at law for any breach of this
            Non-Competition Agreement would be inadequate and, in the event of
            any such breach, the Bank shall be entitled to both immediate and
            permanent injunctive relief to preclude any such breach (in addition
            to any remedies of law which the Bank may be entitled).

(9)   MISCELLANEOUS PROVISIONS.  The following miscellaneous provisions shall
      apply to this Agreement:

      (a)   All notices or advices required or permitted to be given by or
            pursuant to this Agreement, shall be given in writing.  All such
            notices and advices shall be (i) delivered personally, (ii)
            delivered by facsimile or delivered by U.S. Registered or Certified
            Mail, Return Receipt Requested mail, or (iii) delivered for
            overnight delivery by a nationally recognized overnight courier
            service.  Such notices and advices shall be deemed to have been
            given (i) the first business day following the date of delivery if
            delivered personally or by facsimile, (ii) on the third business day
            following the date of mailing if mailed by U.S. Registered or
            Certified Mail, Return Receipt Requested, or


                                     -11-
<PAGE>
 
            (iii) on the date of receipt if delivered for overnight delivery by
            a nationally recognized overnight courier service.  All such notices
            and advices and all other communications related to this Agreement
            shall be given as follows:

            If to the Bank:

                        BOK Financial Corporation
                        P.O. Box 2300
                        Tulsa, OK 74192
                        Attention: Stanley A. Lybarger
                        Telecopy No.: (918) 588-6888

                        and

                        First National Bank of Park Cities, National Association
                        6125 Hillcrest
                        P.O. Box 8380
                        Dallas, TX 75205
                        Attention:  Mr. Tom E. Turner
                        Telecopy No.: (214) 521-9072

                        With a Copy to:

                        Frederic Dorwart
                        Old City Hall
                        124 East Fourth Street
                        Tulsa, OK 74103-5010
                        Telecopy No.: (918) 583-8251

            If to Executive:

                        C. Thomas Abbott
                        6125 Hillcrest
                        P.O. Box 8380
                        Dallas, TX 75205
                        Telecopy No.: (214) 521-9072

                        With Copy To:

                        Jackson & Walker, L.L.P.
                        901 Main Street - Suite 6000
                        Dallas, TX 75202-3797
                        Attention: Dudley Chambers, Esq.
                        Telecopy No.: (214) 953-5822


                                     -12-
<PAGE>
 
            or to such other address as the party may have furnished to the
            other parties in accordance herewith, except that notice of change
            of addresses shall be effective only upon receipt.

      (b)   This Agreement is made and executed in Dallas County, Texas, and
            all actions or proceedings with respect to, arising directly or
            indirectly in connection with, out of, related to or from this
            Agreement, shall be litigated in courts having situs in Dallas,
            Dallas County, Texas.

      (c)   This Agreement shall be subject to, and interpreted by and in
            accordance with, the laws (excluding conflict of law provisions) of
            the State of Texas.

      (d)   This Agreement is the entire Agreement of the parties respecting
            the subject matter hereof.  There are no other agreements,
            representations or warranties, whether oral or written, respecting
            the subject matter hereof, except as stated in this Agreement.

      (e)   This Agreement, and all the provisions of this Agreement, shall
            be deemed drafted by all of the parties hereto.

      (f)   This Agreement shall not be interpreted strictly for or against
            any party, but solely in accordance with the fair meaning of the
            provisions hereof to effectuate the purposes and interest of this
            Agreement.

      (g)   Each party hereto has entered into this Agreement based solely
            upon the agreements, representations and warranties expressly set
            forth herein and upon his own knowledge and investigation. Neither
            party


                                     -13-
<PAGE>
 
            has relied upon any representation or warranty of any other party
            hereto except any such representations or warranties as are
            expressly set forth herein.

      (h)   Each of the persons signing below on behalf of a party hereto
            represents and warrants that he or she has full requisite power and
            authority to execute and deliver this Agreement on behalf of the
            parties for whom he or she is signing and to bind such party to the
            terms and conditions of this Agreement.

      (i)   This Agreement may be executed in counterparts, each of which
            shall be deemed an original.  This Agreement shall become effective
            only when all of the parties hereto shall have executed the original
            or counterpart hereof.  This Agreement may be executed and delivered
            by a facsimile transmission of a counterpart signature page hereof.

      (j)   In any action brought by a party hereto to enforce the
            obligations of any other party hereto, the prevailing party shall be
            entitled to collect from the opposing party to such action such
            party's reasonable litigation costs and attorneys fees and expenses
            (including court costs, reasonable fees of accountants and experts,
            and other expenses incidental to the litigation).

      (k)   This Agreement shall be binding upon and shall inure to the
            benefit of the parties and their respective successors and assigns.
            The Bank agrees that if it merges, consolidates or combines with any
            other business entity, it shall cause the succeeding or continuing


                                     -14-
<PAGE>
 
            corporation or business entity to expressly assume and confirm in
            writing the obligations of the Bank under this Agreement

      (l)   This is not a third party beneficiary contract, except BOKF
            (including each affiliate thereof) shall be a third party
            beneficiary of this Agreement. No person or entity other than a
            party signing this Agreement and those designated as a third party
            beneficiary herein shall have any rights under this Agreement.

      (m)   This Agreement may be amended or modified only in a writing which
            specifically references this Agreement.

      (n)   A party to this Agreement may decide or fail to require full or
            timely performance of any obligation arising under this Agreement.
            The decision or failure of a party hereto to require full or timely
            performance of any obligation arising under this Agreement (whether
            on a single occasion or on multiple occasions) shall not be deemed a
            waiver of any such obligation. No such decisions or failures shall
            give rise to any claim of estoppel, laches, course of dealing,
            amendment of this Agreement by course of dealing, or other defense
            of any nature to any obligation arising hereunder.

      (o)   In the event any provision of this Agreement, or the application
            of such provision to any person or set of circumstances, shall be
            determined to be invalid, unlawful, or unenforceable to any extent
            for any reason, the remainder of this Agreement, and the application
            of such provision to persons or circumstances other than those as to
            which it is determined to be invalid, unlawful, or unenforceable,
            shall


                                     -15-
<PAGE>
 
            not be affected and shall continue to be enforceable to the fullest
            extent permitted by law.

      Dated and effective the date first set forth above.


                               FIRST NATIONAL BANK OF PARK CITIES,
                                  NATIONAL ASSOCIATION


                               By
                                 ---------------------------------


                               -----------------------------------
                               C. Thomas Abbott



                                     -16-
<PAGE>
 
                                   EXHIBIT D
                                   ---------


                             EMPLOYMENT AGREEMENT
                             --------------------

      This Employment Agreement ("Agreement") is made, effective this ___ day of
______________, 1997 between First National Bank of Park Cities, a national
banking association (the "Bank") and Charles A. Angel, Jr., an individual
residing in Dallas, Texas (the "Executive").

      The Bank and Executive, in consideration of the promises and covenants set
forth herein (the receipt and adequacy of which is hereby acknowledged) and
intending to be legally bound hereby, agree as follows:

(1)   PURPOSE OF THIS AGREEMENT.  The purpose of this agreement is as follows:
      -------------------------                                               

      (a)   The Bank is a national association formed under and pursuant to
            the laws of the United States of America.  The Bank is engaged in
            the banking business in Dallas, Texas.

      (b)   The Executive is currently serving as the Vice-Chairman of the
            Board of the Bank. The Executive currently has no written agreement
            of employment with the Bank, but the Executive is currently
            receiving salary compensation and other benefits from the Bank
            (collectively, the "Current Benefits").

      (c)   Pursuant to an Agreement And Plan of Merger dated September ____,
            1996 (the "Merger Agreement"), among BOK Financial Corporation
            ("BOKF"), Park Cities Bancshares, Inc. ("Park Cities"), and BOKF
            Merger Corporation Number Five ("BOKSub"), BOKF is acquiring
            indirect ownership of the Bank (the "Merger").  Upon and subject to
            consummation of the Merger, the Bank desires to
<PAGE>
 
            retain the services of Executive and the Executive desires to
            continue to render services to the Bank.

      (d)   The purpose of this Agreement is to set forth the terms and
            conditions (i) on which the Bank shall, subject to consummation of
            the Merger, employ the Executive from and after consummation of the
            Merger and (ii) on which the Executive agrees not to compete with
            the Bank.

(2)   EMPLOYMENT.  The Bank hereby employs the Executive, and the Executive
      ----------                                                           
      hereby agrees to work for the Bank, on the following terms and conditions:

      (a)   Executive shall serve as Vice-Chairman of the Board of the Bank,
            subject to the direction of the Chairman of the Board of Directors
            of the Bank and of the Chief Executive Officer of BOKF; provided,
            that, in the event of a conflict between the directions being given
            by the Board of Directors of the Bank and the Chief Executive
            Officer of BOKF, the Executive shall act in accordance with the
            directions of the Board of Directors of the Bank.

      (b)   Executive shall devote his full time, attention and efforts,
            exclusively on behalf of the Bank.

      (c)   Executive shall devote all time and attention reasonably
            necessary to the affairs of the Bank and shall serve the Bank
            diligently, loyally, and to the best of his ability.

      (d)   Executive shall serve in such other or additional positions as an
            officer and/or director of the Bank as the Executive and Board of
            Directors of the Bank may mutually agree or of any affiliate of the


                                      -2-
<PAGE>
 
            Bank as Executive and the Chief Executive Officer of BOKF may
            mutually agree; provided, however, Executive's residence and place
            of work shall remain in Dallas, Texas.

      (e)   Notwithstanding anything herein to the contrary, Executive shall not
            be precluded from engaging in any charitable, civic, political or
            community activity or membership in any professional organization.

(3)   COMPENSATION.  As the sole, full and complete compensation to the
      ------------                                                     
      Executive for the performance of all duties of Executive under this
      Agreement and for all services rendered by Executive to the Bank or to any
      affiliate of the Bank:

      (a)   The Bank shall pay to Executive the sum of seventy-one thousand
            seven hundred and fifty dollars ($71,750) per year payable in
            installments in arrears, less usual and customary payroll deductions
            for FICA, federal and state withholding, and the like, at the times
            and in the manner in effect in accordance with the usual and
            customary payroll policies generally in effect from time to time at
            the Bank ("Annual Salary").

      (b)   The Bank shall pay and provide to Executive pension, thrift,
            medical insurance, disability insurance plan benefits, and other
            fringe benefits, generally in effect for senior executive employees
            of BOKF and its affiliates (the "Additional Benefits"). The pension
            benefits provided to BOKF employees are fully described in the
            official plan document but include a contribution initially equal to
            8.5% of pay. Executive shall be credited with his prior service at
            Park Cities and its affiliates in BOKF's 401k and in connection with
            the Additional


                                      -3-
<PAGE>
 
            Benefits, other than in connection with BOKF's pension plan.
            Executive shall not be credited with prior service in BOKF's pension
            plan, but shall (i) be able to participate in BOKF's pension plan
            immediately upon consummation of the Merger and (ii) in the event
            Executive is not vested at the time Executive's employment with the
            Bank is terminated (for whatever reason), Bank shall pay Executive
            an amount equal to pension plan contributions made by the Bank in
            respect of Executive.

      (c)   The Bank may, from time to time in Bank's sole discretion
            consistent with the practices generally in effect for senior
            executive employees of BOKF and its affiliates, pay or provide, or
            agree to pay or provide Executive a bonus, stock option, or other
            incentive or performance based compensation. All such bonus, stock
            option or other incentive or performance based compensation,
            regardless of its nature (hereinafter called "Performance
            Compensation") shall not constitute Annual Salary.

      (d)   The Bank shall reimburse Executive for reasonable and necessary
            entertainment, travel and other expenses in accordance with BOKF's
            standard policies in general effect for senior executive employees
            of BOKF affiliates (which includes dues for lunch clubs, but does
            not include reimbursement for country club memberships or dues).

      (e)   The Executive shall be allowed vacation, holidays, and other
            employee benefits not described above in accordance with the Bank's


                                      -4-
<PAGE>
 
            standard policy in general effect for Bank's senior executive
            employees.

      (f)   The Bank and Executive shall continue the Split Dollar Life
            Insurance Agreement (the "Split Dollar Agreement") dated April 20,
            1995 respecting the Policy as defined in said agreement, and in the
            event of a termination of this Agreement for whatever reason, with
            or without cause, Executive shall be entitled to have assigned to
            him the insurance policy which is the subject of such Split Dollar
            Agreement as provided in such agreement.

      (g)   The Executive shall be considered for the award of options
            pursuant to BOKF's 1997 stock option (not yet adopted) on the same
            basis as other senior executives of BOKF and its affiliates.

      (h)   So long as the Executive remains a member of the Board of
            Directors of the Bank, the Bank shall pay the Executive the same
            fees as are generally paid to other members of the Board of
            Directors of the Bank.

      (i)   Executive hereby agrees to accept the foregoing compensation in
            lieu of all Current Benefits and as the sole, full and complete
            compensation to Executive for the performance of all duties of
            Executive under this Agreement and for all services rendered by
            Executive to the Bank or any affiliate of the Bank.

(4)   TERM OF THIS AGREEMENT.  The term of this Agreement (the "Term") shall
      ----------------------                                                
      commence (the "Commencement") as of the commencement of the first pay-roll
      period


                                      -5-
<PAGE>
 
      immediately preceding the effective date of the Merger and shall terminate
      on the third anniversary date of the Commencement.

(5)   TERMINATION OF THIS AGREEMENT.  Notwithstanding the provisions of
      -----------------------------                                    
      paragraph 4 of this Agreement, this Agreement may be terminated on the
      following terms and conditions:

      (a)   Termination by Bank for Cause.  The Bank may terminate this
            -----------------------------                              
            Agreement for cause on the following terms and conditions:

            (i)  The Bank shall be deemed to have cause to terminate
                 Executive's employment only in one of the following events:

                 (A)   The Executive shall willfully fail to substantially
                       perform his obligations under this Agreement (it being
                       understood that any such failure resulting from
                       Executive's incapacity due to physical or mental illness
                       shall not be deemed willful);

                 (B)   Any act which is intended by Executive to materially
                       injure the Bank;

                 (C)   Any criminal act involving moral turpitude;


                                      -6-
<PAGE>
 
                 (D)   Any dishonest or fraudulent act; or,

                 (E)   Any refusal to obey written orders or instructions of
                       the Board of Directors of the Bank unless such
                       instructions would require Executive to commit an illegal
                       act, could subject Executive to personal liability, would
                       require Executive to violate the terms of this Agreement,
                       or would otherwise be inconsistent with the duties of an
                       officer of a national banking association.

            (ii) The Bank shall be deemed to have cause to terminate
                 Executive's employment only when a majority of the members of
                 the Board of Directors of the Bank finds that, in the good
                 faith opinion of such majority, the Executive committed any of
                 the acts set forth in clauses (A) through (E) of the preceding
                 subparagraph, such finding to have been made after at least
                 five (5) business days' notice to the Executive and an
                 opportunity for the Executive, together with his counsel, to be
                 heard before such


                                      -7-
<PAGE>
 
                 majority.  The determination of such majority, made as set
                 forth above, shall be binding upon the Bank and the Executive,
                 absent bad faith or willful misconduct.

           (iii) The effective date of a termination for cause shall be the
                 date of the action of such majority finding the termination was
                 with cause.  In the event the Bank terminates this Agreement
                 for cause, (A) the Bank shall pay Executive the Executive's
                 then Annual Salary through, but not beyond, the effective date
                 of the termination and (B) the Executive shall receive those
                 Benefits accrued through but not beyond the effective date of
                 such termination which are thereafter payable under the terms
                 and provisions of benefit plans then in effect in accordance
                 with paragraph 3(b) above.

      (b)   Termination By the Executive. The Executive may, at any time
            ----------------------------                                
            after the first anniversary date of the consummation of the Merger,
            terminate this Agreement on the following terms and conditions:

            (i)  The Executive may give written notice of termination to the
                 Bank.  The termination shall be effective on the fifteenth
                 (15th) business day following the notice of termination.



                                      -8-
<PAGE>
 
            (ii) Upon termination by the Executive, the Bank shall have no
                 obligation to Executive under this Agreement beyond the
                 effective date of the termination; provided, however, that the
                 Executive shall be entitled to receive any benefits, insured or
                 otherwise, that Executive would otherwise be able to receive
                 under any benefit plan of the Bank of which Executive is a
                 beneficiary in accordance with paragraph 3(b).

(6)   DEATH OF EXECUTIVE. In the event of Executive's death during the term of
      ------------------                                                      
      this Agreement, his estate, legal representatives, or named beneficiaries
      (as set forth in a writing by Executive delivered to the Bank prior to
      death) (i) shall be paid Executive's Annual Salary and Benefits for a
      period of six (6) months following the date of Executive's death and (ii)
      shall receive those benefits which are accrued through the date six (6)
      months after the date of Executive's death and which are thereafter
      payable under the terms and provisions of the benefit plans then in effect
      in accordance with paragraph 3(b) above.

(7)   PROVISIONS RESPECTING ILLNESS.  In the event Executive is unable to
      -----------------------------                                      
      perform his duties under this Agreement on a full-time basis for a period
      of six (6) consecutive months by reason of illness or other physical or
      mental disability, and at or before the end of such period, Executive does
      not return to work on a full-time basis, the Bank may terminate this
      Agreement without further or additional compensation being due the
      Executive from the Bank except annual salary and benefits accrued through
      the date of


                                      -9-
<PAGE>
 
      such termination under benefit plans then in effect in accordance with
      paragraph 3(b) above.

(8)   AGREEMENT NOT TO COMPETE.  The provisions of this paragraph 8 are
      ------------------------                                         
      hereafter called the "Non-Competition Agreement".

      (a)   Executive agrees that for a period of 18 months after the
            termination of Executive's employment with the Bank, for whatever
            reason such employment may cease and whether for cause or without
            cause, Executive shall not directly or indirectly (whether as an
            officer, director, employee, partner, stockholder, creditor or
            agent, or representative of other persons or entities) (i) engage in
            the banking business generally or in any business in which the Bank
            has, as of the date of such termination engaged, in the Dallas
            Metroplex Area or within any area within a one hundred mile radius
            of the geographical center of Dallas, Texas or (ii) solicit clients
            of Bank or Bank's affiliates or solicit employees of Bank or Bank's
            affiliates to seek employment with any person or entity except the
            Bank and its affiliates, whether, in either case, such solicitation
            is made within or without the area described in this paragraph 8,
            except that this Non-Competition Agreement shall not be binding on
            Executive if the Bank shall have breached its obligations under this
            Agreement.

      (b)   Except in the event of the termination of Executive's employment
            with the Bank pursuant to the provisions of paragraph 5(a) or
            paragraph 5(b) of this Agreement, the Bank shall pay Executive
            during such period of non-competition (in addition to the


                                     -10-
<PAGE>
 
            consideration being received by Executive by reason of the Merger),
            the sum of Nine Thousand Five Hundred and No/100 dollars ($9,500.00)
            for each full calendar month payable on the first day of each
            calendar commencing with the first calendar month of the period of
            non-competition and (ii) the Bank shall continue in effect, and
            provide to the Executive, the same or similar medical insurance and
            disability insurance as provided to the Executive immediately prior
            to such termination.

      (c)   Executive agrees that (i) this Non-Competition Agreement is
            entered into in connection with the sale to BOKF of the goodwill of
            the business of the Bank, (ii) Executive is receiving valuable
            consideration in the Merger for this Non-Competition Agreement,
            (iii) the restrictions imposed upon Executive by this Non-
            Competition Agreement are essential and necessary to ensure BOKF
            acquires the goodwill of the Bank, and (iv) all the restrictions
            (including particularly the time and geographical limitations) set
            forth in this Non-Competition Agreement are fair and reasonable.

      (d)   Executive agrees that any remedy at law for any breach of this
            Non-Competition Agreement would be inadequate and, in the event of
            any such breach, the Bank shall be entitled to both immediate and
            permanent injunctive relief to preclude any such breach (in addition
            to any remedies of law which the Bank may be entitled).

(9)   MISCELLANEOUS PROVISIONS.  The following miscellaneous provisions shall
      apply to this Agreement:


                                     -11-
<PAGE>
 
      (a)   All notices or advices required or permitted to be given by or
            pursuant to this Agreement, shall be given in writing. All such
            notices and advices shall be (i) delivered personally, (ii)
            delivered by facsimile or delivered by U.S. Registered or Certified
            Mail, Return Receipt Requested mail, or (iii) delivered for
            overnight delivery by a nationally recognized overnight courier
            service. Such notices and advices shall be deemed to have been given
            (i) the first business day following the date of delivery if
            delivered personally or by facsimile, (ii) on the third business day
            following the date of mailing if mailed by U.S. Registered or
            Certified Mail, Return Receipt Requested, or (iii) on the date of
            receipt if delivered for overnight delivery by a nationally
            recognized overnight courier service. All such notices and advices
            and all other communications related to this Agreement shall be
            given as follows:

            If to the Bank:

                        BOK Financial Corporation
                        P.O. Box 2300
                        Tulsa, OK 74192
                        Attention: Stanley A. Lybarger
                        Telecopy No.: (918) 588-6888

                        and

                        First National Bank of Park Cities, National Association
                        6125 Hillcrest
                        P.O. Box 8380
                        Dallas, TX 75205
                        Attention:  Mr. Tom E. Turner
                        Telecopy No.: (214) 521-9072


                                     -12-
<PAGE>
 
                        With a Copy to:

                        Frederic Dorwart
                        Old City Hall
                        124 East Fourth Street
                        Tulsa, OK 74103-5010
                        Telecopy No.: (918) 583-8251

            If to Executive:

                        Charles A. Angel, Jr.
                        6125 Hillcrest
                        P.O. Box 8380
                        Dallas, TX 75205
                        Telecopy No.: (214) 521-9072

                        With Copy To:

                        Jackson & Walker, L.L.P.
                        901 Main Street - Suite 6000
                        Dallas, TX 75202-3797
                        Attention: Dudley Chambers, Esq.
                        Telecopy No.: (214) 953-5822

            or to such other address as the party may have furnished to the
            other parties in accordance herewith, except that notice of change
            of addresses shall be effective only upon receipt.

      (b)   This Agreement is made and executed in Dallas County, Texas, and
            all actions or proceedings with respect to, arising directly or
            indirectly in connection with, out of, related to or from this
            Agreement, shall be litigated in courts having situs in Dallas,
            Dallas County, Texas.

      (c)   This Agreement shall be subject to, and interpreted by and in
            accordance with, the laws (excluding conflict of law provisions) of
            the State of Texas.


                                     -13-
<PAGE>
 
      (d)   This Agreement is the entire Agreement of the parties respecting the
            subject matter hereof.  There are no other agreements,
            representations or warranties, whether oral or written, respecting
            the subject matter hereof, except as stated in this Agreement.

      (e)   This Agreement, and all the provisions of this Agreement, shall
            be deemed drafted by all of the parties hereto.

      (f)   This Agreement shall not be interpreted strictly for or against
            any party, but solely in accordance with the fair meaning of the
            provisions hereof to effectuate the purposes and interest of this
            Agreement.

      (g)   Each party hereto has entered into this Agreement based solely
            upon the agreements, representations and warranties expressly set
            forth herein and upon his own knowledge and investigation. Neither
            party has relied upon any representation or warranty of any other
            party hereto except any such representations or warranties as are
            expressly set forth herein.

      (h)   Each of the persons signing below on behalf of a party hereto
            represents and warrants that he or she has full requisite power and
            authority to execute and deliver this Agreement on behalf of the
            parties for whom he or she is signing and to bind such party to the
            terms and conditions of this Agreement.

      (i)   This Agreement may be executed in counterparts, each of which
            shall be deemed an original.  This Agreement shall become effective
            only when all of the parties hereto shall have executed the original
            or


                                     -14-
<PAGE>
 
            counterpart hereof.  This Agreement may be executed and delivered by
            a facsimile transmission of a counterpart signature page hereof.

      (j)   In any action brought by a party hereto to enforce the
            obligations of any other party hereto, the prevailing party shall be
            entitled to collect from the opposing party to such action such
            party's reasonable litigation costs and attorneys fees and expenses
            (including court costs, reasonable fees of accountants and experts,
            and other expenses incidental to the litigation).

      (k)   This Agreement shall be binding upon and shall inure to the
            benefit of the parties and their respective successors and assigns.
            The Bank agrees that if it merges, consolidates or combines with any
            other business entity, it shall cause the succeeding or continuing
            corporate or business entity to expressly assume and confirm in
            writing the obligations of the Bank under this Agreement.

      (l)   This is not a third party beneficiary contract, except BOKF
            (including each affiliate thereof) shall be a third party
            beneficiary of this Agreement. No person or entity other than a
            party signing this Agreement and those designated as a third party
            beneficiary herein shall have any rights under this Agreement.

      (m)   This Agreement may be amended or modified only in a writing which
            specifically references this Agreement.

      (n)   A party to this Agreement may decide or fail to require full or
            timely performance of any obligation arising under this Agreement.
            The decision or failure of a party hereto to require full or timely


                                     -15-
<PAGE>
 
            performance of any obligation arising under this Agreement (whether
            on a single occasion or on multiple occasions) shall not be deemed a
            waiver of any such obligation. No such decisions or failures shall
            give rise to any claim of estoppel, laches, course of dealing,
            amendment of this Agreement by course of dealing, or other defense
            of any nature to any obligation arising hereunder.

      (o)   In the event any provision of this Agreement, or the application
            of such provision to any person or set of circumstances, shall be
            determined to be invalid, unlawful, or unenforceable to any extent
            for any reason, the remainder of this Agreement, and the application
            of such provision to persons or circumstances other than those as to
            which it is determined to be invalid, unlawful, or unenforceable,
            shall not be affected and shall continue to be enforceable to the
            fullest extent permitted by law.

      Dated and effective the date first set forth above.

                               FIRST NATIONAL BANK OF PARK CITIES,
                                  NATIONAL ASSOCIATION


                               By:
                                  --------------------------------


                               -----------------------------------
                               Charles A. Angel, Jr.


                                     -16-
<PAGE>
 
                                   EXHIBIT E
                                   ---------

                          FORM OF OPINION OF COUNSEL
                                FOR PARK CITIES



                              _____________, 1997



BOK Financial Corporation
BOKF Merger Corporation Number Five
P.O. Box 2300
Tulsa, Oklahoma 74103

Ladies and Gentlemen:

      We have acted as counsel for Park Cities Bancshares, Inc., a Texas
corporation ("Park Cities") in connection with the Agreement and Plan of Merger
(the "Plan of Merger") dated October ____, 1996 among BOK Financial Coporation
("BOKF"), BOKF Merger Corporation Number Five ("BOKSub") and Park Cities,
pursuant to which BOKSub will be merged with and into Park Cities and Park
Cities will become a wholly-owned subsidiary of BOKF (the "Merger").
Capitalized terms used herein and not otherwise defined shall have the meanings
attributed to such terms in the Plan of Merger.

      We have examined signed copies of the Plan of Merger and the other
agreements contemplated by the Plan of Merger and the original (or copies
identified to our satisfaction) of such corporate records of Park Cities, Park
Cities Corporation, a Nevada corporation ("PC Corporation") and First National
Bank of Park Cities, a national banking association ("FNB"), such other
agreements and instruments, certificates of public officials, officers of Park
Cities, PC Corporation, FNB and other persons, and such other documents
furnished to us by the directors and officers of Park Cities, PC Corporation and
FNB and made such examinations of applicable law as we deemed necessary as a
basis for the opinions hereinafter expressed.  In rendering such opinions, we
have relied, to the extent we deemed reasonable, on certificates and certain
other information provided to us by officers of Park Cities, PC Corporation, FNB
and public officials as to matters of fact of which the maker of such
certificates or the person providing such other information had knowledge.
Furthermore, in rendering such opinions we have assumed that the signatures on
all documents examined by us are genuine, that all documents submitted to us as
originals are accurate and complete, and that all documents submitted to us as
copies are true, correct and complete copies of the originals thereof.

      Based solely on the foregoing, subject to the exceptions hereinafter
stated, and limited in all respect to the laws of the State of Texas and the
United States of America, we are of the opinion that:

      1.  Park Cities is a corporation validly existing and in good standing
      under the laws of the State of Texas and has full corporate power and
      authority to carry on its business as presently conducted and to own its
      assets as now owned.  PC Corporation is a corporation validly existing and
      in good standing
<PAGE>
 
      under the laws of the State of Navada.  FNB is a validly existing national
      banking association.

      2.  Park Cities has the requisite corporate power and authority to
      execute, deliver and perform the Plan of Merger.

      3.  The execution, delivery and performance of the Plan of Merger by Park
      Cities has been duly authorized by all necessary corporate action on the
      part of Park Cities and the Plan of Merger has been duly executed and
      delivered by Park Cities and constitutes the valid and binding obligation
      of Park Cities, except as may be limited by bankruptcy, insolvency or
      other similar laws affecting creditors' rights generally or the
      availability of equitable remedies.

      5.  The execution, delivery and performance of the Plan of Merger by Park
      Cities, and of all instruments and documents executed and delivered
      pursuant thereto and the consummation of the transactions contemplated
      thereby, will not conflict with, or result in any breach, violation or
      default under, the Certificate or Articles of Incorporation or Bylaws of
      Park Cities, PC Corporation or FNB, or any judgment, decree, order or
      award known to us of any court, governmental agency or body or arbitrator
      binding on any of them.

      6.  All regulatory filings required to be made, and all regulatory
      approvals needed to be obtained, by Park Cities with respect to the
      consummation of the Merger have been made and obtained.

      7.    To our knowledge there is not any litigation, proceeding or
      governmental investigation pending or threatened against or relating to
      Park Cities, or against or relating to the transactions contemplated by
      the Plan of Merger which would have a material adverse affect on Park
      Cities or impair Park Cities' ability to perform its obligations under the
      Plan of Merger.

      This opinion is furnished by us solely pursuant to Section 9.3(a) of the
                                                         --------------       
Plan of Merger to you solely for your benefit.  Without our prior written
consent, this opinion may not be quoted in whole or in part or otherwise
referred to in any report or document or furnished to any other person or entity
except in response to a valid subpoena or other lawful process.

                                      Very truly yours,

                                      -2-
<PAGE>
 
                                   EXHIBIT F
                                   ---------

                          FORM OF OPINION OF COUNSEL
                              FOR BOKF AND BOKSUB



                              _____________, 1997



Park Cities Bancshares, Inc.
6215 Hillcrest
Dallas, Texas  75205

Ladies and Gentlemen:

      We have acted as counsel for BOK Financial Corporation, an Oklahoma
corporation ("BOKF"), and BOKF Merger Corporation Number Five, a Texas
corporation ("BOKSub"), in connection with the Agreement and Plan of Merger (the
"Plan of Merger") dated October ____, 1996 among BOKF, BOKSub, Park Cities
Bancshares, Inc., a Texas corporation ("Park Cities"), pursuant to which BOKSub
will be merged with and into Park Cities and Park Cities will become a wholly-
owned subsidiary of BOKF (the "Merger"), and (ii) the registration statement on
Form S-4 (Registration No. _______) relating to the BOKF Notes to be delivered
upon consummation of the Merger which was filed by BOKF with the Securities and
Exchange Commission ("Commission") under the Securities Act of 1993, as amended
(the "Securities Act") on ________________, 1996 and became effective on
____________, 1996 (such registration statement, including all exhibits thereto,
is herein called the "Registration Statement" and the related final
prospectus/proxy statement dated ______________, 1996 first filed with the
Commission pursuant to Rule 424(b) under the Securities Act is herein called the
"Prospectus/Proxy Statement").  Capitalized terms used herein and not otherwise
defined shall have the meanings attributed to such terms in the Plan of Merger.

      We have examined signed copies of the Plan of Merger, BOKF Notes, [if
required, the Indenture] and the other agreements contemplated by the Plan of
Merger and the original (or copies identified to our satisfaction) of such
corporate records of BOKF, such other agreements and instruments, certificates
of public officials, officers of BOKF and other persons, and such other
documents furnished to us by the directors and officers of BOKF, and made such
examinations of applicable law as we deemed necessary as a basis for the
opinions hereinafter expressed.  In rendering such opinions, we have relied, to
the extent we deemed reasonable, on certificates and certain other information
provided to us by officers of BOKF and public officials as to matters of fact of
which the maker of such certificates or the person providing such other
information had knowledge.  Furthermore, in rendering such opinions we have
assumed that the signatures on all documents examined by us are genuine, that
all documents submitted to us as originals are accurate and complete, and that
all documents submitted to us as copies are true, correct and complete copies of
the originals thereof.

      Based solely on the foregoing, subject to the exceptions hereinafter
stated, and limited in all respect to the laws of the State of Oklahoma and the
United States of America, and the corporate laws of the State of Texas, we are
of the opinion that:
<PAGE>
 
      1. BOKF is a corporation validly existing and in good standing under the
      laws of the State of Oklahoma and has full corporate power and authority
      to carry on its business as presently conducted and to own its assets as
      now owned. BOKSub is a corporation validly existing and in good standing
      under the laws of the State of Texas.

      2. BOKF has the requisite corporate power and authority to execute,
      deliver and perform the Plan of Merger, the BOKF Notes and the other
      agreements executed and delivered by BOKF as contemplated by the Plan of
      Merger.

      3. BOKSub has the requisite corporate power and authority to execute,
      deliver and perform the Plan of Merger.

      4. The execution, delivery and performance of the Plan of Merger and the
      other agreements contemplated thereby by BOKF and BOKSub, as applicable,
      have been duly authorized by all necessary corporate action on the part of
      BOKF and BOKSub and the Plan of Merger and such other agreements have been
      duly executed and delivered by BOKF and BOKSub, as applicable, and
      constitute valid and binding obligations of BOKF and BOKSub, except as may
      be limited by bankruptcy, insolvency or other similar laws affecting
      creditors' rights generally or the availability of equitable remedies.

      5. The execution, delivery and performance of the Plan of Merger by BOKF
      and BOKSub, and of all instruments and documents executed and delivered
      pursuant thereto, including without limitation the BOKF Notes, the
      Indenture and the consummation of the transactions contemplated thereby,
      will not conflict with, or result in any breach, violation or default
      under, the Certificate or Articles of Incorporation or Bylaws of BOKF or
      BOKSub, or any judgment, decree, order or award known to us of any court,
      governmental agency or body or arbitrator binding on any of them.

      6. All regulatory filings required to be made, and all regulatory
      approvals needed to be obtained, by BOKF or BOKSub with respect to the
      consummation of the Merger and issuance and delivery of the BOKF Notes
      have been made and obtained.

      7. To our knowledge there is not any litigation, proceeding or
      governmental investigation pending or threatened against or relating to
      BOKF or BOKSub, or against or relating to the transactions contemplated by
      the Plan of Merger Agreement which would have a material adverse affect on
      BOKF or BOKSub or impair BOKF or BOKSub's ability to perform its
      obligations under the Plan of Merger.

      8. The Registration Statement has become effective under the Securities
      Act and, to our knowledge, no stop order suspending the effectiveness of
      the registration statement has been issued and no proceedings for that
      purpose have been instituted and are pending.

      9. [If required, the Indenture has been duly authorized, qualified under
      the Trust indenture Act, executed and delivered by BOKF] or [the issuance
      of the BOKF Notes are exempt from the Trust Indenture Act]; the BOKF Notes
      have been duly authorized, executed, issued and delivered by BOKF; [if
      required, and the Indenture] and the BOKF Notes constitute the valid and
      legally binding


                                      -2-
<PAGE>
 
      obligations of BOKF enforceable in accordance with their respective terms,
      except as may be limited by bankruptcy, insolvency or other similar laws
      affecting creditors' rights generally or the availability of equitable
      remedies.

      10. The Registration Statement and the Prospectus/Proxy Statement and each
      amendment or supplement thereto (except for (i) the financial statements
      and schedules contained therein (including the notes thereto and the
      auditors' report thereon) and (ii) the exhibits thereto, as to which we
      have not been asked to comment) appear on their face to comply as to form
      in all material respects with the requirements of Form S-4 and the
      applicable rules and regulations with respect thereto under the Securities
      Act [if required, and the Trust Indenture Act].

      11. We have participated in conferences with officers and other
      representatives of BOKF and BOKSub and the independent public accountants
      retained by BOKF, at which the contents of the Registration Statement and
      the Prospectus/Proxy Statement and related matters were discussed.
      Although we are not passing upon and do not assume any responsibility for
      the accuracy, completeness or fairness of the statements contained in the
      Registration Statement and the Prospectus/Proxy Statement, we advise you
      that, on the basis of the foregoing no facts have come to our attention
      which leads us to believe that either the Registration Statement or the
      Prospectus/Proxy Statement (other than (i) the financial statements and
      schedules contained therein (including the notes thereto and the auditors'
      report thereon), and (ii) information relating to Park Cities, PC
      Corporation or FNB, as to which we have not been asked to comment), at the
      time the Registration Statement became effective, contained an untrue
      statement of material fact or omitted to state a material fact required to
      be stated or necessary to make the statements therein not misleading, or
      that the Prospectus/Proxy Statement (other than as aforesaid) as amended
      or supplemented contains an untrue statement of a material fact or omits
      to state a material fact required to be stated therein or necessary to
      make the statements therein, in light of the circumstances in which they
      were made, not misleading.

     This opinion is furnished by us solely pursuant to Section 9.3(b) of the
                                                        --------------       
Plan of Merger to you solely for your benefit.  Without our prior written
consent, this opinion may not be quoted in whole or in part or otherwise
referred to in any report or document or furnished to any other person or entity
except in response to a valid subpoena or other lawful process.

                              Very truly yours,



                                      -3-

<PAGE>
 
                                 EXHIBIT 23.1

           Consent of Independent Auditors - Ernst & Young, LLP.



                                                              Page ____ of ____.



                                    - 20 -
<PAGE>
 
                        CONSENT OF INDEPENDENT AUDITORS
                        -------------------------------

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-4) and related Prospectus of BOK Financial
Corporation for the registration of up to $51,978,000 principal amount of
promissory notes and to the incorporation by reference therein of our report
dated January 29, 1996, with respect to the consolidated financial statements of
BOK Financial Corporation incorporated by reference in its Annual Report (Form
10-K) for the year ended December 31, 1995, filed with the Securities and
Exchange Commission.





November 14, 1996
Tulsa, Oklahoma




                                                              Page ____ of ____.



                                     - 21 -

<PAGE>
 
                                 EXHIBIT 23.2

           Consent of Independent Auditors - Coopers & Lybrand, L.L.P.



                                                              Page ____ of ____.



                                     - 22 -
<PAGE>
 
                        CONSENT OF INDEPENDENT AUDITORS
                        -------------------------------

We consent to the inclusion in this registration statement on Form S-4 of our 
report dated March 8, 1996, on our audits of the financial statements of Park 
Cities Bancshares, Inc.  We also consent to the reference to our firm under the 
caption "Experts."




/s/ Coopers & Lybrand L.L.P.

November 15, 1996
Dallas, Texas





                                                              Page ____ of ____.

                                    - 23 -


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