LAB HOLDINGS INC
8-K, 1999-03-08
MEDICAL LABORATORIES
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549

                                 _______________


                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



         Date of report (Date of earliest event reported) March 7, 1999


                               Lab Holdings, Inc.
             (Exact Name of Registrant as Specified in its Charter)

 
        MISSOURI                          0-16946              43-1039532
(State or  Other Jurisdiction          (Commission           (IRS Employer
       of Incorporation)               File Number)       Identification No.)
 




5000 W. 95TH ST., SUITE 260                                           66207
(Address of Principal Executive Offices)                           (Zip Code)


        Registrant's telephone number, including area code (913) 648-3600













<PAGE>

Item 5. Other Events.

     On  March 7,  1999,  Lab  Holdings,  Inc.,  a  Missouri  corporation  ("Lab
Holdings"), and LabOne, Inc., a Delaware corporation ("LabOne"),  issued a joint
press release respecting a definitive agreement to merge the two companies.

The text of the release is as follows:

"FOR IMMEDIATE RELEASE:

"March 7, 1999

"Contacts:        Lab Holdings, Inc.            LabOne, Inc.
                  (913) 648-3600                913-888-1770
                  Steve Fitzwater               Robert D. Thompson, ext. 1244
                  Linda McCoy                   Kurt E. Gruenbacher, ext 1445
                  NASDAQ Symbol:LABH            NASDAQ Symbol: LABS

                     "LAB HOLDINGS AND LABONE AGREE TO MERGE
                               JOINT PRESS RELEASE

     "Shawnee Mission, Ks - P. Anthony Jacobs, the President and Chief Executive
Officer of Lab Holdings,  Inc. and W.T. Grant,  II, the Chairman,  President and
Chief Executive Officer of LabOne,  Inc. jointly announced today that the Boards
of  Directors  of both  companies  have  approved an  agreement to merge the two
companies.

     "Representatives  of Lab  Holdings  negotiated  the  merger  with a Special
Committee of independent  directors of LabOne that was  established to represent
the interests of the holders of the 19.5% of common stock of LabOne not owned by
Lab Holdings.  The Special  Committee,  which had the  assistance of independent
legal and financial advisors, also approved the merger agreement and recommended
its approval by the LabOne board and stockholders.

     "Under the merger  agreement  LabOne is to be merged into Lab  Holdings but
the survivor's name will be changed to "LabOne, Inc." Management of the survivor
will consist of the present  LabOne  management  and the  survivor's  board will
consist of nine of the present eleven member LabOne Board.  Two new  independent
directors  selected by Lab Holdings and the Special  Committee  will replace two
positions now held by members of management so that a majority of the board will
consist of independent directors.

     "Stockholders  of Lab Holdings  will have their Lab  Holdings  shares split
immediately before the merger into 1.50 shares of the survivor.  Stockholders of
LabOne, other than Lab Holdings, will be entitled to elect to have each of their
existing LabOne

                                        2

<PAGE>

shares  exchanged  for  one  share of   the  survivor  or  $12.75 in  cash or  a
combination of cash and shares.  However,  if the cash election  shares exceed a
cash limit of $16.6 million (approximately 50% of eligible shares) then the cash
will be allocated on a pro rata basis among the cash election shares.

     "If all elections are for stock elections,  it is expected that immediately
after the merger  stockholders of Lab Holdings will own  approximately  78.9% of
the  survivor  and  holders  of  LabOne,  other  than  Lab  Holdings,  will  own
approximately 21.1% of the survivor.

     "'Mr. Jacobs said: "The consolidation of these two companies is designed to
position  LabOne so that it may  continue  its  growth  both  internally  and by
acquisition as it implements LabOne's diversification  strategy. This will allow
our Lab Holdings  stockholders  to enjoy the benefits of a direct  investment in
LabOne and its excellent  management team while  eliminating  duplicate  holding
company management and administrative costs."

     "'The change from being a subsidiary of a parent  company to an independent
entity will enable us to consider a number of transactions to enhance our growth
that are not feasible in the existing structure," said Mr. Grant. "It also comes
at the right time as we have moved into new and larger  facilities  that provide
us with the ability to handle larger volumes of testing services."

     "The merger is expected to close in June or July following the satisfaction
of a number of closing  conditions.  These  include  approval  by the holders of
two-thirds of the  outstanding  Lab Holdings shares and a majority of the shares
voted by  LabOne  stockholders  other  than  Lab  Holdings  and its  affiliates.
Financing must also be obtained  sufficient to satisfy cash elections  after the
use of available cash of LabOne and Lab Holdings.  Shareholder  meetings to vote
on the proposed  merger will be scheduled  as soon as a  registration  statement
becomes  effective with the SEC and proxy materials are finalized.  Lab Holdings
expects to file the registration statement in April.

     "LabOne  provides  laboratory  testing  services on a world-wide  basis for
insurance risk appraisal,  clinical use in the health care industry and employee
screening for substance abuse. Lab Holdings owns  approximately  80.5% of LabOne
and was  formerly  known  as  Seafield  Capital  Corporation  prior  to its 1997
distributions  of SLH  Corporation  (now known as  Syntroleum  Corporation)  and
Response Oncology, Inc.

     "THE OFFERING OF LAB HOLDINGS  COMMON STOCK IN  CONNECTION  WITH THE MERGER
WILL ONLY BE MADE BY MEANS OF A PROSPECTUS.  ACCORDINGLY,  THIS PRESS RELEASE IS
NOT INTENDED TO CONSTITUTE AN OFFER TO SELL OR THE  SOLICITATION  OF AN OFFER TO
BUY ANY SUCH SECURITIES.

                                        3

<PAGE>

                              *********************

     "This  release  contains  forward-looking  statements as well as historical
information. Forward-looking statements are identified by or are associated with
such words as "intend," "believe," "estimate," "expect," "anticipate," "should,"
"hopeful"  and  similar  expressions.  They  reflect  management's  beliefs  and
estimates of future  economic  circumstances  and industry  conditions,  Company
performance and financial results and are not guarantees of future  performance.
In  particular,  all  statements  relating  to the  merger,  its effects and the
anticipated  date of closing are based on  estimates  and no  assurances  can be
given  that  all  closing  conditions  will  occur or that  the  merger  will be
accomplished on the terms  described in this release.  Although Lab Holdings and
LabOne believe that the expectations reflected in any forward-looking statements
are reasonable,  they can give no assurance that such  expectations will be met.
These and other  forward-looking  statements are based on many  assumptions  and
factors,  all of which may not be detailed in this  release.  Any changes in the
assumptions  or factors could produce  materially  different  results than those
predicted and could impact stock values. For additional  information relative to
forward  looking  statements  and  risks  associated  with the  business  of Lab
Holdings and LabOne,  see the Lab Holdings Form 8-K dated October 23, 1998,  and
the LabOne Form 8-K dated October 22, 1998, both of which may be obtained on the
internet at the SEC's EDGAR archive at http://www.sec.gov/cgi-bin/srch-edgar.


                                    




















                                        4

<PAGE>

Item 7.  Financial Statements, Pro Forma Financial Statements and Exhibits

        (c)  Exhibits

              2     Agreement and Plan of Merger by and between Lab Holdings and
LabOne dated  March  7, 1999  (without  exhibits,  a  copy of which Lab Holdings
will furnish to the SEC upon request).


                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, Lab
Holdings  has  duly  caused  this  report  to be  signed  on its  behalf  by the
undersigned hereunto duly authorized.

                                           LAB HOLDINGS, INC.

Date: March 7, 1999                By: /s/ Steven K. Fitzwater

                                           Steven K. Fitzwater
                                           Exec. Vice President, Chief Operating
                                           and Financial Officer and
                                           Secretary




















                                        5

<PAGE>















                          AGREEMENT AND PLAN OF MERGER

                                 BY AND BETWEEN

                               LAB HOLDINGS, INC.

                                       AND

                                  LabOne, INC.

                               DATED MARCH 7, 1999






























<PAGE>
                                TABLE OF CONTENTS

                                                                          Page

AGREEMENT AND PLAN OF MERGER.................................................1

CERTAIN DEFINITIONS..........................................................2

ARTICLE I....................................................................2

         THE MERGER
          ...................................................................2
                  1.1      The Merger; Effective Time of the Merger..........2
                  1.2      Closing...........................................3

ARTICLE II

         EFFECT OF THE MERGER
          ...................................................................3
                  2.1      Effects of the Merger.............................3
                           (a)      Surviving Corporation....................3
                           (b)      Articles of Incorporation................3
                           (c)      Bylaws...................................3
                           (d)      Directors and Officers...................3
                           (e)      Other....................................4
                  2.2      Effect of the Merger on Capital Stock.............4
                           (a)      LabOne Common Stock .....................4
                           (b)      Exchange of LabOne Certificates..........6
                           (c)      LabOne shares held by Holdings and 
                                    LabOne...................................8
                           (d)      Holdings Common Stock....................8
                           (e)      Assumption of LabOne Stock Options.......8
                           (f)      Adjustment of Holdings Stock Options.....9
                           (g)      Stated Capital...........................9
                  2.3      Dissenting Shares.................................9
                  2.4      No Liability.....................................10

ARTICLE III

         REPRESENTATIONS AND WARRANTIES.....................................10
                  3.1      Representations and Warranties of LabOne.........10
                           (a)      Organization, Standing and Power........11
                           (b)      Capital Structure.......................12
                           (c)      Non-Subsidiaries Equity Investment......12
                           (d)      Authority; No Violations; Consents and 
                                    Approvals...............................12
                           (e)      SEC Documents...........................14
                           (f)      Information Supplied....................15
                           (g)      Absence of Certain Changes or Events....15


                                        i

<PAGE>
                           (h)      No Undisclosed Material Liabilities.....16
                           (i)      Material Contracts; No Defaults.........16
                           (j)      Compliance with Applicable Laws.........17
                           (k)      Litigation..............................17
                           (l)      Taxes...................................17
                           (m)      Pension and Benefit Plans; ERISA........19
                           (n)      Labor Matters...........................22
                           (o)      Intangible Property.....................22
                           (p)      Environmental Matters...................23
                           (q)      Opinion of Financial Advisor............25
                           (r)      Vote Required...........................26
                           (s)      Insurance...............................26
                           (t)      Brokers.................................26
                           (u)      Title...................................26
                           (v)      Books and Records.......................26
                           (w)      Certain Payments........................27
                           (x)      Transactions with Related Parties.......27
                           (y)      State Takeover Laws.....................27
                           (z)      Nature of Election by Certain 
                                    Affiliates..............................27
                  3.2      Representations and Warranties of Holdings.......27
                           (a)      Organization, Standing and Power........28
                           (b)      Capital Structure.......................28
                           (c)      Non-Subsidiaries Equity Investment......29
                           (d)      Authority; No Violations; Consents and
                                    Approvals...............................29
                           (e)      SEC Documents...........................31
                           (f)      Information Supplied....................32
                           (g)      Absence of Certain Changes or Events....32
                           (h)      No Undisclosed Material Liabilities.....33
                           (i)      Material Contracts; No Defaults.........33
                           (j)      Compliance with Applicable Laws.........34
                           (k)      Litigation..............................34
                           (l)      Taxes...................................34
                           (m)      Pension and Benefit Plans; ERISA........36
                           (n)      Labor Matters...........................38
                           (o)      Intangible Property.....................39
                           (p)      Environmental Matters...................40
                           (q)      Opinion of Financial Advisor............41
                           (r)      Vote Required...........................41
                           (s)      Insurance...............................41
                           (t)      Brokers.................................41
                           (u)      Title...................................41
                           (v)      Books and Records.......................42
                           (w)      Certain Payments........................42
                           (x)      Transactions with Related Parties.......42
                           (y)      State Takeover Laws.....................42
                           (z)      Nature of Election by Certain 
                                    Affiliates..............................43



                                       ii

<PAGE>
ARTICLE IV

         COVENANTS RELATING TO CONDUCT OF BUSINESS..........................43
                  4.1      Conduct of Business by LabOne Pending the 
                           Merger...........................................43
                           (a)      Ordinary Course.........................43
                           (b)      Dividends; Changes in Stock.............43
                           (c)      Issuance of Securities................. 44
                           (d)      Governing Documents.....................44
                           (e)      No Acquisitions.........................44
                           (f)      No Dispositions.........................44
                           (g)      No Dissolution, Etc.....................44
                           (h)      Certain Employee Matters................44
                           (i)      Indebtedness; Leases; Capital 
                                    Expenditures............................45
                           (j)      No Solicitation.........................45
                           (k)      Pooling.................................46
                  4.2      Conduct of Business by Holdings Pending the 
                           Merger...........................................46
                           (a)      Ordinary Course.........................46
                           (b)      Dividends; Changes in Stock.............47
                           (c)      Issuance of Securities..................47
                           (d)      Governing Documents.....................47
                           (e)      No Acquisitions.........................47
                           (f)      No Dispositions.........................47
                           (g)      No Dissolution, Etc.....................48
                           (h)      Certain Employee Matters................48
                           (i)      Indebtedness; Leases; Capital 
                                    Expenditures............................48
                           (j)      No Solicitation.........................48
                           (k)      Pooling.................................49
                           (l)      Stock Split.............................49

ARTICLE V

         ADDITIONAL AGREEMENTS..............................................51
                  5.1      Preparation of S-4 and the Proxy Statement.......52
                  5.2      Letter of LabOne's Accountants...................52
                  5.3      Letter of Holdings's Accountants.................52
                  5.4      Access to Information............................52
                  5.5      Stockholders Meetings............................52
                  5.6      Legal Conditions to Merger.......................53
                  5.7      Agreements of Others.............................53
                  5.8      Listing..........................................53
                  5.9      Board of Directors and Officers..................54
                  5.10     Assumption of Plans and Agreements; Stock Options;
                           Reservation and Registration of Shares...........54
                  5.11     Indemnification; Directors' and Officers'
                           Insurance........................................55
                  5.12     Public Announcements.............................57
                  5.13     Other Actions....................................57
                  5.14     Advice of Changes; SEC Filings...................58


                                       iii

<PAGE>
                  5.15     Tax-Free Transaction.............................58
                  5.16     Employment Agreements............................58

ARTICLE VI
         CONDITIONS PRECEDENT...............................................58
                  6.1      Conditions to Each Party's Obligation to Effect 
                           the Merger.......................................58
                           (a)      Stockholder Approval....................58
                           (b)      Listing.................................59
                           (c)      Other Approvals.........................59
                           (d)      S-4.....................................59
                           (e)      No Injunctions or Restraints............59
                           (f)      Dissenters..............................59
                           (g)      Tax Opinion.............................60
                           (h)      Stock Split.............................60
                  6.2      Conditions of Obligations of Holdings............60
                           (a)      Representations and Warranties..........60
                           (b)      Performance of Obligations of LabOne....60
                           (c)      No Vesting of LabOne Stock Options......60
                           (d)      Employment Agreements...................60
                           (e)      Fairness Opinion........................61
                           (f)      Officers' Certificate...................61
                           (g)      Letters from Affiliates.................61
                           (h)      Financing...............................61
                  6.3      Conditions of Obligations of LabOne..............61
                           (a)      Representations and Warranties..........61
                           (b)      Performance of Obligations of Holdings..61
                           (c)      Fairness Opinion........................62
                           (d)      Officers' Certificate...................62
                           (e)      Board of Directors and Officers at the 
                                    Effective Time..........................62
                           (f)        Financing.............................62
ARTICLE VII
TERMINATION AND AMENDMENT...................................................62
                  7.1      Termination......................................62
                  7.2      Effect of Termination............................64
                  7.3      Amendment........................................65
                  7.4      Extension; Waiver................................65

ARTICLE VIII

         GENERAL PROVISIONS.................................................65
                  8.1      Payment of Expenses..............................65
                  8.2      Nonsurvival of Representations, Warranties
                           and Agreements...................................66
                  8.3      Notices..........................................66
                  8.4      Interpretation...................................67
                  8.5      Counterparts.....................................68
                  8.6      Entire Agreement; No Third Party Beneficiaries...68


                                       iv

<PAGE>
                  8.7      Governing Law....................................68
                  8.8      Severability.....................................68
                  8.9      Assignment.......................................68


















































                                        v

<PAGE>
                  EXHIBITS TO THE AGREEMENT AND PLAN OF MERGER


Exhibit                    Description
- -------                    -----------

Exhibit A-1       --Form of Certificate of Merger
Exhibit A-2       --Form of Articles of Merger
Exhibit B         --Amended Articles of Incorporation
Exhibit C         --mended Bylaws
Exhibit D         --List of Directors and Officers of Surviving Corporation
Exhibit E         --Articles Amendment


GLOSSARY OF DEFINED TERMS

Defined Term                                                Defined in Section
- ------------                                                ------------------

Affiliates.................................................................5.7
Agreement.............................................................Preamble
Amended Articles of Incorporation.......................................2.1(b)
Amended Bylaws..........................................................2.1(c)
Articles Amendment ..................................................3.2(d)(i)
Articles of Merger.........................................................1.1
Cash Election.......................................................2.2(a)(ii)
Cash Election Shares...............................................2.2(a)(iii)
Cash Fraction.....................................................2.2(a)(v)(A)
Cash Price Per Share..................................................Recitals
CERCLA...............................................................3.1(p)(A)
Certificate of Merger......................................................1.1
Closing....................................................................1.1
Closing Date...............................................................1.2
Code..................................................................Recitals
Constituent Corporations................................................2.1(a)
Delaware Law......................................................... Recitals
Disbursing Agent........................................................2.2(b)
Dissenting Shares.......................................................2.1(c)
Distribution Agent................................................ 4.2(d)(iii)
Distribution Fund .................................................4.2(d)(iii)
Effective Time.............................................................1.1
Environmental Law....................................................3.1(p)(A)
ERISA.............................................................3.1(m)(i)(l)
Excess Shares......................................................4.2(l)(iii)
Exchange Act............................................................3.1(b)
Existing Articles of Incorporation......................................2.1(b)
Existing Bylaws.........................................................2.1(c)
Form of Election...................................................2.2(a)(iii)
GAAP....................................................................3.1(e)


                                       vi

<PAGE>
Governmental Entity................................................3.1(d)(iii)
Hazardous Material...................................................3.1(p)(B)
Holdings..............................................................Preamble
Holdings Acquisition Proposal...........................................4.2(j)
Holdings Benefit Programs.........................................3.2(m)(i)(2)
Holdings Common Stock.................................................Recitals
Holdings Common Stock Trust.........................................4.2(d)(iv)
Holdings Commonly Controlled Equity..............................3.2(m)(ii)(8)
Holdings Intangible Property............................................3.2(o)
Holdings Letter.........................................................3.2(a)
Holdings Litigation.....................................................3.2(k)
Holdings Material Adverse Change........................................3.2(a)
Holdings Material Adverse Effect........................................3.2(a)
Holdings Order..........................................................3.2(k)
Holdings Permits........................................................3.2(j)
Holdings Plans....................................................3.2(m)(i)(1)
Holdings Representatives................................................4.2(j)
Holdings Preferred Stock................................................3.2(b)
Holdings SEC Documents..................................................3.2(e)
Holdings Stock Option...................................................2.2(e)
Holdings Stock Option Plan..............................................2.2(c)
Holdings Stockholder Meeting...............................................5.5
Holdings Voting Debt....................................................3.2(b)
Indemnified Liabilities...................................................5.11
Indemnified Parties.......................................................5.11
Injunction..............................................................6.1(e)
IRS..............................................................3.1(m)(ii)(5)
LabOne................................................................Preamble
LabOne Acquisition Proposal.............................................4.1(j)
LabOne Benefit Programs...........................................3.1(m)(i)(2)
LabOne Certificates.................................................2.2(a)(ii)
LabOne Common Stock...................................................Recitals
LabOne Commonly Controlled Entity................................3.1(m)(ii)(8)
LabOne Intangible Property..............................................3.1(o)
LabOne Letter...........................................................3.1(a)
LabOne Litigation.......................................................3.1(k)
LabOne Material Adverse Change..........................................3.1(a)
LabOne Material Adverse Effect..........................................3.1(a)
LabOne Order............................................................3.1(k)
LabOne Permits..........................................................3.1(j)
LabOne Plans......................................................3.1(m)(i)(1)
LabOne Preferred Stock..................................................3.1(b)
LabOne Representatives .................................................4.1(j)
LabOne SEC Documents....................................................3.1(e)
LabOne Stock Option.......................................................5.10
LabOne Stock Option Plans...............................................3.1(b)
LabOne Stockholder Meeting.................................................5.5


                                       vii

<PAGE>
LabOne Voting Debt......................................................3.1(b)
Letter of Transmittal...............................................2.2(b)(ii)
Maximum Cash Payment Amount........................................2.2(a)(iii)
Merger................................................................Recitals
Merger Consideration.................................................2.2(a)(i)
Missouri Law...............................................................1.1
Non-Election........................................................2.2(a)(ii)
Partial Cash Election..............................................2.2(a)(iii)
Partial Stock Election.............................................2.2(a)(iii)
OSHA.................................................................3.1(p)(A)
PBGC.............................................................3.1(m)(ii)(5)
Proxy Statement.........................................................3.1(f)
Related Person..........................................................3.1(x)
Release..............................................................3.1(p)(C)
Remedial Action......................................................3.1(p)(D)
Returns..............................................................3.1(l)(i)
S-4.....................................................................3.1(f)
SEC.....................................................................2.1(d)
Securities Act..........................................................3.1(f)
SLH Tax Sharing Agreement...........................................3.2(l)(iv)
Special Committee.....................................................Recitals
Stock Election.....................................................2.2(a)(iii)
Stock Election Shares..............................................2.2(a)(iii)
Stockholder Meetings.......................................................5.5
Stock Split.............................................................3.2(g)
Subsidiary or Subsidiaries..............................................3.1(a)
Surviving Corporation...................................................2.1(a)
Surviving Corporation Common Stock....................................Recitals
Surviving Corporation Material Adverse Effect...........................6.1(c)
Taxes...................................................................3.1(l)
Tax Sharing Agreement...............................................3.1(l)(iv)
Transfer Agent...................................................... 2.2(a)(i)
Unaffiliated LabOne Stockholders........................................3.1(q)
Warrant.................................................................3.1(b)























                                      viii

<PAGE>
                          AGREEMENT AND PLAN OF MERGER

         AGREEMENT AND PLAN OF MERGER, dated March 7, 1999 (the
"Agreement"),  by  and  between  Lab  Holdings,  Inc.,  a  Missouri  corporation
("Holdings"), and LabOne, Inc., a Delaware corporation ("LabOne").

         WHEREAS,  (i) the Board of  Directors of LabOne  established  a special
committee of independent directors (the "Special Committee") to represent solely
the interests of LabOne and the Unaffiliated  LabOne Stockholders (as defined in
Section  3.1 (q))  with  respect  to any  merger or other  acquisition  proposal
concerning  LabOne,  (ii) the Special  Committee is  authorized  to exercise all
lawfully  delegable  powers of the LabOne Board of Directors with respect to any
such merger or  acquisition  proposal and pursuant  thereto has  negotiated  the
terms and conditions of the Agreement  with the assistance of independent  legal
and  financial  advisers to the  Special  Committee,  (iii) the LabOne  Board of
Directors is required by Section 252 of the  Delaware  General  Corporation  Law
("Delaware  Law") to adopt and approve a resolution  approving the Agreement and
has done so in accordance with a recommendation by the Special Committee;

         WHEREAS, the Special Committee has determined that it is in furtherance
of and consistent with the long-term  business  strategies of LabOne and is fair
to and in the best interests of the Unaffiliated  LabOne Stockholders for LabOne
to merge with and into Holdings upon the terms and subject to the  conditions in
this Agreement (the "Merger"), pursuant to which each share of common stock, par
value $0.01 per share,  of LabOne ("LabOne Common Stock") issued and outstanding
immediately  prior to the  Effective  Time (other  than shares of LabOne  Common
Stock held by Holdings), subject to the Maximum Cash Payment Amount specified in
Section  2.2(a)(iii) and subject to prior  effectiveness  of the Stock Split (as
defined in Section 3.2(g), shall be converted, at the option of the holder, into
either,  or a combination of (a) the right to receive an amount in cash equal to
$12.75  (the "Cash Price Per Share) or (b) the right to receive one (1) share of
Surviving Corporation Common Stock; provided, however, that immediately prior to
the  Effective  Time (as defined in Section 1.1)  Holdings  shall effect a Stock
Split (as defined in Section 3.2(g)) (payable as a dividend),  pursuant to which
each issued and  outstanding  share of common stock , par value $1.00 per share,
of Holdings  ("Holdings  Common  Stock") shall be converted  into  (assuming the
effectiveness of the Merger) 1.50 shares of Surviving Corporation Common Stock;

         WHEREAS,  the Boards of  Directors  of  Holdings  and LabOne  each have
determined  that the  Merger is in  furtherance  of and  consistent  with  their
respective  long-term  business  strategies  and is  fair  to  and  in the  best
interests of their respective stockholders;



                                        1

<PAGE>
         WHEREAS,  for federal  income tax  purposes,  it is  intended  that the
Merger shall qualify as a tax free transaction  under the United States Internal
Revenue Code of 1986, as amended (the "Code"); and

         WHEREAS,  Holdings and LabOne  desire to make certain  representations,
warranties,  covenants and agreements in connection  with the Merger and also to
prescribe various conditions to the Merger;

         NOW,   THEREFORE,   in   consideration   of  the   foregoing   and  the
representations,  warranties,  covenants and agreements  herein  contained,  the
parties agree as follows:

                               CERTAIN DEFINITIONS

         As used in this Agreement,  "Subsidiary" or "Subsidiaries"  means, with
respect  to  any  party,   any  corporation  or  other   organization,   whether
incorporated or unincorporated, of which: (i) such party or any other Subsidiary
of such party is a general partner (excluding partnerships,  the general partner
interests of which are held by such party or any  Subsidiary  of such party that
do not have a majority of the voting interest in such  partnership);  or (ii) at
least a majority  of the  securities  or other  interests  having by their terms
ordinary  voting  power to elect a majority of the Board of  Directors or others
performing   similar  functions  with  respect  to  such  corporation  or  other
organization is, directly or indirectly, owned or controlled by such party or by
any one or more of its Subsidiaries, or by such party and any one or more of its
Subsidiaries;  provided,  that LabOne and its  Subsidiaries  shall not be deemed
Subsidiaries of Holdings.

                                    ARTICLE I

                                   THE MERGER

         1.1 The  Merger;  Effective  Time of the  Merger.  Upon the  terms  and
conditions of this  Agreement  and in  accordance  with the Delaware Law and The
General and Business  Corporation Law of Missouri (the "Missouri  Law"),  LabOne
shall be merged with and into  Holdings at the  Effective  Time (as  hereinafter
defined).  As  soon  as  practicable  after  the  closing  of  the  Merger  (the
"Closing"), a certificate of merger in substantially the form attached hereto as
Exhibit A-1 (the  "Certificate of Merger"),  prepared and executed in accordance
with the  relevant  provisions  of the  Delaware  Law,  shall be filed  with the
Secretary of State of Delaware,  and articles of merger,  in  substantially  the
form  attached  hereto as Exhibit A-2 (the  "Articles of Merger"),  prepared and
executed in accordance  with the relevant  provisions of the Missouri Law, shall
be filed  with the  Secretary  of State of  Missouri.  The Merger  shall  become
effective  at the time (the  "Effective  Time") when the  Secretary  of State of
Missouri issues a certificate of merger attaching to it the Articles of Merger.



                                        2

<PAGE>
         1.2 Closing.  Unless this Agreement  shall have been terminated and the
transactions  herein  contemplated shall have been abandoned pursuant to Section
7.1,  the  Closing  shall take place at 10:00 a.m. on the same  business  day on
which there is satisfaction (or waiver in accordance with this Agreement) of the
latest to occur of the  conditions  (other than  deliveries of instruments to be
made at Closing) set forth in Article VI (the "Closing Date"), at the offices of
Lathrop & Gage L.C., 2345 Grand  Boulevard,  Kansas City,  Missouri 64108 unless
another date, time or place is agreed to in writing by the parties hereto.

                                   ARTICLE II

                              EFFECT OF THE MERGER

         2.1      Effects of the Merger.

         (a)  Surviving  Corporation.  At the  Effective  Time,  LabOne shall be
merged with and into Holdings,  the separate existence of LabOne shall cease and
Holdings  shall continue as the surviving  corporation  (Holdings and LabOne are
sometimes  referred to herein as the "Constituent  Corporations" and Holdings is
sometimes referred to herein as the "Surviving Corporation").

         (b)  Articles  of  Incorporation.  The  Articles  of  Incorporation  of
Holdings as in effect  immediately  prior to the Effective  Time (the  "Existing
Articles of  Incorporation")  shall be amended to read as set forth in Exhibit B
(the  "Amended  Articles  of   Incorporation")   and  the  Amended  Articles  of
Incorporation   shall  be  the  Articles  of   Incorporation  of  the  Surviving
Corporation.

         (c) Bylaws.  The Bylaws of Holdings as in effect  immediately  prior to
the Effective Time (the "Existing Bylaws") shall be amended to read as set forth
in Exhibit C (the  "Amended  Bylaws")  and shall be the Bylaws of the  Surviving
Corporation.

         (d) Directors and Officers.  The individuals  named on Exhibit D hereto
shall,  from and after the Effective  Time, be the directors and officers of the
Surviving  Corporation.  The initial  terms of such  directors  are set forth on
Exhibit D. Prior to the Effective Time, one additional  person with  significant
experience  in the clinical  laboratories  industry will be named as a director,
and such person's  initial term shall be set, by mutual agreement of the Special
Committee and Holdings. All such persons shall serve until their successors have
been duly  elected or appointed  and  qualified  or until their  earlier  death,
resignation or removal in accordance with the Amended  Articles of Incorporation
and Amended  Bylaws.  If any such person  becomes  unable or  unwilling to serve
prior to the  Effective  Time for any reason,  such  vacancy  shall be filled as
provided in Section 5.9. Directors and officers of Holdings immediately prior to
the


                                        3

<PAGE>
Effective  Time who are not so named shall cease to be directors and officers of
the Surviving Corporation from and after the Effective Time.

         (e) Other. The Merger shall have such other effects as specified in the
Delaware Law and the Missouri Law.

         2.2 Effect of the Merger on Capital  Stock.  At the Effective  Time, by
virtue of the  Merger  and  without  any  action on the part of the  Constituent
Corporations or their respective stockholders:

         (a)      LabOne Common Stock.

                  (i) Subject to the  provisions  of this Section  2.2(a) and to
         the prior effectiveness of the Stock Split, each share of LabOne Common
         Stock issued and  outstanding  immediately  prior to the Effective Time
         (other than shares of LabOne  Common Stock held by  Holdings)  shall be
         converted into, at the option of the holder,  either, or a combination,
         of the following (the "Merger Consideration"):

                           (A) the right to receive an amount in cash equal to
                     the Cash Price Per Share; or

                           (B) the right to receive  one (1) share of  Surviving
                  Corporation Common Stock.

         All such shares of LabOne  Common Stock,  when so  converted,  shall no
         longer be outstanding and shall  automatically  be canceled and retired
         and shall cease to exist, and each holder of a certificate representing
         any such shares  shall cease to have any rights with  respect  thereto,
         except  that,   from  and  after  the  Effective   Time,   certificates
         representing  LabOne  Common Stock (other than shares to be canceled in
         accordance with Section 2.2(c) and other than shares converted into the
         right to receive  cash as  provided  herein)  immediately  prior to the
         Effective Time shall be deemed for all purposes to represent the number
         of shares of  Surviving  Corporation  Common Stock into which they were
         converted  pursuant  to  this  subparagraph  (a)  (provided  that if an
         exchange of certificates  formerly representing LabOne Common Stock for
         certificates   representing   Surviving  Corporation  Common  Stock  is
         required by law or  applicable  rule or  regulation,  the parties  will
         cause the Surviving  Corporation  to arrange for such exchange on a one
         share-for-one  share basis).  Following the Effective Time,  holders of
         such certificates  converted into the right to receive stock may obtain
         new  certificates  that bear the name  "LabOne,  Inc." and that reflect
         Missouri  as the  state of  incorporation  and a par value of $0.01 per
         share by delivering the old certificates to American Stock Transfer and
         Trust Company,  or such other  institution as may be the transfer agent
         of the Surviving  Corporation  (the  "Transfer  Agent"),  together with
         properly completed and


                                        4

<PAGE>
         executed transmittal documents specified by the Transfer Agent. Holders
         of LabOne Common Stock also may (but are not required to) deliver their
         certificates to the Disbursing  Agent referred to in Section 2.2(b) for
         exchange as provided therein.

                  (ii) Subject to the  provisions  of this Section 2.2 (a), each
         record holder of shares of LabOne Common Stock immediately prior to the
         Effective Time will be entitled to: (i) elect to receive the Cash Price
         Per Share  for all of such  shares  ("Cash  Election");  (ii)  elect to
         receive  Surviving  Corporation  Common  Stock  for all of such  shares
         ("Stock Election"); (iii) elect to receive Surviving Corporation Common
         Stock for a stated number of such shares ("Partial Stock Election") and
         to receive the Cash Price Per Share for a stated  number of such shares
         ("Partial Cash Election"); or (iv) indicate that such record holder has
         no  preferences  as to the  receipt  of cash or  Surviving  Corporation
         Common Stock for such shares ("Non-Election"). All such elections shall
         be made on a form  designed for that purpose and mutually  agreeable to
         LabOne and Holdings (a "Form of Election") and shall be irrevocable. If
         such holder  does not make the  election  required  by the  immediately
         preceding  sentence  within  15  days  following  written  notice  from
         Surviving  Corporation regarding the election given pursuant to Section
         2.2(b),  then such holder shall be deemed to have made a  Non-Election,
         in which  case such  holder  will be deemed to have  elected to receive
         Surviving Corporation Common Stock as Merger Consideration.

                  (iii)   Notwithstanding   anything  contained  herein  to  the
         contrary,  the  amount  payable  in cash with  respect to the number of
         shares  of  LabOne  Common  Stock  to be  converted  pursuant  to  this
         Agreement  into the  right  to  receive  cash  shall  not be more  than
         $16,600,000  in the aggregate (the "Maximum Cash Payment  Amount").  If
         the  amount  payable  in cash with  respect  to the number of shares of
         LabOne  Common  Stock  for  which a Cash  Election  or a  Partial  Cash
         Election was made  (collectively,  the "Cash Election  Shares") exceeds
         the Maximum Cash Payment Amount,  then the consideration to be received
         by  stockholders  of LabOne who have made a Cash  Election or a Partial
         Cash Election shall be adjusted in the manner provided below.

                  (iv) All  shares  of  LabOne  Common  Stock  for which a Stock
         Election or a Partial Stock Election are made (collectively, the "Stock
         Election  Shares")  shall  be  converted  into  the  right  to  receive
         Surviving Corporation Common Stock.

                  (v) If  the  cash  otherwise  payable  with  respect  to  Cash
         Election  Shares  exceeds the Maximum  Cash  Payment  Amount,  the Cash
         Election Shares shall be converted into the right to receive  Surviving
         Corporation Common Stock and cash in the following manner, so that each
         Cash Election Share shall be converted into the right to receive:

                                        5
<PAGE>
                           (A) an amount in cash  (rounded to the  nearest  cent
                  and  subject  to  adjustment,  as  provided  in clause  (v)(B)
                  below), without interest, equal to the product of (A) the Cash
                  Price Per  Share and (B) a  fraction  ("Cash  Fraction"),  the
                  numerator of which shall be the Maximum  Cash  Payment  Amount
                  and the  denominator  of which shall be the  aggregate  amount
                  payable  (except for clause (iii) of this  paragraph (a)) with
                  respect to all Cash Election Shares; and

                           (B) a  number  of  shares  of  Surviving  Corporation
                  Common Stock equal to the product of (I) one (1) multiplied by
                  (II) a fraction equal to one (1) minus the Cash  Fraction.  If
                  the  product  of  clause   (v)(B)(I)  and  (II)  result  in  a
                  fractional share (taking into account all Cash Election Shares
                  held by a  holder),  then the  number  of  shares to be issued
                  shall be rounded up to the nearest  whole number of shares and
                  the  amount  of cash  payable  under  clause  (v)(A)  shall be
                  reduced by $12.75 less the value of such fraction.

                  (vi) If the aggregate  amount payable with respect to all Cash
         Election Shares is less than the Maximum Cash Payment Amount, then each
         Cash  Election  Share shall be converted  into the right to receive the
         Cash Price Per Share.


         (b)      Exchange of LabOne Certificates.

                  (i)  Prior  to the  Effective  Time,  Holdings  shall  appoint
         American Stock Transfer &Trust Company, or such other institution as it
         may select, to act as disbursing agent (the "Disbursing Agent") for the
         payment  of  merger   consideration   upon  surrender  of  certificates
         representing  the shares of LabOne  Common  Stock.  Holdings will enter
         into a disbursing  agent  agreement with the Disbursing  Agent, in form
         and substance reasonably  acceptable to LabOne. At such times, and from
         time to  time,  as the  Disbursing  Agent  requires  funds  to make the
         payments of the  disbursements  pursuant to Section  2.2(a),  Surviving
         Corporation  shall deposit or cause to be deposited with the Disbursing
         Agent in trust for the  benefit  of  LabOne's  stockholders  cash in an
         aggregate  amount  necessary  to make the  cash  payments  pursuant  to
         Section  2.2(a)  and/or such number of shares of Surviving  Corporation
         Common  Stock  necessary  to  exchange  the  LabOne  Common  Stock  for
         Surviving  Corporation  Stock  pursuant to Section 2.2(a) to holders of
         shares of LabOne Common stock requesting the same.

                  (ii)  Promptly   after  the  Effective   Time,  the  Surviving
         Corporation shall cause the Disbursing Agent to mail to each person who
         was a  record  holder  as  of  the  Effective  Time  of an  outstanding
         certificate or certificates which immediately


                                        6

<PAGE>
         prior to the Effective Time  represented  shares of LabOne Common Stock
         (the "LabOne  Certificates"),  and whose shares were converted into the
         right to receive Merger  Consideration  pursuant to Section  2.2(a),  a
         Form of  Election  contained  in a letter of  transmittal  ("Letter  of
         Transmittal") (which shall specify that delivery shall be effected, and
         risk of loss and title to the LabOne Certificates shall pass, only upon
         proper delivery of the LabOne Certificates to the Disbursing Agent) and
         instructions   for  use  in  effecting  the  surrender  of  the  LabOne
         Certificates in exchange for payment of the Merger  Consideration,  all
         in a form  reasonably  approved  by  Holdings  and LabOne  prior to the
         Effective  Time.  The letter will also  provide  information  about the
         holders'  opportunity  to elect  Merger  Consideration  as set forth in
         Section  2.2(a).  Upon  surrender to the  Disbursing  Agent of a LabOne
         Certificate,  together with a Letter of  Transmittal  duly executed and
         such other  documents as may be reasonably  required by the  Disbursing
         Agent,  the  holder  of such  Certificate  shall  be  paid in  exchange
         therefor the Merger  Consideration  elected by the holder in accordance
         with Section  2.2(a),  and such LabOne  Certificate  shall forthwith be
         canceled.   No  interest   will  be  paid  or  accrued  on  the  Merger
         Consideration payable upon the surrender of the LabOne Certificates. If
         payment  is to be made to a person  other than the person in whose name
         the  LabOne  Certificate  surrendered  is  registered,  it  shall  be a
         condition  of payment that the LabOne  Certificate  so  surrendered  be
         properly  endorsed or otherwise be in proper form for transfer and that
         the person  requesting  such  payment  pay any  transfer or other taxes
         required by reason of the payment to a person other than the registered
         holder  of the  LabOne  Certificate  surrendered  or  establish  to the
         satisfaction of the Surviving  Corporation  that such tax has been paid
         or is not applicable.  Surviving Corporation shall have the discretion,
         which it may delegate in whole or in part to the Disbursing  Agent,  to
         determine  whether  Forms of  Election  have been  properly  completed,
         signed and submitted  and to disregard  any defects it  determines  are
         immaterial.  The decision of Surviving  Corporation  or the  Disbursing
         Agent  on  such  matters  shall  be  conclusive  and  binding.  Neither
         Surviving  Corporation  nor the  Disbursing  Agent  shall be under  any
         obligation  to  notify  any  person  of  any  defect  in  a  Letter  of
         Transmittal submitted to the Disbursing Agent. If Surviving Corporation
         or Disbursing  Agent shall  determine that any purported Cash Election,
         Partial Cash Election, Stock Election or Partial Stock Election was not
         properly  made,  such  purported  election  shall be deemed to be of no
         force  and  effect  and any  stockholder  making  such  purported  Cash
         Election,  Partial  Cash  Election,  Stock  Election  or Partial  Stock
         Election   shall  for  purposes   hereof  be  deemed  to  have  made  a
         Non-Election.

                  (iii) All cash paid upon the surrender of LabOne  Certificates
         including  Cash Election  Shares in  accordance  with the terms of this
         Section 2.2 shall be deemed to have been paid in full  satisfaction  of
         all rights  pertaining to the shares of LabOne Common Stock  previously
         represented by such LabOne Certificates.



                                        7

<PAGE>
                  (iv) At any time more than 180 days after the Effective  Time,
         the Surviving  Corporation  shall be entitled to require the Disbursing
         Agent to  deliver  to it any funds or shares of  Surviving  Corporation
         Common Stock which had been made available to the Disbursing  Agent and
         not disbursed in exchange for LabOne Certificates  (including,  without
         limitation,  all interest,  dividends and other income  received by the
         Disbursing Agent in respect of all such funds and shares).  Thereafter,
         holders  of  shares  of  LabOne  Common  Stock  shall  look only to the
         Surviving   Corporation  (subject  to  the  terms  of  this  Agreement,
         abandoned  property,   escheat  and  other  similar  laws)  as  general
         creditors thereof with respect to any Merger  Consideration that may be
         payable,   without   interest,   upon  due   surrender  of  the  LabOne
         Certificates held by them.

                  (v) No dividends  or other  distributions  declared  after the
         Effective Time with respect to Surviving Corporation Common Stock which
         are payable to  shareholders of record of Surviving  Corporation  after
         the  Effective  Time  shall be paid to a  stockholder  of  LabOne  with
         respect to Cash Election Shares.

         (c) LabOne  shares  held by Holdings  and LabOne.  Each share of LabOne
Common  Stock held by Holdings  or LabOne  shall,  by virtue of the Merger,  and
without any action on the part of Holdings  or LabOne,  cease to be  outstanding
and be cancelled without payment of any  consideration  therefor and shall cease
to exist.

         (d) Holdings  Common  Stock.  Subject to the  provisions of Section 2.3
hereof,  each share of Holdings Common Stock issued and outstanding  immediately
prior to the  Effective  Time  (other  than  Dissenting  Shares (as  hereinafter
defined)) and each treasury share, assuming the prior effectiveness of the Stock
Split,  shall be converted  into a share of Surviving  Corporation  Common Stock
(provided that if an exchange of  certificates  formerly  representing  Holdings
Common Stock for certificates representing Surviving Corporation Common Stock is
required by law or  applicable  rule or  regulation,  the parties will cause the
Surviving  Corporation to arrange for such exchange on a one share-for-one share
basis).  Following  the  Effective  Time  holders of such  shares may obtain new
certificates that bear the name "LabOne,  Inc." and that reflect Missouri as the
state of incorporation  and a par value of $0.01 per share by delivering the old
certificates  to the Transfer Agent of the Surviving  Corporation  together with
properly completed and executed transmittal  documents specified by the Transfer
Agent.

         (e) Assumption of LabOne Stock Options.  Each outstanding  LabOne Stock
Option  (as  defined  in  Section  5.10)  shall  be  assumed  by  the  Surviving
Corporation  as provided in Section  5.10. No LabOne Stock Options shall vest or
become  exercisable  as a result of the Merger or change in stock  ownership  or
composition of the Board of Directors of the Surviving Corporation.



                                        8

<PAGE>
         (f) Adjustment of Holdings Stock Options.  The Holdings 1997 Directors'
Stock  Option  Plan,  as amended (the  "Holdings  Stock Option  Plan") and stock
options  issued  thereunder  ("Holdings  Stock  Options")  shall be adjusted and
amended in the following manner, subject to the prior effectiveness of the Stock
Split, at the Effective Time:

                  (i) The number of shares authorized for issuance under Section
         4 of the  Holdings  Stock  Option  Plan shall be  adjusted to an amount
         equal to the product of 90,000 times 1.50.

                  (ii) The first  sentence  of Section 5 of the  Holdings  Stock
         Option Plan shall be amended at the Effective Time to add the following
         proviso: "provided, however, no options shall be granted under the Plan
         from  and  after  the  Effective  Time of any  merger  of  LabOne  into
         Holdings."

                  (iii) The  amendments  to the  Holdings  Stock Option Plan and
         Holdings Stock Options outstanding  thereunder that were adopted by the
         Board of Directors of Holdings on August 27, 1998  extending the period
         during  which such options may be exercised  following  termination  of
         director status, shall be deemed ratified, confirmed and approved.

                  (iv) Holdings  Stock Options  granted under the Holdings Stock
         Option Plan that are  outstanding  immediately  prior to the  Effective
         Time shall be adjusted  such that the number of shares  subject to each
         option immediately prior to the Effective Time shall be increased to an
         amount  equal to such  number  times  1.50 and the price to be paid for
         each such share upon exercise  shall be reduced to a price equal to the
         exercise price immediately prior to the Effective Time divided by 1.50.

                  (v) The  foregoing  shall be deemed to  adjust  and  otherwise
         supersede any  conflicting  provisions  contained in the Holdings Stock
         Option  Plan or the  option  agreements  covering  the  Holdings  Stock
         Options,  including  the  provisions  of Section 3 of each such  option
         agreements.

         (g) Stated Capital.  Immediately after the Effective Time, the stated
capital of the  Surviving  Corporation  shall be reduced  by  transferring  from
stated  capital to  paid-in-surplus  all amounts in excess of the  aggregate par
value of shares of Surviving Corporation Common Stock issued after giving effect
to the Merger.

         2.3 Dissenting  Shares.  Notwithstanding  anything in this Agreement to
the contrary,  shares of Holdings  Common Stock that are issued and  outstanding
immediately  prior to the Effective Time and which are held by shareholders  who
have properly  exercised  dissenters'  rights with respect thereto under Section
351.455 of the Missouri Law (the "Dissenting  Shares") shall not be converted as
provided in Section 2.2(d), but


                                        9

<PAGE>
the holders of  Dissenting  Shares  shall be entitled to receive such payment of
the fair value of such shares  held by them from the  Surviving  Corporation  as
shall be  determined  in a judicial  proceeding  pursuant to the  Missouri  Law;
provided, however, that if any such holder shall have failed to perfect or shall
withdraw or lose the right to appraisal and payment under the Missouri Law, each
such holder's  shares shall thereupon be deemed to have been converted as of the
Effective Time without any interest thereon,  as provided in Section 2.2(d), and
such shares shall no longer be Dissenting Shares.

         2.4 No  Liability.  Neither  Holdings nor LabOne shall be liable to any
holder of shares of LabOne Common Stock or Holdings  Common  Stock,  as the case
may be, for such shares (or dividends or  distributions  with respect  thereto),
any  Merger  Consideration  or cash in lieu of  fractional  shares of  Surviving
Corporation  Common  Stock  delivered  to a  public  official  pursuant  to  any
applicable  abandoned  property,  escheat or similar law. Any amounts  remaining
unclaimed by holders of any such shares on the day immediately preceding the day
on which such  amounts  would  otherwise  escheat to or become  property  of any
governmental entity shall, to the extent permitted by applicable law, become the
property of  Surviving  Corporation  free and clear of any claims or interest of
any such  holders  or their  successors,  assigns  or  personal  representatives
previously entitled thereto.

                                   ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

         3.1  Representations  and Warranties of LabOne.  LabOne  represents and
warrants to Holdings as follows:

         (a)   Organization,   Standing  and  Power.  Each  of  LabOne  and  its
Subsidiaries  is a corporation,  partnership or limited  liability  company duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction of its  incorporation or organization,  has all requisite power and
authority to own,  lease and operate its properties and to carry on its business
as now  being  conducted,  and is  duly  qualified  and in good  standing  to do
business in each  jurisdiction  in which the business it is  conducting,  or the
operation,  ownership  or leasing of its  properties,  makes such  qualification
necessary,  other than in such jurisdictions  where the failure to qualify would
not have a LabOne  Material  Adverse  Effect  (as  defined  below).  LabOne  has
heretofore  delivered to Holdings complete and correct copies of its Certificate
of  Incorporation  and Bylaws and the  organizational  documents  of each of its
Subsidiaries.  All Subsidiaries of LabOne,  the percentage of LabOne's ownership
of such Subsidiaries, the identity and percentage ownership of all other persons
with equity interests in such Subsidiaries and their respective jurisdictions of
incorporation  or  organization  are identified on Schedule 3.1(a) of the letter
dated and delivered to Holdings on the date hereof (the "LabOne Letter"),  which
relates to this Agreement and is designated  therein as being LabOne Letter.  As
used in this Agreement,  a "LabOne  Material Adverse Effect" or "LabOne Material
Adverse Change" shall mean


                                       10

<PAGE>
any  effect or change  that is,  individually  or in the  aggregate,  materially
adverse to the business,  operations, assets, condition (financial or otherwise)
or results of operation of LabOne and its  Subsidiaries  taken as a whole except
for  general  economic  changes and changes  that may affect the  industries  of
LabOne or any of its Subsidiaries generally.

         (b) Capital  Structure.  As of the date hereof,  the authorized capital
stock of LabOne consists of 40,000,000  shares of LabOne Common Stock, par value
$0.01 per share,  and 1,000,000  shares of preferred  stock, par value $0.01 per
share ("LabOne Preferred  Stock").  At the close of business on the date hereof,
(i) 13,311,450  shares of LabOne Common Stock are issued and  outstanding,  (ii)
2,150,000  shares are reserved for issuance  pursuant to LabOne's 1987 Long Term
Incentive  Plan,  1,000,000  shares of LabOne  Common  Stock  are  reserved  for
issuance  pursuant to LabOne's 1997  Incentive  Plan , 100,000  shares of LabOne
Common  Stock are  reserved  for  issuance  pursuant to LabOne's  Stock Plan for
Non-Employee  Directors and 1,000,000 shares of LabOne Common Stock are reserved
for issuance  pursuant to warrants  issued to National  Support  Services,  Inc,
dated  February 23, 1998 and USA Managed Care  Organization,  dated November 13,
1998 (the  "Warrants")  (LabOne's 1987 Long Term Incentive  Plan, 1997 Incentive
Plan, Plan for Non-Employee  Directors and Warrant are collectively  referred to
as the "LabOne Stock Option Plans"), (iii) 869,244 shares of LabOne Common Stock
are issuable  pursuant to outstanding and unvested stock options or other rights
granted  pursuant to LabOne Stock  Option  Plans,  and 968,683  shares of LabOne
Common Stock are issuable  pursuant to  outstanding  and vested stock options or
other rights  granted  pursuant to LabOne Stock Option Plans;  (iv) no shares of
LabOne Preferred Stock are issued and outstanding; and (v) no bonds, debentures,
notes or other  indebtedness  having  the  right  to vote (or  convertible  into
securities having the right to vote) on any matters on which LabOne stockholders
may vote  ("LabOne  Voting  Debt") are issued or  outstanding.  All  outstanding
shares of LabOne  Common Stock have been duly  authorized,  are validly  issued,
fully paid and nonassessable and are not subject to preemptive rights. Except as
set forth on Schedule  3.1(b) of the LabOne Letter,  all  outstanding  shares of
capital stock of the Subsidiaries of LabOne are owned by LabOne,  or a direct or
indirect  wholly  owned  Subsidiary  of  LabOne,  free and  clear of all  liens,
charges, encumbrances,  claims and options of any nature. Except as set forth in
this  Section  3.1(b) or on  Schedule  3.1(b) of LabOne  Letter  and  except for
changes  resulting  from the exercise of employee  stock  options (or  Warrants)
outstanding on the date hereof granted pursuant to LabOne Stock Option Plans, or
as  contemplated  by this  Agreement,  there are  outstanding:  (i) no shares of
capital stock,  LabOne Voting Debt or other voting securities of LabOne; (ii) no
securities  of  LabOne  or  any  Subsidiary  of  LabOne   convertible   into  or
exchangeable  for shares of capital  stock,  LabOne  Voting Debt or other voting
securities  of  LabOne  or any  Subsidiary  of  LabOne;  and  (iii) no  options,
warrants, calls, rights (including preemptive rights), commitments or agreements
to which LabOne or any  Subsidiary  of LabOne is a party or by which it is bound
in any case  obligating  LabOne or any  Subsidiary of LabOne to issue,  deliver,
sell,  purchase,  redeem or  acquire,  or cause to be issued,  delivered,  sold,
purchased,  redeemed  or  acquired,  additional  shares of capital  stock or any
LabOne Voting


                                       11

<PAGE>
Debt or other voting  securities of LabOne or of any  Subsidiary  of LabOne,  or
obligating LabOne or any Subsidiary of LabOne to grant, extend or enter into any
such option, warrant, call, right, commitment or agreement.  Except as set forth
on  Schedule  3.1(b) of LabOne  Letter,  there  are no  stockholder  agreements,
registration rights, voting trusts or other similar agreements or understandings
to which  LabOne  is a party or by which it is  bound.  Except  as set  forth on
Schedule  3.1(b) of the LabOne  Letter,  there are no  restrictions  on LabOne's
ability  to vote the stock  held by LabOne  of any of its  Subsidiaries.  To the
knowledge of LabOne,  as of the date of this Agreement,  except for W. D. Grant,
Wallace R. Weitz & Company and a group consisting of American Century Investment
Management,  Inc. and American Century Capital Portfolios,  Inc., no stockholder
of LabOne or "group"  within the meaning of Section  13(d)(3) of the  Securities
Exchange Act of 1934, as amended (the "Exchange Act"), will be immediately after
the Effective Time the beneficial owner of more than 10% of the then outstanding
Surviving Corporation Common Stock.

         (c)  Non-Subsidiaries  Equity  Investment.  Schedule  3.1(c)  of LabOne
Letter  sets  forth the book  value of each  investment  by LabOne or any of its
Subsidiaries  in the voting  securities,  partnership  interests or other equity
interests  of  any  corporation,  partnership  or  other  entity  (other  than a
Subsidiary  of  LabOne)  and  the  nature  and  percentage  of  LabOne's  or its
Subsidiaries'  ownership  interests in such  investment.  Except as set forth in
Schedule 3.1(c) of LabOne Letter, the voting securities,  partnership  interests
or other equity  interests of LabOne or its Subsidiaries in such investments are
owned free and clear of all liens, charges and encumbrances.

         (d)      Authority; No Violations; Consents and Approvals.

                  (i)  Upon  the  recommendation  of the  Special  Committee  of
         independent outside directors of the Board of Directors of LabOne, (the
         "Special Committee"), the Board of Directors of LabOne has approved the
         Merger and this Agreement,  by unanimous vote of the directors  (except
         for those  directors who  abstained),  and declared the Merger and this
         Agreement to be advisable and in the best interests of the stockholders
         of LabOne.  LabOne has all requisite  corporate  power and authority to
         enter into this Agreement and, subject, with respect to consummation of
         the  Merger,  to  approval  of this  Agreement  and the  Merger  by the
         stockholders  of  LabOne  in  accordance  with  the  Delaware  Law,  to
         consummate  the  transactions  contemplated  hereby.  The execution and
         delivery of this  Agreement and the  consummation  of the  transactions
         contemplated   hereby  have  been  duly  authorized  by  all  necessary
         corporate  action  on the part of  LabOne,  subject,  with  respect  to
         consummation  of the  Merger,  to approval  of this  Agreement  and the
         Merger by the  stockholders  of LabOne in accordance  with the Delaware
         Law. This Agreement has been duly executed and delivered by LabOne and,
         subject,  with respect to  consummation  of the Merger,  to approval of
         this  Agreement  and  the  Merger  by the  stockholders  of  LabOne  in
         accordance with the Delaware Law, and assuming this


                                       12

<PAGE>
         Agreement  constitutes  the valid and binding  obligation  of Holdings,
         constitutes  a valid and binding  obligation of LabOne  enforceable  in
         accordance  with its terms except to the extent that the enforcement of
         this   Agreement  may  be  limited  by  (i)   bankruptcy,   insolvency,
         reorganization,  moratorium  or other  similar laws now or hereafter in
         effect  relating  to  creditors'  rights  generally,  and (ii)  general
         principles of equity regardless of whether enforceability is considered
         in a proceeding in equity or at law.

                  (ii)  Except as set  forth on  Schedule  3.1(d) of the  LabOne
         Letter,  the execution and delivery of this Agreement does not, and the
         consummation  of the  transactions  contemplated  hereby and compliance
         with the  provisions  hereof will not,  conflict with, or result in any
         violation of, or default  (with or without  notice or lapse of time, or
         both) under,  or give rise to a right of  termination,  cancellation or
         acceleration  of any  obligation  or to the loss of a material  benefit
         under, or result in the creation of any lien, security interest, charge
         or encumbrance upon any of the properties or assets of LabOne or any of
         its  Subsidiaries  under,  any  provision  of (i)  the  Certificate  of
         Incorporation  or Bylaws of LabOne or any  provision of the  comparable
         charter or organizational  documents of any of its  Subsidiaries,  (ii)
         any loan or  credit  agreement,  note,  bond,  mortgage,  or  indenture
         applicable  to  LabOne  or any of its  Subsidiaries,  (iii)  any  other
         agreement,   instrument,  permit,  concession,   franchise  or  license
         applicable  to LabOne or any of its  Subsidiaries  or (iv) assuming the
         consents,   approvals,   authorizations   or  permits  and  filings  or
         notifications  referred to in Section  3.1(d)(iii)  are duly and timely
         obtained or made and the  approval of the Merger and this  Agreement by
         the  stockholders  of  LabOne  has been  obtained  in  accordance  with
         Delaware Law, any judgment,  order,  decree,  statute,  law, ordinance,
         rule or regulation  applicable to LabOne or any of its  Subsidiaries or
         any of their respective  properties or assets,  other than, in the case
         of clause (iii),  any such  conflicts,  violations,  defaults,  rights,
         liens, security interests,  charges or encumbrances that,  individually
         or in the aggregate,  would not have a LabOne Material  Adverse Effect,
         materially  impair the  ability of LabOne to  perform  its  obligations
         hereunder  or  prevent  the  consummation  of any  of the  transactions
         contemplated hereby.

                  (iii) No  consent,  approval,  order or  authorization  of, or
         registration,  declaration  or filing  with,  or permit from any court,
         administrative agency or commission or other governmental  authority or
         instrumentality,  domestic  or foreign (a  "Governmental  Entity"),  is
         required  by or with  respect to LabOne or any of its  Subsidiaries  in
         connection  with the execution and delivery of this Agreement by LabOne
         or the consummation by LabOne of the transactions  contemplated hereby,
         as to which the failure to obtain or make would have a LabOne  Material
         Adverse  Effect,  except for:  (A) the filing with the  Securities  and
         Exchange Commission (the "SEC") of a proxy statement in preliminary and
         definitive form relating to the meeting of LabOne's  stockholders to be
         held in connection with the approval of this


                                       13

<PAGE>
         Agreement and the Merger by stockholders of LabOne,  such reports under
         Section  13(a) of the Exchange Act and such other  compliance  with the
         Securities  Act and the  Exchange  Act and the  rules  and  regulations
         thereunder as may be required in connection with this Agreement and the
         transactions  contemplated  hereby,  and the obtaining  from the SEC of
         such orders as may be so required;  (B) filings with,  and approval of,
         the Nasdaq  Stock  Market;  (C) such  filings and  approvals  as may be
         required by any  applicable  state  securities,  "blue sky" or takeover
         laws,  or  environmental  laws;  and (D) the filing of the  Articles of
         Merger with the  Secretary  of State of the State of  Missouri  and the
         Certificate  of  Merger  with the  Secretary  of State of the  State of
         Delaware.

         (e) SEC  Documents.  LabOne has made  available  to Holdings a true and
complete copy of each quarterly,  annual or current report on Form 10-Q, 10-K or
8-K, registration  statement and definitive proxy statement filed by LabOne with
the  SEC  since  January  1,  1994,  which  are all the  documents  (other  than
preliminary  material)  that  LabOne  was  required  to file  with the SEC since
January 1, 1994.  LabOne will make  available to  Holdings,  a true and complete
copy of each  quarterly,  annual or current  report on Form  10-Q,  10-K or 8-K,
registration  statement and definitive  proxy statement filed by LabOne with the
SEC  subsequent to the date of this  Agreement and prior to the Effective  Time.
All of such reports and statements filed prior to the date of this Agreement are
hereinafter  referred to as the "LabOne SEC  Documents." As of their  respective
filing dates (or if amended or  superseded by a filing prior to the date hereof,
then on the date of such  filing),  the LabOne  SEC  Documents  complied  in all
material  respects with the  requirements  of the Securities Act or the Exchange
Act,  as the case may be, and the rules and  regulations  of the SEC  thereunder
applicable  to such LabOne SEC  Documents,  and none of the LabOne SEC Documents
contained any untrue statement of a material fact or omitted to state a material
fact required to be stated therein or necessary to make the statements  therein,
in light of the circumstances under which they were made, not misleading.  As of
their respective  filing dates (or if amended or superseded by a filing prior to
the date hereof, then on the date of such filing),  the financial  statements of
LabOne included in the LabOne SEC Documents  complied as to form in all material
respects  with the  published  rules  and  regulations  of the SEC with  respect
thereto,   were  prepared  in  accordance  with  generally  accepted  accounting
principles in effect in the United States ("GAAP") applied on a consistent basis
during  the  periods  involved  (except  (i) as may be  indicated  in the  notes
thereto,  (ii)  in  the  case  of  the  unaudited  financial  statements,   such
differences  in  presentation  or  omissions  as  permitted  by  Rule  10-01  of
Regulation  S-X of the SEC and (iii) the unaudited  financial  statements do not
contain  all notes  required  by GAAP) and  fairly  present in  accordance  with
applicable requirements of GAAP (subject, in the case of the unaudited financial
statements,  to normal  year-end  adjustments  on a basis  comparable  with past
periods)  the  consolidated  financial  position of LabOne and its  consolidated
Subsidiaries  as of their  respective  dates  and the  consolidated  results  of
operations  and the  consolidated  cash  flows of  LabOne  and its  consolidated
Subsidiaries for the periods presented therein.

                                       14

<PAGE>
         (f) Information  Supplied.  None of the  information  supplied or to be
supplied by LabOne for  inclusion or  incorporation  by reference in  Holdings's
1998 Form 10-Ks,  Form 10-Qs or Form 8-Ks or the Registration  Statement on Form
S-4 to be filed with the SEC by  Holdings  in  connection  with the  issuance of
shares of Surviving  Corporation Common Stock in the Merger (the "S-4") will, at
the time the S-4 becomes  effective  under the Securities Act, and the rules and
regulations  thereunder or at the  Effective  Time (or in the case of Holdings's
Form 10-K, upon filing thereof), contain any untrue statement of a material fact
or omit to state any material fact required to be stated therein or necessary to
make the statements therein not misleading, and none of the information supplied
or to be supplied by LabOne and  included or  incorporated  by  reference in the
related  joint proxy  statement  (the "Proxy  Statement")  will,  at the time of
mailing  thereof or at the time of the meetings of the  stockholders of Holdings
or LabOne to be held in  connection  with the Merger or at the  Effective  Time,
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  are  made,  not
misleading. If at any time prior to the Effective Time any event with respect to
LabOne or any of its Subsidiaries, or with respect to other information supplied
by LabOne for  inclusion  in the Proxy  Statement  or S-4,  shall occur which is
required to be  described  in an  amendment  of, or a  supplement  to, the Proxy
Statement or the S-4,  such event shall be so described,  and such  amendment or
supplement  shall  be  promptly  filed  with the SEC and,  as  required  by law,
disseminated to the  stockholders of Holdings and LabOne.  The S-4 and the Proxy
Statement,  insofar  as they  relate  to  LabOne  or its  Subsidiaries  or other
information supplied by LabOne for inclusion therein,  will comply as to form in
all material respects with the provisions of the Securities Act and the Exchange
Act, and the rules and regulations thereunder.

         (g) Absence of Certain  Changes or Events.  Except as disclosed  in, or
reflected in the financial statements included in the LabOne SEC Documents or on
Schedule  3.1(g)  of the  LabOne  Letter,  or  except  as  contemplated  by this
Agreement,  since  September  30,  1998,  LabOne  has in all  material  respects
conducted its business only in the ordinary  course and there has not been:  (i)
any declaration,  setting aside or payment of any dividend or other distribution
(whether in cash,  stock or property)  with  respect to any of LabOne's  capital
stock other than regular quarterly cash dividends consistent with past practice;
(ii) any amendment of any material term of any  outstanding  equity  security of
LabOne or any Subsidiary; (iii) any repurchase,  redemption or other acquisition
by LabOne or any Subsidiary of any outstanding  shares of capital stock or other
equity securities of, or other ownership interests in, LabOne or any Subsidiary;
(iv) any material change in any method of accounting or accounting practice,  or
in any tax method, principle,  election or practice by LabOne or any Subsidiary;
(v) if the covenants and agreements with respect to LabOne and its  Subsidiaries
set forth in Section  4.1 had been  applicable  to LabOne  and its  Subsidiaries
during the period from  September  30, 1998 to the date of this  Agreement,  any
action, transaction, commitment or failure to act that would cause LabOne or any
such


                                       15

<PAGE>
Subsidiary  to fail to comply with such  covenants and  agreements;  or (vi) any
other  action,  transaction,  commitment,  dispute or other  event or  condition
(financial or otherwise) of any character (whether or not in the ordinary course
of  business)  that has had, or may  reasonably  be  expected to have,  a LabOne
Material Adverse Effect.

         (h) No Undisclosed Material  Liabilities.  Except as fully reflected or
reserved against in financial  statements  included in the LabOne SEC Documents,
or  disclosed in the  footnotes  thereto,  or referred to in Schedule  3.1(h) or
elsewhere in LabOne  Letter,  as of the date hereof LabOne and its  Subsidiaries
have no  liabilities,  absolute or  contingent,  other than  liabilities  which,
individually or in the aggregate,  are reasonably  expected not to have a LabOne
Material Adverse Effect. Except as so reflected,  reserved or disclosed,  LabOne
and  its  Subsidiaries  have  no  commitments  which,  individually  or  in  the
aggregate, are reasonably expected to have a LabOne Material Adverse Effect.

         (i) Material Contracts;  No Defaults.  All of the material contracts of
LabOne and its Subsidiaries  that are required to be described in the LabOne SEC
Documents  or to be filed as exhibits  thereto,  or that would be required to be
described or filed if a Form 10-K with respect to the LabOne were required to be
filed on the date  hereof,  have  been  described  or  filed in the  LabOne  SEC
Documents  except as disclosed on Schedule 3.1(i) of the LabOne Letter.  Neither
LabOne nor any of its  Subsidiaries  is in violation of or in default under (and
no event has  occurred  which,  with notice or the lapse of time or both,  would
constitute a default or violation) of any term, condition or provision of (i) in
the  case of  LabOne  and its  Subsidiaries,  their  respective  certificate  or
articles of  incorporation  and bylaws or comparable  organizational  documents,
(ii) except as  disclosed  in Schedule  3.1(i) of the LabOne  Letter,  any note,
bond, mortgage,  indenture, license, agreement or other instrument or obligation
to which LabOne or any of its  Subsidiaries is now a party or by which LabOne or
any of its Subsidiaries or any of their  respective  properties or assets may be
bound or (iii) any order, writ, injunction,  decree, statute, rule or regulation
applicable to LabOne or any of its Subsidiaries,  except in the case of (ii) and
(iii) for defaults or violations  which in the aggregate would not have a LabOne
Material  Adverse  Effect.  Schedule  3.1(i) of the  LabOne  Letter  lists  each
contract (a) containing  covenants which in any way purport to limit the freedom
of LabOne or any of its Subsidiaries to engage in any line of business or engage
in business in any  geographic  area or to compete with any person,  or (b) that
imposes a material obligation (contingent or otherwise) that is not reflected in
LabOne's  audited GAAP financial  statements  and notes thereto  included in its
most recently filed Annual Report on Form 10-K.  Except as disclosed on Schedule
3.1(i) of the LabOne  Letter,  to the  knowledge  of  LabOne,  none of the other
parties to material  contracts of LabOne or its Subsidiaries are in violation of
or in default under (nor does there exist any  condition  which upon the passage
of time or the  giving of notice  would  cause  such a  violation  of or default
under) any contract,  other than such violations or defaults as would not have a
LabOne Material Adverse Effect.


                                       16

<PAGE>
         (j) Compliance with Applicable Laws.  LabOne and its Subsidiaries  hold
all permits, licenses, variances,  exemptions,  orders, franchises and approvals
of  all  Governmental  Entities  necessary  for  the  lawful  conduct  of  their
respective  businesses  (the "LabOne  Permits"),  except where the failure so to
hold  would  not  have  a  LabOne  Material  Adverse  Effect.   LabOne  and  its
Subsidiaries  are in compliance with the terms of LabOne  Permits,  except where
the failure so to comply would not have a LabOne Material Adverse Effect. Except
as disclosed or as set forth on Schedule 3.1(j),  3.1(k), 3.1(l), 3.1(m), 3.1(n)
or 3.1(o) of LabOne Letter,  the businesses of LabOne and its  Subsidiaries  are
not being conducted in violation of any law, ordinance,  regulation, judgment or
decree of any Governmental  Entity,  except for possible  violations which would
not have a LabOne  Material  Adverse  Effect.  Except as set  forth on  Schedule
3.1(j) of LabOne Letter,  as of the date of this Agreement,  no investigation or
review  by  any  Governmental  Entity  with  respect  to  LabOne  or  any of its
Subsidiaries is, to the best knowledge of LabOne,  pending or threatened,  other
than those the outcome of which would not have a LabOne Material Adverse Effect.

         (k) Litigation.  Schedule 3.1(k) of LabOne Letter  discloses all suits,
actions or proceedings pending, or, to, the best knowledge of LabOne, threatened
against LabOne or any Subsidiary of LabOne ("LabOne  Litigation") on the date of
this Agreement and all judgments, decrees,  injunctions,  rules or orders of any
Governmental  Entity or arbitrator  outstanding against LabOne or any Subsidiary
of LabOne ("LabOne Order") on the date of this Agreement,  in each case in which
the amount claimed or that could be involved is in excess of $100,000. Except as
disclosed on Schedule  3.1(k) of LabOne  Letter,  there is no LabOne  Litigation
that,  individually  or in the aggregate  with all other LabOne  Litigation,  is
reasonably  likely to have a LabOne Material  Adverse  Effect,  nor is there any
LabOne  Order  that,  individually  or in the  aggregate  with all other  LabOne
Litigation,  is reasonably  likely to have a LabOne Material Adverse Effect or a
material adverse effect on LabOne's ability to perform its obligations hereunder
or to consummate the transactions contemplated by this Agreement.

         (l) Taxes. With respect to any period and with respect to any action as
to which the applicable  statute of  limitations  has not expired as of the date
hereof,  and except as set forth on  Schedule  3.1(l) of the  LabOne  Letter and
except for  exceptions to the following that would not,  individually  or in the
aggregate, have a LabOne Material Adverse Effect:

                  (i)  LabOne  and  each of its  Subsidiaries  has (A)  duly and
         timely (taking into account any extensions)  filed all federal,  state,
         local,  foreign and other returns,  declarations,  reports,  estimates,
         information returns and statements  ("Returns") required to be filed or
         sent by or with  respect to it in respect of any Taxes (as  hereinafter
         defined), other than consolidated or combined Returns that are required
         to be filed by Holdings pursuant to the Tax Sharing Agreement (as


                                       17

<PAGE>
         hereinafter defined),  (B) duly paid or deposited on a timely basis all
         Taxes (including  estimated Taxes) that are due and payable (except for
         audit  adjustments  not material in the aggregate or to the extent that
         liability  therefor is reserved  for in  LabOne's  most recent  audited
         financial  statements) for which LabOne or any of its  Subsidiaries may
         be liable,  except  with  respect to Taxes  covered by the Tax  Sharing
         Agreement,  (C) established  reserves that are required by GAAP for the
         payment  of all  Taxes  not yet due and  payable  with  respect  to the
         results of operations of LabOne and its  Subsidiaries  through the date
         hereof,  and (D) complied in all material  respects with all applicable
         laws,  rules and  regulations  relating to the withholding of Taxes and
         has in all material  respects  timely  withheld from employee wages and
         paid over to the proper  governmental  authorities all amounts required
         to be so withheld and paid over.

                  (ii) Except as listed in Schedule 3.1(l) of the LabOne Letter,
         and except with  respect to Returns  files by Holdings  pursuant to the
         Tax  Sharing  Agreement,  (A)  there is no audit or  examination  being
         conducted by any tax authority  with respect to any Return of LabOne or
         any of its  Subsidiaries and (B) no extension or waiver of a statute of
         limitation  regarding  liability  for Taxes or the filing of any Return
         has been given or agreed to by LabOne or any of its  Subsidiaries  that
         has the effect of keeping  open a  statutory  limitations  period  that
         would otherwise now be closed.  Except to the extent being contested in
         good  faith  and  as   disclosed   in  Schedule   3.1(l),all   material
         deficiencies  for Taxes asserted as a result of an audit or examination
         conducted by any taxing  authority with respect to any Return of LabOne
         or  any of  its  Subsidiaries  have  been  paid  or  provided  for,  in
         accordance  with  GAAP,  in  LabOne's  most  recent  audited  financial
         statements  included  in the LabOne SEC  documents.  Except as provided
         for, in accordance with GAAP, in LabOne's most recent audited financial
         statements  included in the LabOne SEC  documents  and as  disclosed in
         Schedule  3.1(l) and except with  respect to Returns  filed by Holdings
         pursuant to the Tax Sharing Agreement,  no material  deficiency for any
         such Taxes has been proposed,  asserted,  or assessed against LabOne or
         any of its Subsidiaries by any federal,  state, local, foreign or other
         taxing authority with respect to any period.  Neither LabOne nor any of
         its  Subsidiaries  is a party to an  agreement  that  provides  for the
         payment  of any  amount  that would  constitute  an  "excess  parachute
         payment" within the meaning of Section 280G of the Code.

                  (iii) Neither  LabOne nor any of its  Subsidiaries  is a party
         to,  is  bound  by or has  any  obligation  under  any tax  sharing  or
         allocation  agreement or similar  agreement or arrangement,  except for
         that certain Tax Sharing  Agreement among Holdings,  LabOne and certain
         other parties dated August 1, 1990 (the "Tax Sharing  Agreement").  All
         of the information  that has heretofore been furnished by LabOne or any
         of its Subsidiaries to Holdings relating to Taxes, in connection


                                       18

<PAGE>
         with the preparation of a consolidated  tax return of the  consolidated
         group  composed of Holdings and its  subsidiaries,  was when  delivered
         true, accurate,  and complete,  in all material respects,  (and, to the
         extent  that  such  information  reflected  liability  for Taxes or any
         component of such liability (such as the amount of income or deductions
         for a taxable period), such information was prepared in accordance with
         the  applicable  law relating to such Taxes or other  items),  and each
         item of such  information  is now believed by LabOne to have been true,
         accurate,  and  complete,  in all  material  respects,  as of the  date
         thereof.  All payments that are required to have been made prior to the
         date hereof by LabOne or any of its  Subsidiaries to Holdings  pursuant
         to the Tax Sharing  Agreement have been made, and any payments that are
         required to be made with  respect to periods  prior to the date hereof,
         but not due until a date  subsequent to the date hereof,  are disclosed
         in Schedule 3.1(l) and LabOne and each of its Subsidiaries has complied
         in all  material  respects  with  all  provisions  of the  Tax  Sharing
         Agreement that are applicable to it.

         For  purposes of this  Agreement,  "Taxes"  means all  federal,  state,
local, foreign and other taxes, charges, fees, levies, imposts, duties, licenses
or  other  governmental  assessments,  together  with any  interest,  penalties,
additions to tax or  additional  amounts  imposed by any taxing  authority  with
respect thereto.

         (m)      Pension and Benefit Plans; ERISA.

                  (i) LabOne has made available to Holdings true,  correct,  and
         complete copies of each of the following which is sponsored, maintained
         or contributed to by LabOne or any of its  Subsidiaries for the benefit
         of the employees of LabOne or such Subsidiary:

                           (1) each  "employee  benefit  plan,"  as such term is
                  defined  in  Section  3(3)  of  the  United  States   Employee
                  Retirement  Income Security Act of 1974, as amended  ("ERISA")
                  (including,  but not limited to, employee benefit plans,  such
                  as foreign  plans,  which are not subject to the provisions of
                  ERISA) ("LabOne Plans"); and

                           (2)  each  personnel   policy,   stock  option  plan,
                  collective  bargaining  agreement,  bonus plan or arrangement,
                  incentive   award  plan  or  arrangement,   vacation   policy,
                  severance pay plan, policy or agreement, deferred compensation
                  agreement   or   arrangement,    executive   compensation   or
                  supplemental   income   arrangement,   consulting   agreement,
                  employment  agreement  and each other  employee  benefit plan,
                  agreement,  arrangement,  program,  practice or  understanding
                  which  is  not  described  in  Section  3.1(m)(i)(1)  ("LabOne
                  Benefit Programs").


                                       19

<PAGE>
                  (ii)  Except as  disclosed  in Schedule  3.1(m)(ii)  of LabOne
Letter:

                           (1) LabOne and its  Subsidiaries do not contribute to
                  or have an obligation  to  contribute  to, and have not at any
                  time within six years prior to the Effective Time  contributed
                  to or had an  obligation to  contribute  to, a multi  employer
                  plan within the meaning of Section 3(37) of ERISA;

                           (2) LabOne and its  Subsidiaries  have  substantially
                  performed  all  material   obligations,   whether  arising  by
                  operation of law or by  contract,  required to be performed by
                  them in  connection  with  LabOne  Plans  and  LabOne  Benefit
                  Programs,  and to the  knowledge  of LabOne there have been no
                  defaults  or  violations  by any other  party under the LabOne
                  Plans or LabOne  Benefit  Programs  that  would  have a LabOne
                  Material Adverse Effect;

                           (3) All  reports and  disclosures  relating to LabOne
                  Plans  required to be filed with or furnished to  governmental
                  agencies,  LabOne Plan participants or beneficiaries have been
                  filed or furnished substantially in accordance with applicable
                  law in a timely  manner,  except  where the  failure  to do so
                  would not have a LabOne Material Adverse Effect;

                           (4) Each LabOne Plan  intended to be qualified  under
                  Section 401 of the Code  satisfies  the  requirements  of such
                  Section and has received a favorable determination letter from
                  the Internal  Revenue Service  regarding such qualified status
                  and has  not,  since  receipt  of the  most  recent  favorable
                  determination  letter,  been  amended or, to the  knowledge of
                  LabOne,  operated, in a way which would reasonably be expected
                  to materially  adversely affect such qualified  status.  As to
                  any LabOne Plan intended to be qualified  under Section 401 of
                  the Code, there has been no termination or partial termination
                  of such LabOne Plan within the meaning of Section 411(d)(3) of
                  the Code;

                           (5) There  are no  actions,  suits or claims  pending
                  (other than routine  claims for benefits) or, to the knowledge
                  of LabOne,  threatened against, or with respect to, any of the
                  LabOne Plans or LabOne  Benefit  Programs or their assets that
                  could  reasonably  be  expected  to  have a  Material  Adverse
                  Effect. To the knowledge of LabOne, there is no matter pending
                  (other than routine qualification  determination filings) with
                  respect to any of the LabOne Plans before the Internal Revenue
                  Service ("IRS"),  the United States Department of Labor or the
                  Pension Benefit Guaranty Corporation ("PBGC");



                                       20

<PAGE>
                           (6)      There are no LabOne Plans subject to Title
                                    IV of ERISA.;

                           (7) No act,  omission  or  transaction  has  occurred
                  which  would  result  in  imposition  on  LabOne or any of its
                  Subsidiaries  of (A) liability for a breach of fiduciary  duty
                  under  Section  409 of  ERISA,  (B) a civil  penalty  assessed
                  pursuant to subsection (c), (i) or (1) of Section 502 of ERISA
                  or (C) a tax  imposed  pursuant to Chapter 43 of Subtitle D of
                  the Code that, in any such case,  could reasonably be expected
                  to have a LabOne Material Adverse Effect;

                           (8) With respect to any employee benefit plan, within
                  the  meaning of Section  3(3) of ERISA,  which is not a LabOne
                  Plan but which is sponsored,  maintained or contributed to, or
                  has been  sponsored,  maintained or  contributed to within six
                  years prior to the Effective Time, by any corporation,  trade,
                  business  or entity  that is a  Subsidiary  of LabOne,  (A) no
                  withdrawal  liability,  within the meaning of Section  4201 of
                  ERISA, has been incurred,  which withdrawal  liability has not
                  been satisfied, (B) no liability to the PBGC has been incurred
                  by any  Subsidiary  of LabOne,  which  liability  has not been
                  satisfied,  (C) no accumulated funding deficiency,  whether or
                  not  waived,  within the  meaning  of Section  302 of ERISA or
                  Section  412 of the  Code  has  been  incurred,  and  (D)  all
                  contributions  (including  installments) to such plan required
                  by Section  302 of ERISA and Section 412 of the Code have been
                  timely made; and

                           (9) After taking into  account all consents  obtained
                  from  participants in LabOne Plans and LabOne Benefit Programs
                  referred to in Schedule 3.1(m),  the execution and delivery of
                  this  Agreement  and  the  consummation  of  the  transactions
                  contemplated  hereby will not (A) require LabOne or any of its
                  Subsidiaries to make a larger  contribution to, or pay greater
                  benefits under, any LabOne Plan or LabOne Benefit Program than
                  it otherwise  would, (B) create or give rise to any additional
                  or  accelerated  vested  rights or service  credits  under any
                  LabOne Plan or LabOne Benefit  Program,  or (C) accelerate the
                  vesting,  accrual or  exercisability of any benefits or rights
                  under any LabOne Plan or LabOne  Benefit  Program,  including,
                  without  limitation,  acceleration  of the date on  which  any
                  stock option(s) may first be exercised.


                  (iii) Except as disclosed  on Schedule  3.1(m)(iii)  of LabOne
         Letter,  there are no severance  agreements  or  employment  agreements
         between LabOne or any of its Subsidiaries and any employee of LabOne or
         such  Subsidiary.  True and correct  copies of all such  severance  and
         employment  agreements  have  been  provided  to  Holdings.  Except  as
         disclosed on Schedule 3.1(m)(iii) of LabOne


                                       21
<PAGE>
         Letter,  (A)  neither  LabOne  nor  any of  its  Subsidiaries  has  any
         consulting  agreement or arrangement  with any person  involving annual
         compensation  in excess of $100,000,  except as are terminable  without
         penalty  upon one  month's  notice  or less,  and (B) no stock or other
         security  issued  by  LabOne  or any of its  Subsidiaries  forms or has
         formed a  material  part of the  assets  of any  LabOne  Plan or LabOne
         Benefit Program.

         (n)      Labor Matters.

                  (i)  Except  as set  forth in  Schedule  3.1(n)(i)  of  LabOne
         Letter, as of the date of this Agreement, (1) no employees of LabOne or
         any of its Subsidiaries are represented by any labor organization;  (2)
         no labor  organization  or group of  employees  of LabOne or any of its
         Subsidiaries  has  made  a  pending  written  demand  or,  to  LabOne's
         knowledge, other form of demand, for recognition or certification,  and
         there are no representation  or certification  proceedings or petitions
         seeking a representation  proceeding presently pending or threatened in
         writing to be brought or filed with the National Labor  Relations Board
         or any other  labor  relations  tribunal or  authority;  and (3) to the
         knowledge  of  LabOne,  there are no  organizing  activities  involving
         LabOne or any of its Subsidiaries  pending with any labor  organization
         or group of employees of LabOne or any of its Subsidiaries.

                  (ii)  Except as set  forth on  Schedule  3.1(n)(ii)  of LabOne
         Letter,  LabOne and each of its  Subsidiaries is in compliance with all
         applicable  employment and labor laws and  regulations  relating to the
         employment  of labor,  including  all such laws and orders  relating to
         wages,  hours,  collective  bargaining,  discrimination,  civil rights,
         safety and health workers'  compensation and the collection and payment
         of withholding  and/or Social Security Taxes and similar Taxes,  except
         where the failure to comply  would not have a LabOne  Material  Adverse
         Effect.

         (o)  Intangible  Property.  To  LabOne's  knowledge,   LabOne  and  its
Subsidiaries  possess or have  adequate  rights to use all material  trademarks,
trade  names,  patents,  service  marks,  brand  marks,  brand  names,  computer
programs,   database,   industrial  designs,  trade  secrets,   technology,  and
copyrights  necessary for the operation of the  businesses of each of LabOne and
its Subsidiaries (collectively,  the "LabOne Intangible Property"), except where
the failure to possess or have adequate rights to use such properties  would not
reasonably be expected to have a LabOne Material Adverse Effect. Schedule 3.1(o)
of LabOne  Letter lists all material  patents and trademark  registrations  (and
applications for patents and trademark  registrations)  or licensing  agreements
that are  applicable  to a  material  portion of the  business  of LabOne or its
Subsidiaries. To the knowledge of LabOne, except as set forth on Schedule 3.1(o)
of LabOne Letter,  all of LabOne Intangible  Property is owned or used by LabOne
or its Subsidiaries free and clear of any and all liens, claims or encumbrances,
except those that are not reasonably  likely to have a LabOne  Material  Adverse
Effect, and neither LabOne nor any such Subsidiary


                                       22

<PAGE>
has forfeited or otherwise  relinquished  any LabOne  Intangible  Property which
forfeiture would result in a LabOne Material Adverse Effect. To the knowledge of
LabOne, the use of LabOne Intangible Property by LabOne or its Subsidiaries does
not, in any material respect, conflict with, infringe upon, violate or interfere
with or  constitute  an  appropriation  of any valid right,  title,  interest or
goodwill,  including,  without  limitation,  any  intellectual  property  right,
trademark,  trade name, patent,  service mark, brand mark, brand name,  computer
program,  database,  industrial  design,  copyright  or any pending  application
therefor  of any other  person and there have been no claims  made,  and neither
LabOne  nor any of its  Subsidiaries  has  received  any  notice of any claim or
otherwise knows, that any of LabOne Intangible  Property is invalid or conflicts
with the asserted rights of any other person or has not been used or enforced or
has been  failed to be used or  enforced  in a manner  that would  result in the
abandonment,  cancellation  or  unenforceability  of  any of  LabOne  Intangible
Property, except for any such conflict, infringement,  violation,  interference,
claim, invalidity, abandonment,  cancellation or unenforceability that would not
reasonably be expected to have a LabOne Material Adverse Effect.

         (p)      Environmental Matters.

                  For purposes of this Agreement:

                           (A)  "Environmental  Law"  means any  applicable  law
                  regulating  or  prohibiting  Releases  into  any  part  of the
                  natural  environment,  or  pertaining  to  the  protection  of
                  natural  resources,  the  environment  and public and employee
                  health  and  safety   including,   without   limitation,   the
                  Comprehensive   Environmental  Response,   Compensation,   and
                  Liability Act ("CERCLA") (42 U.S.C. Section 9601 et seq.), the
                  Hazardous  Materials  Transportation  Act (49 U. S. C. Section
                  1801 et seq.), the Resource  Conservation and Recovery Act (42
                  U.S.C.  Section 6901 et seq.),  the Clean Water Act (33 U.S.C.
                  Section  1251 et seq.),  the Clean Air Act (33 U.S.C.  Section
                  7401 et seq.),  the Toxic  Substances  Control  Act (15 U.S.C.
                  Section 7401 et seq.), the Federal Insecticide, Fungicide, and
                  Rodenticide  Act (7  U.S.C.  Section  136 et  seq.),  and  the
                  Occupational  Safety and Health Act (29 U.S.C.  Section 651 et
                  seq.)  ("OSHA")  and  the  regulations   promulgated  pursuant
                  thereto, and any such applicable state or local statutes,  and
                  the regulations  promulgated  pursuant  thereto,  as such laws
                  have  been and may be  amended  or  supplemented  through  the
                  Closing Date;

                           (B)   "Hazardous   Material"   means  any  substance,
                  material  or waste which is  regulated,  or which could be the
                  subject of Remedial Action,  pursuant to any Environmental Law
                  by any public or governmental  authority in the  jurisdictions
                  in which the  applicable  party or its  Subsidiaries  conducts
                  business, or the United States, including, without limitation,
                  any material or substance which is defined as a "hazardous


                                       23

<PAGE>
                  waste,"   "hazardous   material,"    "hazardous    substance,"
                  ("extremely  hazardous waste" or "restricted hazardous waste,"
                  "pollutant,"   "contaminants,"   "toxic   waste"   or   "toxic
                  substance" under any provision of Environmental Law;

                           (C)  "Release"  means any release,  spill,  effluent,
                  emission,  leaking,  pumping,  injection,  deposit,  disposal,
                  discharge,  dispersal,  leaching or  migration  of a regulated
                  quantity of Hazardous  Material into the outdoor  environment,
                  or into or out of any  property  owned,  operated or leased by
                  the applicable party or its Subsidiaries; and

                           (D) "Remedial  Action" means all actions with respect
                  to a regulated  quantity of  Hazardous  Materials,  including,
                  without limitation,  any capital  expenditures,  required by a
                  governmental  entity or required under any Environmental  Law,
                  or voluntarily  undertaken to (I) clean up, remove,  treat, or
                  in any other  way  ameliorate  the  Release  of any  Hazardous
                  Materials in the outdoor environment; (II) prevent the Release
                  or threat of Release,  or minimize the further  Release of any
                  Hazardous  Material  so it does not  endanger  or  threaten to
                  endanger the public health or welfare of the indoor or outdoor
                  environment;    (III)   perform   pre-remedial   studies   and
                  investigations or post-remedial monitoring and care pertaining
                  or relating to a Release;  or (IV) bring the applicable  party
                  into compliance with any Environmental Law.

                  (i) Except as disclosed on Schedule  3.1(p) of LabOne  Letter,
         the  operations  of  LabOne  and its  Subsidiaries  have  been  and are
         currently in compliance with all  Environmental  Laws, except where the
         failure to so comply would not  reasonably be expected to have a LabOne
         Material Adverse Effect.

                  (ii) Except as disclosed on Schedule  3.1(p) of LabOne Letter,
         LabOne and its  Subsidiaries  have obtained and  maintained all permits
         required  under  applicable   Environmental   Laws  for  the  continued
         operations of their respective businesses, except such permits the lack
         of which would not  reasonably  be  expected to have a LabOne  Material
         Adverse Effect.

                  (iii) Except as disclosed on Schedule 3.1(p) of LabOne Letter,
         as of the date hereof  LabOne and its  Subsidiaries  are not subject to
         any material  (individually  or in the aggregate)  outstanding  written
         orders or  material  contracts  with any  Governmental  Entity or other
         person  respecting (A)  Environmental  Laws, (B) Remedial Action or (C)
         any Release or threatened Release of a Hazardous Material.


                                       24

<PAGE>
                  (iv) Except as disclosed on Schedule  3.1(p) of LabOne Letter,
         LabOne and its Subsidiaries have not received any written communication
         alleging,  with respect to any such party,  and has no knowledge of the
         violation of or liability under any Environmental  Law, which violation
         or liability  would  reasonably  be expected to have a LabOne  Material
         Adverse Effect.

                  (v) Except as disclosed on Schedule  3.1(p) of LabOne  Letter,
         neither LabOne nor any of its Subsidiaries has any contingent liability
         in  connection  with any Release of any Hazardous  Material  including,
         without  limitation,  in connection  with the exposure of any person or
         property to Hazardous  Material  that would  reasonably  be expected to
         have a LabOne Material Adverse Effect.

                  (vi) Except as disclosed on Schedule  3.1(p) of LabOne Letter,
         the operations of LabOne or its Subsidiaries  involving the generation,
         transportation,  treatment,  storage or disposal of hazardous waste, as
         defined and  regulated  under 40 C.F.R.  Parts 260-270 (in effect as of
         the date of this  Agreement)  or any  state  equivalent,  or any  other
         Hazardous  Material are in  compliance  with  applicable  Environmental
         Laws,  except  where the failure to so comply would not  reasonably  be
         expected to have a LabOne Material Adverse Effect.

                  (vii) Except as disclosed on Schedule 3.1(p) of LabOne Letter,
         to the  knowledge of LabOne as of the date hereof,  there is not now on
         or in any property of LabOne or its  Subsidiaries any of the following:
         (A) any  underground  storage  tanks or surface  impoundments,  (B) any
         asbestos-containing  materials,  or (C) any polychlorinated  biphenyls,
         any of which ((A), (B) or (C) preceding)  could  reasonably be expected
         to have a LabOne Material Adverse Effect. To the knowledge of LabOne as
         of the date hereof,  none of the properties owned or operated by LabOne
         are restricted as to use or as to transfer of title,  or the subject of
         any special recorded notice, under any Environmental Law.

                  (viii)  LabOne has made  available  to Holdings for review all
         written reports of  environmental  audits and assessments  prepared for
         LabOne or any of its Subsidiaries  within the last three years by third
         party consultants or internal environmental, safety or health personnel
         which are in the  possession  or control of LabOne and which  relate to
         the assets or operations of LabOne or any of its Subsidiaries.

         (q) Opinion of Financial  Advisor.  The Special  Committee has received
the  opinion  of  U.S.  Bancorp  Piper Jaffray,  Inc. (a copy of  which  will be
delivered  to  Holdings), to  the  effect  that,  as  of  the  date  hereof, the
consideration  to be received by the holders of LabOne Common Stock,  other than
Holdings,  officers and  directors  of  Holdings  and  beneficial owners of  10%
or  more  of  the  outstanding  shares of  Holdings Common  Stock (such  holders
after  such  exclusions are  referred  to as "Unaffiliated  LabOne Stockholders)


                                       25

<PAGE>
pursuant  to  this  Agreement  is fair  from a  financial  point  of view to the
Unaffiliated LabOne Stockholders.

         (r) Vote Required. Except as provided in the second sentence of Section
6.1(a)(i) of this Agreement,  the affirmative  vote of the holders of a majority
of the shares of LabOne Common Stock outstanding is the only vote of the holders
of any class or series  of  LabOne  capital  stock  necessary  to  approve  this
Agreement and the transactions contemplated hereby.

         (s) Insurance.  LabOne has delivered to Holdings an insurance  schedule
of LabOne's and each of its Subsidiaries' (i) directors' and officers' liability
insurance,  and (ii) primary and excess casualty insurance  policies,  providing
coverage  for bodily  injury and  property  damage to third  parties,  including
products liability and completed operations coverage, and worker's compensation,
in each  case in  effect  as of the  date  hereof.  LabOne  maintains  insurance
coverage  reasonably  adequate  for the  operation of the business of LabOne and
each of its Subsidiaries  (taking into account the cost and availability of such
insurance),  and  the  transactions  contemplated  hereby  will  not  materially
adversely affect such coverage.

         (t) Brokers.  Except as disclosed on Schedule  3.1(t) of LabOne Letter,
no broker,  investment  banker,  or other  person is entitled  to any  broker's,
finder's or other similar fee or commission in connection with the  transactions
contemplated by this Agreement based upon  arrangements  made by or on behalf of
LabOne.

         (u) Title. Except as disclosed in financial  statements included in the
LabOne SEC Documents or on Schedule 3.1(u) of LabOne Letter,  LabOne and each of
its  Subsidiaries  have good and marketable  title to all real property and good
title to all personal property owned by them, in each case free and clear of all
liens,  pledges or encumbrances  securing money borrowed,  the deferred purchase
price of property in excess of $300,000 or capital  leases and free and clear of
all other liens, pledges, encumbrances or defects that could affect the value or
use thereof,  except for any such other liens, pledges,  encumbrances or defects
that would not have a LabOne Material Adverse Effect.

         (v) Books and Records.  LabOne and its  Subsidiaries  (i) make and keep
accurate books and records and (ii) maintain internal  accounting controls which
provide  reasonable  assurance that (A)  transactions are executed in accordance
with management's  authorization,  (B) transactions are recorded as necessary to
permit preparation of their financial statements and to maintain  accountability
for their  assets,  (C) access to their assets is permitted  only in  accordance
with management's  authorization and (D) the reported  accountability  for their
assets is compared with existing assets at reasonable intervals,  except for any
inaccuracy or  inadequacy  of controls that would not  reasonably be expected to
have a LabOne Material Adverse Effect.


                                       26

<PAGE>
         (w) Certain Payments.  Neither LabOne nor any of its Subsidiaries,  nor
any director, officer, agent, employee or other person associated with or acting
on behalf of the LabOne or any of its Subsidiaries, has used any corporate funds
for any unlawful  contribution,  gift,  entertainment  or other unlawful expense
relating to political activity;  made any direct or indirect unlawful payment to
any foreign or domestic  governmental official or employee from corporate funds;
violated  or is in  violation  of any  provision  of the United  States  Foreign
Corrupt  Practices  Act of 1977;  nor made any illegal  bribe,  rebate,  payoff,
influence  payment,  kickback  or other  unlawful  payment,  except for any such
expenses, payments or violations that would not reasonably be expected to have a
LabOne Material Adverse Effect.

         (x) Transactions with Related Parties.  Except as set forth in Schedule
3.1(x) of LabOne Letter or in the LabOne SEC Documents, there are no agreements,
contracts or other  arrangements  between (i) LabOne or any of its Subsidiaries,
on the one hand, and (ii) any Related  Person (as defined  below) of LabOne,  on
the other  hand.  Except as set forth in  Schedule  3.1(x) of LabOne  Letter and
except for the  ownership  of the  Surviving  Corporation  Common  Stock  issued
hereunder,  as of the  Closing  Date no Related  Person of LabOne and no present
officer or director of any Related  Person of LabOne  shall have any interest in
any property  (real or personal,  tangible or intangible) or contract used in or
pertaining  to the  business of LabOne and its  Subsidiaries  (or the  Surviving
Corporation and its Subsidiaries) and no Related Person of LabOne shall have any
direct or indirect ownership interest (excluding immaterial passive investments)
in any person (other than through LabOne or any of its Subsidiaries)  with which
LabOne or any of its  Subsidiaries  competes  in any  material  respect or has a
material  business  relationship.  Other than those  services  described  in the
LabOne SEC Documents, Schedule 3.1(x) of LabOne letter sets forth as of the date
of this Agreement a description  of all services  provided by any Related Person
of LabOne or LabOne  and any of its  Subsidiaries.  A  "Related  Person"  of any
person shall mean any holder of in excess of 5% of the equity securities of such
person and any  affiliates  or  associates  (as  defined in Rule 12b-2 under the
Exchange  Act)  of  such  holder  (other  than  such  original   person  or  its
Subsidiaries).

         (y) State  Takeover  Laws.  LabOne  has taken all  necessary  action to
exempt the  transactions  contemplated  by this Agreement from the provisions of
Section 203 of the Delaware Law.

         (z) Nature of Election by Certain Affiliates.  Each of William D. Grant
and W. Thomas Grant II has represented to LabOne that he intends to make a Stock
Election  with respect to any shares of LabOne  Common Stock that he owns at the
Effective Time.

         3.2 Representations and Warranties of Holdings. Holdings represents and
warrants to LabOne as follows:


                                       27

<PAGE>
         (a)  Organization,  Standing and Power.  Holdings is a corporation duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction of the State of Missouri,  has all requisite power and authority to
own,  lease and operate its properties and to carry on its business as now being
conducted,  and is duly  qualified  and in good  standing to do business in each
jurisdiction in which the business it is conducting, or the operation, ownership
or leasing of its properties,  makes such qualification necessary, other than in
such  jurisdictions  where the  failure  to  qualify  would not have a  Holdings
Material Adverse Effect (as defined below). Holdings has heretofore delivered to
LabOne complete and correct copies of Holdings's  Articles of Incorporation  and
Bylaws.  As  used  in this  Agreement  "Holdings  Material  Adverse  Effect"  or
"Holdings  Material  Adverse  Change"  shall mean any effect or change  that is,
individually  or  in  the  aggregate,   materially   adverse  to  the  business,
operations,  assets,  condition (financial or otherwise) or results of operation
of Holdings except for general  economic changes and changes that may affect the
industries of Holdings generally.

         (b) Capital  Structure.  As of the date hereof,  the authorized capital
stock of Holdings  consists of 24,000,000  shares of Holdings Common Stock,  par
value $1.00 per share,  and 3,000,000 shares of preferred stock, par value $1.00
per share  ("Holdings  Preferred  Stock").  At the close of business on the date
hereof:   (i)  6,489,103   shares  of  Holdings  Common  Stock  are  issued  and
outstanding, an aggregate of 90,000 shares of Holdings Common Stock are reserved
for issuance  pursuant to the  Holdings  Stock  Option  Plan,  40,000  shares of
Holdings  Common Stock are issuable  pursuant to outstanding  and unvested stock
options granted  pursuant to the Holdings Stock Option Plan and 20,000 shares of
Holdings  Common Stock are  issuable  pursuant to  outstanding  and vested stock
options  granted  pursuant to the Holdings Stock Option Plan;  (ii) no shares of
Holdings  Preferred  Stock  are  issued  and  outstanding;  and  (iii) no bonds,
debentures, notes or other indebtedness having the right to vote (or convertible
into  securities  having  the right to vote) on any  matters  on which  Holdings
stockholders may vote ("Holdings  Voting Debt") are issued or outstanding.  From
the date hereof until the  Effective  Time,  no  additional  shares,  options or
similar  rights  will be  issued  or  authorized  other  than  shares  issued in
connection  with  options  which were  outstanding  and vested (or which vest in
accordance  with their  original  terms as in effect on the close of business on
the date hereof ) pursuant to the Holdings Stock Option Plan as in effect on the
close of business on the date hereof.  Assuming the  Effective  Date is prior to
July 31, 1999, no options or similar rights that were not vested at the close of
business on the date hereof will vest prior to the Effective Time (other than in
the case of the death of a holder of such option or as otherwise provided in the
Holdings Stock Option Plan).  All  outstanding  shares of Holdings  Common Stock
have been duly authorized,  are validly issued, fully paid and nonassessable and
are not  subject to  preemptive  rights,  and,  subject to the  approval of this
Agreement  and the Merger,  all shares of  Surviving  Corporation  Common  Stock
issuable in the Merger will be duly authorized and, when issued, will be validly
issued,  fully paid and non-assessable and free of preemptive rights.  Except as
set forth on Schedule  3.2(b) of the letter dated and delivered to LabOne on the
date hereof (the "Holdings Letter"), which relates to this


                                       28

<PAGE>
Agreement  and  is  designated   therein  as  being  the  Holdings  Letter,  all
outstanding  shares of capital  stock of LabOne that are owned by  Holdings  are
free and clear of all liens,  charges,  encumbrances,  claims and options of any
nature.  Except as set forth in this Section 3.2(b) or on Schedule 3.2(b) of the
Holdings  Letter and except for changes  resulting from the exercise of employee
stock options  outstanding on the date hereof  granted  pursuant to the Holdings
Stock Option Plan, or as contemplated  by this Agreement there are  outstanding:
(i) no shares of capital stock,  Holdings Voting Debt or other voting securities
of Holdings; (ii) no securities of Holdings convertible into or exchangeable for
shares of capital  stock,  Holdings  Voting Debt or other voting  securities  of
Holdings;  and (iii) no options,  warrants,  calls, rights (including preemptive
rights),  commitments  or agreements to which Holdings is a party or by which it
is bound in any case  obligating  Holdings to issue,  deliver,  sell,  purchase,
redeem or acquire, or cause to be issued, delivered,  sold, purchased,  redeemed
or acquired,  additional  shares of capital stock or any Holdings Voting Debt or
other voting securities of Holdings,  or obligating Holdings to grant, extend or
enter into any such option,  warrant,  call,  right,  commitment  or  agreement.
Except as set forth on  Schedule  3.2(b) of the  Holdings  Letter,  there are no
stockholder  agreements,  registration  rights,  voting  trusts or other similar
agreements  or  understandings  to which  Holdings  is a party or by which it is
bound. Except as set forth on Schedule 3.2(b) of the Holdings Letter,  there are
no  restrictions  on  Holdings's  ability  to vote the stock of  LabOne  held by
Holdings. To the knowledge of Holdings, as of the date of this Agreement, except
for  William D.  Grant,  Wallace R. Weitz & Company  and a group  consisting  of
American  Century  Investment  Management,  Inc.  and American  Century  Capital
Portfolios,  Inc., no  stockholder  of Holdings or "group" within the meaning of
Section  13(d)(3) of the Exchange Act will be  immediately  after the  Effective
Time the  beneficial  owner of more than 10% of the then  outstanding  Surviving
Corporation Common Stock.

         (c) Non-Subsidiaries  Equity Investment.  Holdings has no Subsidiaries.
Schedule  3.2(c)  of the  Holdings  Letter  sets  forth  the book  value of each
investment by Holdings in the voting securities,  partnership interests or other
equity  interests of any  corporation,  partnership  or other entity (other than
LabOne  and its  Subsidiaries)  and the  nature  and  percentage  of  Holdings's
ownership  interests in such investment.  Except as set forth in Schedule 3.2(c)
of the Holdings Letter,  the voting securities,  partnership  interests or other
equity interests of Holdings in such investments are owned free and clear of all
liens,  charges and  encumbrances  and none of such  entities is a Subsidiary of
Holdings.

         (d)      Authority; No Violations; Consents and Approvals.

                  (i) The Board of Directors of Holdings has, by unanimous  vote
         of the directors,  approved and declared to be in the best interests of
         the stockholders of Holdings the Articles Amendment (as defined below),
         the Merger,  this Agreement and the amendments to the Existing Articles
         of  Incorporation  and  Existing  Bylaws of  Holdings  provided  in the
         Certificate of Merger. Holdings has all requisite


                                       29

<PAGE>
         corporate  power  and  authority  to enter  into  this  Agreement  and,
         subject, with respect to consummation of the Merger, to approval of the
         amendment to Holdings's  Articles of Incorporation set forth in Exhibit
         E (the "Articles  Amendment") and to approval of this Agreement and the
         Merger by the  stockholders of Holdings in accordance with the Missouri
         Law, to consummate the transactions  contemplated hereby. The execution
         and delivery of this Agreement and the consummation of the transactions
         contemplated   hereby  have  been  duly  authorized  by  all  necessary
         corporate  action on the part of Holdings,  subject to approval of this
         Agreement and the Merger by the  stockholders of Holdings in accordance
         with the  Missouri  Law.  This  Agreement  has been duly  executed  and
         delivered by Holdings and, subject, with respect to consummation of the
         Merger,  to approval of the Articles  Amendment and to approval of this
         Agreement and the Merger by the  stockholders of Holdings in accordance
         with the Missouri Law, and,  assuming this  Agreement  constitutes  the
         valid and binding obligation of LabOne, constitutes a valid and binding
         obligation of Holdings enforceable in accordance with its terms, except
         to the extent that the  enforcement of this Agreement may be limited by
         (i) bankruptcy, insolvency, reorganization, moratorium or other similar
         laws  now  or  hereafter  in  effect  relating  to  creditors'   rights
         generally,  and (ii) general principles of equity regardless of whether
         enforceability is considered in a proceeding in equity or at law.

                  (ii)  Except as set forth on Schedule  3.2(d) of the  Holdings
         Letter,  the execution and delivery of this Agreement does not, and the
         consummation  of the  transactions  contemplated  hereby and compliance
         with the  provisions  hereof will not,  conflict with, or result in any
         violation of, or default  (with or without  notice or lapse of time, or
         both) under,  or give rise to a right of  termination,  cancellation or
         acceleration  of any  obligation  or to the loss of a material  benefit
         under, or result in the creation of any lien, security interest, charge
         or encumbrance  upon any of the properties or assets of Holdings under,
         any  provision  of (i) the  Articles  of  Incorporation  or  Bylaws  of
         Holdings,  (ii) any loan or credit agreement,  note, bond, mortgage, or
         indenture   applicable   to  Holdings,   (iii)  any  other   agreement,
         instrument,  permit,  concession,  franchise or license  applicable  to
         Holdings or (iv) assuming the consents,  approvals,  authorizations  or
         permits and filings or notifications referred to in Section 3.2(d)(iii)
         are duly and timely obtained or made and the approval of this Agreement
         and the Merger by the  stockholders  of Holdings  has been  obtained in
         accordance  with Missouri Law, any judgment,  order,  decree,  statute,
         law, ordinance, rule or regulation applicable to Holdings or any of its
         properties or assets, other than, in the case of clause (iii), any such
         conflicts,  violations,  defaults,  rights,  liens, security interests,
         charges or encumbrances that,  individually or in the aggregate,  would
         not have a Holdings  Material  Adverse  Effect,  materially  impair the
         ability of Holdings to perform its obligations hereunder or prevent the
         consummation of any of the transactions contemplated hereby.


                                       30

<PAGE>
                  (iii) No  consent,  approval,  order or  authorization  of, or
         registration,   declaration   or  filing  with,   or  permit  from  any
         Governmental  Entity is  required  by or with  respect to  Holdings  in
         connection  with  the  execution  and  delivery  of this  Agreement  by
         Holdings  or  the   consummation   by  Holdings  of  the   transactions
         contemplated  hereby,  as to which the  failure to obtain or make would
         have a Holdings  Material  Adverse  Effect,  except for: (A) the filing
         with the SEC of a proxy  statement in preliminary  and definitive  form
         relating  to the  meeting  of  Holdings's  stockholders  to be  held in
         connection  with the  approval  of this  Agreement  and the  Merger  by
         stockholders of Holdings,  the S-4, such reports under Section 13(a) of
         the Exchange Act and such other  compliance with the Securities Act and
         the Exchange  Act and the rules and  regulations  thereunder  as may be
         required  in  connection  with  this  Agreement  and  the  transactions
         contemplated  hereby,  and the obtaining from the SEC of such orders as
         may be so required; (B) filings with, and approval of, the Nasdaq Stock
         Market;  (C) such  filings  and  approvals  as may be  required  by any
         applicable   state   securities,   "blue  sky"  or  takeover  laws,  or
         environmental  laws; and (D) the filing of the  Certificate or Articles
         of Merger with the  Secretary  of State of the States of  Delaware  and
         Missouri.

         (e) SEC  Documents.  Holdings  has made  available to LabOne a true and
complete copy of each quarterly,  annual or current report on Form 10-Q, 10-K or
8-K,  registration  statement and definitive  proxy  statement filed by Holdings
with the SEC since  January 1, 1994,  which are all the  documents  (other  than
preliminary  material)  that  Holdings  was  required to file with the SEC since
January 1, 1994.  Holdings  will make  available to LabOne,  a true and complete
copy of each  quarterly,  annual or current  report on Form  10-Q,  10-K or 8-K,
registration statement and definitive proxy statement filed by Holdings with the
SEC  subsequent to the date of this  Agreement and prior to the Effective  Time.
All of such reports and statements filed prior to the date of this Agreement are
hereinafter  referred to as the "Holdings SEC Documents." As of their respective
filing dates (or if amended or  superseded by a filing prior to the date hereof,
then on the date of such  filing),  the Holdings SEC  Documents  complied in all
material  respects with the  requirements  of the Securities Act or the Exchange
Act,  as the case may be, and the rules and  regulations  of the SEC  thereunder
applicable  to such  Holdings  SEC  Documents,  and,  assuming  the  accuracy of
information  supplied by LabOne for inclusion therein,  none of the Holdings SEC
Documents  contained any untrue statement of a material fact or omitted to state
a  material  fact  required  to be  stated  therein  or  necessary  to make  the
statements  therein,  in light of the circumstances  under which they were made,
not misleading. As of their respective filing dates (or if amended or superseded
by a filing  prior to the date  hereof,  then on the date of such  filing),  the
financial statements of Holdings included in the Holdings SEC Documents complied
as to form in all material  respects with the published rules and regulations of
the SEC with respect thereto, were prepared in accordance with GAAP applied on a
consistent basis during the periods involved (except


                                       31

<PAGE>
(i) as may be indicated in the notes thereto,  (ii) in the case of the unaudited
statements,  such  differences in presentation or omissions as permitted by Rule
10-01 of Regulation S-X of the SEC and (iii) the unaudited financial  statements
do not contain all notes  required by GAAP) and fairly  presented in  accordance
with  applicable  requirements  of GAAP  (subject,  in the case of the unaudited
statements,  to normal  year-end  adjustments  on a basis  comparable  with past
periods) the  consolidated  financial  position of Holdings and its consolidated
subsidiaries  as of their  respective  dates  and the  consolidated  results  of
operations  and the  consolidated  cash flows of Holdings  and its  consolidated
subsidiaries for the periods presented therein.

         (f) Information Supplied. Assuming the accuracy of information supplied
by LabOne for  inclusion  therein,  none of the  information  supplied  or to be
supplied by Holdings  for  inclusion  or  incorporation  by reference in the S-4
will, at the time the S-4 becomes  effective  under the Securities Act or at the
Effective Time, contain any untrue statement of a material fact or omit to state
any  material  fact  required  to be stated  therein  or  necessary  to make the
statements therein not misleading, and none of the information supplied or to be
supplied by Holdings  and  included or  incorporated  by  reference in the Proxy
Statement will, at the time of mailing thereof or at the time of the meetings of
the  stockholders of Holdings or LabOne to be held in connection with the Merger
or at the  Effective  Time,  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 are made,  not  misleading.  If at any time prior to the Effective Time any
event with respect to Holdings, or with respect to other information supplied by
Holdings  for  inclusion  in the Proxy  Statement  or S-4,  shall occur which is
required to be  described  in an  amendment  of, or a  supplement  to, the Proxy
Statement or the S-4,  such event shall be so described,  and such  amendment or
supplement  shall  be  promptly  filed  with the SEC and,  as  required  by law,
disseminated to the  stockholders of Holdings and LabOne.  The S-4 and the Proxy
Statement,  insofar as they relate to Holdings or other information  supplied by
Holdings for inclusion therein,  will comply as to form in all material respects
with  the  provisions  of  the  Exchange  Act  and  the  rules  and  regulations
thereunder.

         (g) Absence of Certain  Changes or Events.  Except as disclosed  in, or
reflected in the financial  statements included in the Holdings SEC Documents or
on Schedule  3.2(g) of the Holdings  Letter,  or except as  contemplated by this
Agreement,  since  September 30, 1998,  Holdings has, in all material  respects,
conducted its business only in the ordinary  course and there has not been:  (i)
any declaration,  setting aside or payment of any dividend or other distribution
(whether in cash,  stock or property) with respect to any of Holdings's  capital
stock,  other than  regularly  quarterly  cash  dividends  consistent  with past
practice and except that, in connection with its approval of this Agreement, the
Board of Directors of Holdings has declared a stock split  payable as a dividend
so that,  immediately  prior to the Effective  Time, each issued and outstanding
share of Holdings Common Stock shall be  automatically  converted into (assuming
the effectiveness of the Merger) 1.50 shares (the


                                       32

<PAGE>
"Stock  Split")  of  validly  issued,  fully  paid and  nonassessable  shares of
Holdings  Common Stock (with the resulting  number of shares of each  registered
holder of Holdings  Common Stock being  rounded down to the nearest whole number
and with each such  registered  holder being  entitled to receive in lieu of any
fractional  shares  prior  to such  rounding  down an  amount  in cash  (without
interest) equal to an amount  determined in a manner provided in Section 4.2(l);
(ii) any amendment of any material term of any  outstanding  equity  security of
Holdings;  (iii) any repurchase,  redemption or other acquisition by Holdings of
any outstanding  shares of capital stock or other equity securities of, or other
ownership  interests  in,  Holdings;  (iv) any material  change in any method of
accounting or accounting practice, or in any tax method, principle,  election or
practice by Holdings;  (v) if the covenants and  agreements  with respect to the
Holdings  set forth in Section 4.2 had been  applicable  to Holdings  during the
period  from  September  30,  1998 to the date of this  Agreement,  any  action,
transaction,  commitment or failure to act that would cause  Holdings to fail to
comply  with  such  covenants  and   agreements;   or  (vi)  any  other  action,
transaction,  commitment,  dispute or other  event or  condition  (financial  or
otherwise) of any character  (whether or not in the ordinary course of business)
that has had, or may reasonably be expected to have, a Holdings Material Adverse
Effect.

         (h) No Undisclosed Material  Liabilities.  Except as fully reflected or
reserved  against in the  financial  statements  included  in the  Holdings  SEC
Documents,  or disclosed in the  footnotes  thereto,  or referred to in Schedule
3.2(h) or elsewhere in the Holdings  Letter,  as of the date hereof Holdings has
no  liabilities,   absolute  or  contingent   other  than   liabilities   which,
individually or in the aggregate, are reasonably expected not to have a Holdings
Material Adverse Effect. Except as so reflected, reserved or disclosed, Holdings
has no  commitments  which,  individually  or in the  aggregate,  are reasonably
expected to have a Holdings Material Adverse Effect.

         (i) Material Contracts;  No Defaults.  All of the material contracts of
Holdings  that are required to be described in the Holdings SEC  Documents or to
be filed as exhibits thereto, or that would be required to be described or filed
if a Form 10-K with  respect to Holdings  were  required to be filed on the date
hereof,  have been  described or filed in the Holdings SEC  Documents  except as
disclosed  on  Schedule  3.2(i)  of  the  Holdings  Letter.  Holdings  is not in
violation nor in default under (and no event has occurred which,  with notice or
the lapse of time or both, would constitute a default or violation) of any term,
condition  or  provision  of (i) its  Articles  of  Incorporation  and Bylaws or
comparable organizational documents, (ii) except as disclosed in Schedule 3.2(i)
of the Holdings Letter, any note, bond, mortgage,  indenture, license, agreement
or other  instrument or obligation to which  Holdings is now a party or by which
Holdings  or any of its  properties  or assets  may be bound or (iii) any order,
writ,  injunction,  decree,  statute, rule or regulation applicable to Holdings,
except in the case of (ii) and (iii) for  defaults  or  violations  which in the
aggregate would not have a Holdings Material Adverse Effect.  Schedule 3.2(i) of
the Holdings  Letter lists each contract (a) containing  covenants  which in any
way  purport to limit the  freedom of Holdings to engage in any line of business
or


                                       33

<PAGE>
engage in business in any  geographic  area or to compete with any person or (b)
that  imposes  a  material  obligation  (contingent  or  otherwise)  that is not
reflected in  Holdings's  audited GAAP  financial  statements  and notes thereto
included  in its most  recently  filed  Annual  Report on Form  10-K.  Except as
disclosed  on  Schedule  3.2(i) of the  Holdings  Letter,  to the  knowledge  of
Holdings,  none of the other  parties to material  contracts  of Holdings are in
violation of or in default under (nor does there exist any condition  which upon
the passage of time or the giving of notice  would cause such a violation  of or
default under) any contract, other than such violations or defaults as would not
have a Holdings Material Adverse Effect.

         (j)  Compliance  with  Applicable  Laws.  Holdings  holds all  permits,
licenses,  variances,  exemptions,  orders,  franchises  and  approvals  of  all
Governmental  Entities  necessary  for the lawful  conduct of its business  (the
"Holdings  Permits"),  except  where  the  failure  so to hold  would not have a
Holdings  Material  Adverse Effect.  Holdings is in compliance with the terms of
the  Holdings  Permits,  except  where the failure so to comply would not have a
Holdings  Material  Adverse  Effect.  Except  as  disclosed  or as set  forth on
Schedule 3.2(j), 3.2(k), 3.2(l), 3.2(m), 3.2(n) or 3.2(p) of the Holdings Letter
the  business  of  Holdings  is not being  conducted  in  violation  of any law,
ordinance, regulation, judgment or decree of any Governmental Entity, except for
possible  violations  which would not have a Holdings  Material  Adverse Effect.
Except as set forth on Schedule 3.2(j) of the Holdings Letter, as of the date of
this  Agreement,  no  investigation  or review by any  Governmental  Entity with
respect  to  Holdings  is,  to  the  best  knowledge  of  Holdings,  pending  or
threatened,  other  than those the  outcome  of which  would not have a Holdings
Material Adverse Effect.

         (k) Litigation.  Schedule  3.2(k) of the Holdings Letter  discloses all
suits,  actions or proceedings  pending, or, to, the best knowledge of Holdings,
threatened  against  Holdings  ("Holdings  Litigation")  on  the  date  of  this
Agreement  and all  judgments,  decrees,  injunctions,  rules or  orders  of any
Governmental  Entity  or  arbitrator  outstanding  against  Holdings  ("Holdings
Order") on the date of this Agreement,  in each case in which the amount claimed
or that could be  involved  is in excess of  $100,000.  Except as  disclosed  on
Schedule 3.2(k) of the Holdings  Letter,  there is no Holdings  Litigation that,
individually  or in  the  aggregate  with  all  other  Holdings  Litigation,  is
reasonably likely to have a Holdings  Material Adverse Effect,  nor is there any
Holdings  Order that,  individually  or in the aggregate with all other Holdings
Litigation, is reasonably likely to have a Holdings Material Adverse Effect or a
material  adverse  effect on  Holdings's  ability  to  perform  its  obligations
hereunder or to consummate the transactions contemplated by this Agreement.

         (l) Taxes. With respect to any period and with respect to any action as
to which the applicable  statute of  limitations  has not expired as of the date
hereof,  and except as set forth on Schedule  3.2(1) of the Holdings  Letter and
except for exceptions


                                       34

<PAGE>
to the  following  that  would not,  individually  or in the  aggregate,  have a
Holdings Material Adverse Effect:

                  (i) Holdings has (A) duly and timely  (taking into account any
         extensions) filed all federal,  state, local, foreign and other Returns
         required to be filed or sent by or with respect to it in respect of any
         Taxes,  including  the  consolidated  and  combined  Returns that it is
         required to file pursuant to the Tax Sharing  Agreement,  (B) duly paid
         or deposited on a timely basis all Taxes  (including  estimated  Taxes)
         that are due and payable (except for audit  adjustments not material in
         the aggregate or to the extent that liability  therefor is reserved for
         in  Holdings's  most recent  audited  financial  statements)  for which
         Holdings may be liable,  (C) established  reserves that are required by
         GAAP for the payment of all Taxes not yet due and payable  with respect
         to the results of operations of Holdings  through the date hereof,  and
         (D) complied in all material  respects with all applicable  laws, rules
         and  regulations  relating to the  withholding  of Taxes and has in all
         material  respects timely withheld from employee wages and paid over to
         the proper  governmental  authorities  all  amounts  required  to be so
         withheld and paid over;  provided,  all of the representations  made in
         this  paragraph  are  conditioned,  to the extent based on  information
         provided  by  LabOne or any of its  Subsidiaries  to  Holdings,  on the
         assumption that all such information is true,  accurate and complete in
         all material respects.

                  (ii)  Except  as  listed in  Schedule  3.2(l) of the  Holdings
         Letter, (A) there is no audit or examination being conducted by any tax
         authority  with  respect to any Return of Holdings and (B) no extension
         or waiver of a statute of limitation  regarding  liability for Taxes or
         the filing of any Return has been given or agreed to by  Holdings  that
         has the effect of keeping  open a  statutory  limitations  period  that
         would otherwise now be closed.  Except to the extent being contested in
         good  faith  and  as  disclosed  in  Schedule   3.2(l),   all  material
         deficiencies  for Taxes asserted as a result of an audit or examination
         conducted  by any  taxing  authority  with  respect  to any  Return  of
         Holdings have been paid or provided  for, in  accordance  with GAAP, in
         Holdings's  most recent audited  financial  statements  included in the
         Holdings SEC  Documents.  Except as provided  for, in  accordance  with
         GAAP, in Holdings's most recent audited financial  statements  included
         in the Holdings SEC Documents and as disclosed in Schedule  3.2(l),  no
         material deficiency for any such Taxes has been proposed,  asserted, or
         assessed  against  Holdings by any federal,  state,  local,  foreign or
         other taxing  authority  with respect to any period.  Holdings is not a
         party to an agreement  that provides for the payment of any amount that
         would  constitute an "excess  parachute  payment" within the meaning of
         Section 280G of the Code.


                                       35

<PAGE>
                  (iii)  Holdings  is not a  party  to,  bound  by or in any way
         obligated  under any tax  sharing or  allocation  agreement  or similar
         agreement or arrangement,  except for the Tax Sharing Agreement and the
         tax  sharing  agreement  dated  as  of  February  28,  1997,  with  SLH
         Corporation (now named  "Syntroleum  Corporation," the "SLH Tax Sharing
         Agreement").  All payments that are required to have been made prior to
         the date hereof by Holdings  pursuant to the Tax Sharing  Agreement and
         the SLH Tax Sharing Agreement have been made, and any payments that are
         required to be made with  respect to periods  prior to the date hereof,
         but not due until a date  subsequent to the date hereof,  are disclosed
         on Schedule 3.2(l), Holdings has complied in all material respects with
         all  provisions  of the Tax Sharing  Agreement  and the SLH Tax Sharing
         Agreement that are applicable to it.

         (m)      Pension and Benefit Plans; ERISA.

                  (i) Holdings has made available to LabOne true,  correct,  and
         complete copies of each of the following which is sponsored, maintained
         or  contributed  to by  Holdings  for the benefit of the  employees  of
         Holdings:

                           (1) each  "employee  benefit  plan,"  as such term is
                  defined in Section 3(3) of ERISA,  including,  but not limited
                  to, employee benefit plans,  such as foreign plans,  which are
                  not subject to the provisions of ERISA ("Holdings Plans"); and

                           (2)  each  personnel   policy,   stock  option  plan,
                  collective  bargaining  agreement,  bonus plan or arrangement,
                  incentive   award  plan  or  arrangement,   vacation   policy,
                  severance pay plan, policy or agreement, deferred compensation
                  agreement   or   arrangement,    executive   compensation   or
                  supplemental   income   arrangement,   consulting   agreement,
                  employment  agreement  and each other  employee  benefit plan,
                  agreement,  arrangement,  program,  practice or  understanding
                  which is not  described  in  Section  3.2(m)(i)(l)  ("Holdings
                  Benefit Programs").

                  (ii)  Except  as  disclosed  in  Schedule  3.2(m)(ii)  of  the
Holdings Letter:

                           (1)  Holdings  does  not  contribute  to or  have  an
                  obligation to  contribute  to, and have not at any time within
                  six years prior to the Effective Time contributed to or had an
                  obligation to contribute  to, a multi employer plan within the
                  meaning of Section 3(37) of ERISA;

                           (2) Holdings has substantially performed all material
                  obligations,  whether  arising  by  operation  of  law  or  by
                  contract, required to be


                                       36

<PAGE>
                  performed by it in connection  with the Holdings Plans and the
                  Holdings  Benefit  Programs,  and to the knowledge of Holdings
                  there have been no defaults or  violations  by any other party
                  to the Holdings Plans or Holdings  Benefit Programs that would
                  have a Holdings Material Adverse Effect;

                           (3)  All  reports  and  disclosures  relating  to the
                  Holdings  Plans  required  to be filed  with or  furnished  to
                  governmental   agencies,   Holdings   Plan   participants   or
                  beneficiaries  have been filed or furnished  substantially  in
                  accordance  with  applicable  law in a timely  manner,  except
                  where the failure to do so would not have a Holdings  Material
                  Adverse Effect;

                           (4) Each Holdings Plan intended to be qualified under
                  Section 401 of the Code  satisfies  the  requirements  of such
                  Section and has received a favorable determination letter from
                  the Internal  Revenue Service  regarding such qualified status
                  and has  not,  since  receipt  of the  most  recent  favorable
                  determination  letter,  been  amended or, to the  knowledge of
                  Holdings, operated in a way which would reasonably be expected
                  to materially  adversely affect such qualified  status.  As to
                  any Holdings Plan  intended to be qualified  under Section 401
                  of  the  Code,  there  has  been  no  termination  or  partial
                  termination of the Holdings Plan within the meaning of Section
                  411(d)(3) of the Code;

                           (5) There  are no  actions,  suits or claims  pending
                  (other than routine  claims for benefits) or, to the knowledge
                  of Holdings,  threatened  against,  or with respect to, any of
                  the  Holdings  Plans or  Holdings  Benefit  Programs  or their
                  assets  that would  reasonably  be expected to have a Holdings
                  Material Adverse Effect.  To the knowledge of Holdings,  there
                  is  no  matter  pending  (other  than  routine   qualification
                  determination  filings)  with  respect to any of the  Holdings
                  Plans before the IRS, the United States Department of Labor or
                  the PBGC;

                           (6)      There are no Holdings Plans subject to Title
                                    IV of ERISA;

                           (7) No act,  omission  or  transaction  has  occurred
                  which would result in  imposition on Holdings of (A) liability
                  for a breach of fiduciary duty under Section 409 of ERISA, (B)
                  a civil penalty  assessed  pursuant to subsections (c), (i) or
                  (1) of Section 502 of ERISA or (C) a tax  imposed  pursuant to
                  Chapter 43 of  Subtitle D of the Code that,  in any such case,
                  could  reasonably  be  expected  to have a  Holdings  Material
                  Adverse Effect;

                           (8) With respect to any employee benefit plan, within
                  the meaning of Section 3(3) of ERISA,  which is not a Holdings
                  Plan but which is sponsored,  maintained or contributed to, or
                  has been sponsored,


                                       37

<PAGE>
                  maintained  or  contributed  to within six years  prior to the
                  Effective Time, by any corporation,  trade, business or entity
                  under  common  control  with  Holdings,  within the meaning of
                  Section  414(b),  (c) or (m) of the  Code or  Section  4001 of
                  ERISA  ("Holdings   Commonly  Controlled   Entity"),   (A)  no
                  withdrawal  liability,  within the meaning of Section  4201 of
                  ERISA, has been incurred,  which withdrawal  liability has not
                  been satisfied, (B) no liability to the PBGC has been incurred
                  by any Holdings Commonly  Controlled  Entity,  which liability
                  has not been satisfied, (C) no accumulated funding deficiency,
                  whether or not  waived,  within the  meaning of Section 302 of
                  ERISA or Section  412 of the Code has been  incurred,  and (D)
                  all  contributions   (including  installments)  to  such  plan
                  required  by Section  302 of ERISA and Section 412 of the Code
                  have been timely made; and

                           (9) After taking into  account all consents  obtained
                  from  participants  in  Holdings  Plans and  Holdings  Benefit
                  Programs, the execution and delivery of this Agreement and the
                  consummation of the transactions  contemplated hereby will not
                  (A) require Holdings to make a larger  contribution to, or pay
                  greater  benefits under, any Holdings Plan or Holdings Benefit
                  Program than it otherwise would (B) create or give rise to any
                  additional or  accelerated  vested  rights or service  credits
                  under any Holdings Plan or Holdings  Benefit  Program,  or (C)
                  accelerate  the  vesting,  accrual  or  exercisability  of any
                  benefits or rights under any Holdings Plan or Holdings Benefit
                  Program,  including,  without limitation,  acceleration of the
                  date on which any  stock  option(s)  may  first be  exercised,
                  other than the options referred to in Schedule 3.2(m)(ii).

                  (iii)  Except as  disclosed  on  Schedule  3.2(m)(iii)  of the
         Holdings  Letter,  there  are no  severance  agreements  or  employment
         agreements  between  Holdings and any  employee of  Holdings.  True and
         correct  copies of all such severance and  employment  agreements  have
         been provided to LabOne. Except as disclosed on Schedule 3.2(m)(iii) of
         the  Holdings  Letter,  (A)  Holdings  has no  consulting  agreement or
         arrangement with any person involving annual  compensation in excess of
         $100,000,  except as are  terminable  without  penalty upon one month's
         notice or less, and (B) no stock or other  security  issued by Holdings
         forms a material  part of the assets of any  Holdings  Plan or Holdings
         Benefit Program.

         (n)      Labor Matters.

                  (i) Except as set forth in Schedule  3.2(n)(i) of the Holdings
         Letter, as of the date of this Agreement,  (1) no employees of Holdings
         are represented by any labor organization; (2) no labor organization or
         group of employees of Holdings  has made a written,  or, to  Holdings's
         knowledge,  other  form of demand  pending  demand for  recognition  or
         certification, and there are no representation or


                                       38

<PAGE>
         certification   proceedings  or  petitions   seeking  a  representation
         proceeding  presently pending or threatened in writing to be brought or
         filed  with the  National  Labor  Relations  Board or any  other  labor
         relations tribunal or authority;  and (3) to the knowledge of Holdings,
         there are no organizing  activities involving Holdings pending with any
         labor organization or group of employees of Holdings; or

                  (ii)  Except  as  set  forth  on  Schedule  3.2(n)(ii)  of the
         Holdings  Letter,   Holdings  is  in  compliance  with  all  applicable
         employment and labor laws and regulations relating to the employment of
         labor,  including  all such laws and orders  relating to wages,  hours,
         collective bargaining,  discrimination, civil rights, safety and health
         workers'  compensation  and the  collection  and payment of withholding
         and/or  Social  Security  Taxes and  similar  Taxes,  except  where the
         failure to comply would not have a Holdings Material Adverse Effect.

         (o) Intangible Property. To Holdings's knowledge, Holdings possesses or
has  adequate  rights to use all  material  trademarks,  trade  names,  patents,
service marks, brand marks, brand names, computer programs, database, industrial
designs, trade secrets, technology and copyrights necessary for the operation of
its business  (collectively,  the "Holdings Intangible Property"),  except where
the failure to possess or have adequate rights to use such properties  would not
reasonably  be expected to have a Holdings  Material  Adverse  Effect.  Schedule
3.2(o) lists all material patents and trademark  registrations (and applications
for  patents  and  trademark  applications)  or  licensing  agreements  that are
applicable to a material  portion of the business of Holdings and the failure to
possess  would not  reasonably be expected to have a Holdings  Material  Adverse
Effect. To the knowledge of Holdings,  except as set forth on Schedule 3.2(o) of
the Holdings Letter, all of the Holdings Intangible Property is owned or used by
Holdings  free and clear of any and all liens,  claims or  encumbrances,  except
those that are not reasonably likely to have a Holdings Material Adverse Effect,
and Holdings has not forfeited or otherwise relinquished any Holdings Intangible
Property which forfeiture would result in a Holdings Material Adverse Effect. To
the knowledge of Holdings,  the use of Holdings  Intangible Property by Holdings
does not, in any material  respect,  conflict with,  infringe  upon,  violate or
interfere  with or  constitute  an  appropriation  of any  valid  right,  title,
interest or goodwill,  including,  without limitation, any intellectual property
right,  trademark,  trade name,  patent,  service mark,  brand mark, brand name,
computer  program,  database,   industrial  design,  copyright  or  any  pending
application  therefor of any other person and there have been no claims made and
Holdings has not received any notice of any claim or otherwise knows that any of
Holdings Intangible Property is invalid or conflicts with the asserted rights of
any other  person or has not been used or enforced or has been failed to be used
or enforced in a manner that would result in the  abandonment,  cancellation  or
unenforceability  of any of Holdings  Intangible  Property,  except for any such
conflict, infringement, violation, interference, claim, invalidity, abandonment,
cancellation or unenforceability that would not reasonably be expected to have a
Holdings Material Adverse Effect.


                                       39
<PAGE>
         (p)      Environmental Matters.

                  (i) Except as  disclosed  on Schedule  3.2(p) of the  Holdings
         Letter,  the  operations  of Holdings  have been and are  currently  in
         compliance with all Environmental  Laws, except where the failure to so
         comply  would not  reasonably  be expected to have a Holdings  Material
         Adverse Effect.

                  (ii) Except as  disclosed  on Schedule  3.2(p) of the Holdings
         Letter, Holdings has obtained and maintained all permits required under
         applicable  Environmental  Laws for the  continued  operations of their
         respective businesses,  except such permits the lack of which would not
         reasonably be expected to have a Holdings Material Adverse Effect.

                  (iii) Except as  disclosed on Schedule  3.2(p) of the Holdings
         Letter,  as of the date hereof  Holdings is not subject to any material
         (individually  or in  the  aggregate)  outstanding  written  orders  or
         material  contracts  with  any  Governmental  Entity  or  other  person
         respecting  (A)  Environmental  Laws,  (B)  Remedial  Action or (C) any
         Release or threatened Release of a Hazardous Material.

                  (iv) Except as  disclosed  on Schedule  3.2(p) of the Holdings
         Letter,  Holdings has not received any written communication  alleging,
         with respect to any such party,  and has no knowledge of, the violation
         of or  liability  under  any  Environmental  Law,  which  violation  or
         liability  would  reasonably  be expected  to have a Holdings  Material
         Adverse Effect.

                  (v) Except as  disclosed  on Schedule  3.2(p) of the  Holdings
         Letter,  Holdings has no contingent  liability in  connection  with any
         Release of any Hazardous Material  including,  without  limitation,  in
         connection  with the  exposure of any person or  property to  Hazardous
         Material that would reasonably be expected to have a Holdings  Material
         Adverse Effect.

                  (vi) Except as  disclosed  on Schedule  3.2(p) of the Holdings
         Letter,   the   operations  of  Holdings   involving  the   generation,
         transportation,  treatment,  storage or disposal of hazardous waste, as
         defined and  regulated  under 40 C.F.R.  Parts 260-270 (in effect as of
         the date of this  Agreement)  or any  state  equivalent,  or any  other
         Hazardous  Material are in  compliance  with  applicable  Environmental
         Laws,  except  where the failure to so comply would not  reasonably  be
         expected to have a Holdings Material Adverse Effect.

                  (vii) Except as  disclosed on Schedule  3.2(p) of the Holdings
         Letter,  to the  knowledge of Holdings as of the date hereof,  there is
         not now on or in any property of Holdings any of the following: (A) any
         underground   storage   tanks   or   surface   impoundments,   (B)  any
         asbestos-containing materials, or (C) any polychlorinated


                                       40

<PAGE>
         biphenyls, any of which ((A), (B) or (C) preceding) could reasonably be
         expected to have a Holdings  Material Adverse Effect.  To the knowledge
         of  Holdings as of the date  hereof,  none of the  properties  owned or
         operated  by  Holdings  are  restricted  as to use or as to transfer of
         title,  or the  subject  of any  special  recorded  notice,  under  any
         Environmental Law.

                  (viii)  Holdings  has made  available to LabOne for review all
         written reports of  environmental  audits and assessments  prepared for
         Holdings  within the last three  years by third  party  consultants  or
         internal  environmental,  safety or health  personnel  which are in the
         possession  or control of  Holdings  and which  relate to the assets or
         operations of Holdings.

         (q) Opinion of  Financial  Advisor.  The Board of Directors of Holdings
has received  the opinion of Salomon  Smith Barney Inc. (a copy of which will be
delivered to LabOne),  dated the date of this Agreement,  to the effect that, as
of  such  date,   after  taking  into  account  the  Stock  Split,   the  Merger
Consideration is fair to Holdings from a financial point of view.

         (r) Vote  Required.  Assuming that the Articles  Amendment is approved,
the affirmative  vote of the holders of two-thirds of the outstanding  shares of
Holdings  Common Stock is the only vote of the holders of any class or series of
Holdings  capital stock  necessary to approve this  Agreement and the Merger and
the transactions contemplated hereby.

         (s) Insurance.  Holdings has delivered to LabOne an insurance  schedule
of Holdings's (i) directors' and officers' liability insurance, and (ii) primary
and excess casualty insurance policies, providing coverage for bodily injury and
property  damage to third parties,  including  products  liability and completed
operations coverage, and worker's compensation, in each case in effect as of the
date hereof.  Holdings maintains  insurance coverage reasonably adequate for the
operation  of the  business  of  Holdings  (taking  into  account  the  cost and
availability of such insurance),  and the transactions  contemplated hereby will
not materially adversely affect such coverage.

         (t) Brokers.  Except as  disclosed  on Schedule  3.2(t) of the Holdings
Letter,  no  broker,  investment  banker,  or other  person is  entitled  to any
broker's,  finder's or other similar fee or  commission  in connection  with the
transactions  contemplated by this Agreement based upon  arrangements made by or
on behalf of Holdings.

         (u) Title. Except as disclosed in the Holdings Financial  Statements or
on Schedule  3.2(u) of the Holdings  Letter,  Holdings  has good and  marketable
title to all real property and good title to all personal  property owned by it,
in each case free and clear of all liens, pledges or encumbrances securing money
borrowed,  the  deferred  purchase  price of  property  in excess of $300,000 or
capital leases and free and clear of all other liens,


                                       41

<PAGE>
pledges,  encumbrances  or defects  that could  affect the value or use  thereof
except for any such other liens, pledges, encumbrances or defects that would not
have a Holdings Material Adverse Effect.

         (v) Books and Records.  Holdings (i) makes and keeps accurate books and
records and (ii) maintains internal accounting controls which provide reasonable
assurance that (A)  transactions  are executed in accordance  with  management's
authorization,  (B) transactions are recorded as necessary to permit preparation
of their financial  statements and to maintain  accountability for their assets,
(C) access to its  assets is  permitted  only in  accordance  with  management's
authorization  and (D) the  reported  accountability  for its assets is compared
with  existing  assets at  reasonable  intervals,  except for any  inaccuracy or
inadequacy of controls that would not  reasonably be expected to have a Holdings
Material Adverse Effect.

         (w) Certain  Payments.  Neither  Holdings,  nor any director,  officer,
agent,  employee  or other  person  associated  with or  acting on behalf of the
Holdings,  has used any  corporate  funds for any unlawful  contribution,  gift,
entertainment or other unlawful expense relating to political activity; made any
direct or indirect  unlawful  payment to any  foreign or  domestic  governmental
official or employee from  corporate  funds;  violated or is in violation of any
provision of the Foreign  Corrupt  Practices  Act of 1977;  nor made any illegal
bribe, rebate,  payoff,  influence payment,  kickback or other unlawful payment,
except for any such expenses,  payments or violations  that would not reasonably
be expected to have a Holdings Material Adverse Effect.

         (x) Transactions with Related Parties.  Except as set forth in Schedule
3.2(x) of the Holdings  Letter or in the Holdings  SEC  Documents,  there are no
agreements,  contracts or other  arrangements  between (i) Holdings,  on the one
hand, and (ii) any Related Person of Holdings,  on the other hand. Except as set
forth in Schedule  3.2(x) of the  Holdings  Letter,  as of the  Closing  Date no
Related  Person of  Holdings  and no present  officer or director of any Related
Person of Holdings  shall have any interest in any  property  (real or personal,
tangible or  intangible)  or contract  used in or  pertaining to the business of
Holdings  and no Related  Person of  Holdings  shall have any direct or indirect
ownership  interest  (excluding  immaterial  passive  investments) in any person
(other than  through  Holdings)  with which  Holdings  competes in any  material
respect  or has a material  business  relationship.  Other  than those  services
described in the Holdings SEC Documents,  Schedule 3.2(x) of the Holdings Letter
sets  forth as of the  date of this  Agreement  a  description  of all  services
provided by any Related Person of Holdings to Holdings.

         (y)  State  Takeover  Laws.  The  transactions   contemplated  by  this
Agreement are exempt from the provisions of Sections  351.407 and 351.459 of the
Missouri Law.


                                       42

<PAGE>
         (z) Nature of Election by Certain Affiliates. Each of the Directors and
executive  officers of Holdings  has  represented  to Holdings  that such person
intends to make a Stock  Election  with  respect to any shares of LabOne  Common
Stock that such person owns at the Effective Time.





                                   ARTICLE IV

                    COVENANTS RELATING TO CONDUCT OF BUSINESS

         4.1 Conduct of Business by LabOne Pending the Merger. During the period
from the date of this Agreement and continuing until the Effective Time,  LabOne
agrees as to itself and its Subsidiaries that (except as expressly  contemplated
or permitted by this  Agreement,  or to the extent that Holdings shall otherwise
consent in writing):

         (a) Ordinary  Course.  Except as provided on Schedule  4.1(a) of LabOne
Letter  and  except as  contemplated  by  Section  5.16,  each of LabOne and its
Subsidiaries  shall  carry on its  businesses  only in the  usual,  regular  and
ordinary  course in  substantially  the same manner as heretofore  conducted and
shall use all  commercially  reasonable  efforts to preserve  intact its present
business organizations,  keep available the services of its current officers and
employees, and endeavor to preserve its relationships with customers,  suppliers
and others  having  business  dealings  with it to the end that its goodwill and
ongoing  business shall not result in any LabOne  Material  Adverse Effect as of
the Effective Time.

         (b) Dividends;  Changes in Stock. Except as provided on Schedule 4.1(b)
of LabOne Letter and except for quarterly  cash  dividends  consistent  with the
current  practice of the LabOne Board,  LabOne shall not and it shall not permit
any of its  Subsidiaries  to: (i) declare or pay any  dividends on or make other
distributions in respect of any of its capital stock, except for the declaration
and  payment  of  dividends  from a  Subsidiary  of LabOne to LabOne or  another
Subsidiary of LabOne and except for cash dividends or  distributions  paid on or
with respect to the capital stock of a Subsidiary of LabOne; (ii) split, combine
or  reclassify  any of its capital  stock or issue or  authorize  or propose the
issuance of any other  securities  in respect of, in lieu of or in  substitution
for  shares of its  capital  stock;  or (iii)  repurchase,  redeem or  otherwise
acquire,  or permit any of its  Subsidiaries  to  purchase,  redeem or otherwise
acquire, any shares of its capital stock, except as required by the terms of its
securities outstanding on the date hereof, as contemplated by any LabOne Plan or
LabOne Benefit Program or pursuant to the terms of any existing  agreements with
employees of LabOne and its  Subsidiaries  upon the termination of employment of
any such employee.


                                       43

<PAGE>
         (c)  Issuance of  Securities.  LabOne shall not and it shall not permit
any of its Subsidiaries  to, issue,  deliver or sell, or authorize or propose to
issue, deliver or sell, any shares of its capital stock of any class, any Voting
Debt or any securities  convertible into, or any rights,  warrants or options to
acquire, any such shares, Voting Debt or convertible securities, other than: (i)
the issuance of LabOne  Common Stock upon the exercise of stock options or other
rights granted under LabOne Stock Option Plans that are  outstanding on the date
hereof,  or in  satisfaction of stock grants or stock based awards made prior to
the date hereof  pursuant to LabOne  Stock  Option  Plans or the exercise of any
other rights by  participants  under any LabOne Plan or LabOne Benefit  Program;
and (ii)  issuances by a wholly  owned  Subsidiary  of its capital  stock to its
parent.

         (d) Governing  Documents.  Except   as   contemplated  hereby  or   in 
connection   herewith,  LabOne  shall   not  amend or  propose   to  amend  its
Certificate  of Incorporation or Bylaws.

         (e) No Acquisitions.  Other than acquisitions listed on Schedule 4.1(e)
of  LabOne  Letter,  LabOne  shall  not  and  it  shall  not  permit  any of its
Subsidiaries to, acquire or agree to acquire by merging or,  consolidating with,
or by purchasing a substantial  equity  interest in or a substantial  portion of
the  assets  of,  or by any  other  manner,  any  business  or any  corporation,
partnership, association or other business organization or division thereof.

         (f)  No   Dispositions.   Other  than:  (i)  dispositions  or  proposed
dispositions  listed on Schedule 4.1(f) of LabOne Letter;  (ii)  dispositions as
may be necessary or required by law to consummate the transactions  contemplated
hereby;   or  (iii)   dispositions  of  other  assets  that  are  not  material,
individually  or in the  aggregate,  to LabOne and its  Subsidiaries  taken as a
whole, LabOne shall not and it shall not permit any of its Subsidiaries to sell,
lease,  encumber or otherwise  dispose of, or agree to sell, lease (whether such
lease is an operating or capital lease),  encumber or otherwise  dispose of, any
of  its  assets.   Notwithstanding  the  foregoing,   none  of  LabOne  nor  its
Subsidiaries  shall sell,  lease,  encumber or otherwise dispose of, or agree to
dispose of, any of its assets to any Related  Person  other than in the ordinary
course of business on an arms length basis.

         (g) No Dissolution,  Etc. Except as otherwise permitted or contemplated
by this Agreement, LabOne shall not authorize, recommend, propose or announce an
intention to adopt a plan of complete or partial  liquidation  or dissolution of
LabOne or any of its Subsidiaries.

         (h) Certain Employee Matters. Except as set forth on Schedule 4.1(h) of
LabOne Letter,  LabOne shall not and it shall not permit any of its Subsidiaries
to:  (i)  grant  any  increases  in the  compensation  of any of its  directors,
officers or employees,  except  increases in the ordinary course of business and
in accordance with past practice; (ii) pay


                                       44

<PAGE>
or agree to pay any pension,  retirement allowance or other employee benefit not
required or  contemplated  by any of the  existing  LabOne  Benefit  Programs or
LabOne  Plans as in effect on the date hereof to any such  director,  officer or
employee,  whether  past or  present;  (iii)  enter  into any new,  or amend any
existing,  employment  or  severance  or  termination  agreement  with  any such
director, officer or key employee; or (iv) become obligated under any new LabOne
Benefit  Program or LabOne  Plan,  which was not in existence or approved by the
Board of Directors  of LabOne prior to or on the date hereof,  or amend any such
plan or arrangement in existence on the date hereof if such amendment would have
the effect of materially enhancing or accelerating any benefits thereunder.

         (i) Indebtedness;  Leases; Capital Expenditures. Except as set forth on
Schedule 4.1(i) of LabOne Letter,  LabOne shall not, nor shall LabOne permit any
of its Subsidiaries to, (i) except in the ordinary course of business, incur any
indebtedness  for borrowed money or guarantee any such  indebtedness or issue or
sell any debt securities or warrants or rights to acquire any debt securities of
such  party or any of its  Subsidiaries  or  guarantee  any debt  securities  of
others,  (ii) except in the ordinary  course of  business,  enter into any lease
(whether such lease is an operating or capital  lease) or create any  mortgages,
liens, security interests or other encumbrances on the property of LabOne or any
of its  Subsidiaries in connection  with any  indebtedness  thereof,  except for
those securing purchase money  indebtedness or (iii) commit to aggregate capital
expenditures in excess of $100,000  outside the capital  budget,  as approved by
LabOne prior to the date hereof.

         (j)  No   Solicitation.   Until  the  Effective  Time  or  the  earlier
termination of this Agreement, LabOne will not, and will not authorize or permit
any of its officers,  directors,  employees, agents and other representatives or
those of any of its Subsidiaries  (collectively,  "LabOne  Representatives") to,
directly or indirectly,  solicit or initiate any prospective buyer or the making
of any proposal that  constitutes,  or may  reasonably be expected to lead to, a
LabOne  Acquisition  Proposal  (as defined  herein)  from any person;  provided,
however, that, notwithstanding any other provision of this Agreement, (i) LabOne
may engage in  discussions or  negotiations  with a third party who (without any
solicitation  or initiation,  directly or  indirectly,  by or with LabOne or any
LabOne  Representatives after the date of this Agreement) seeks to initiate such
discussions  or  negotiations  and may  furnish  such  third  party  information
concerning LabOne and its business,  properties and assets,  (ii) LabOne's Board
of  Directors  may  take  and  disclose  to  LabOne's  stockholders  a  position
contemplated  by Rule  14e-2(a)  promulgated  under the  Exchange  Act and (iii)
following receipt of a LabOne Acquisition  Proposal that is financially superior
to the Merger and  reasonably  capable of being  financed (as determined in each
case  in good  faith  by the  Special  Committee  after  consultation  with  the
financial advisors to the Special  Committee),  the Board of Directors of LabOne
may withdraw,  modify or change its  recommendation  referred to in Section 5.5,
based  on the  recommendation  by  the  Special  Committee,  or  terminate  this
Agreement in accordance with Section 7.1(b),  based on the recommendation by the
Special  Committee,  but in each case referred to in the  foregoing  clauses (i)
through (iii) only to the extent that (A) the


                                       45

<PAGE>
Board of Directors  of LabOne in the  exercise of its good faith  judgment as to
its fiduciary duties to all LabOne Stockholders,  as advised by outside counsel,
or (B) the Special  Committee in the  exercise of its good faith  judgment as to
its fiduciary  duties to the  unaffiliated  LabOne  Stockholders,  as advised by
outside  counsel to the Special  Committee,  shall  conclude that such action is
necessary.  LabOne  shall  immediately  cease  and  cause to be  terminated  any
existing  solicitation,   initiation,  encouragement,  activity,  discussion  or
negotiation  with any  parties  conducted  heretofore  by LabOne  or any  LabOne
Representatives  with respect to any LabOne Acquisition Proposal existing on the
date hereof.  LabOne will promptly notify Holdings of any such requests for such
information  or the receipt of any LabOne  Acquisition  Proposal,  including the
identity of the person or group engaging in such  discussions  or  negotiations,
requesting  such  information or making such LabOne  Acquisition  Proposal,  and
(unless  (i) the Board of  Directors  of LabOne  concludes  such  disclosure  is
inconsistent  with its  fiduciary  obligations  to all LabOne  Stockholders,  as
advised by outside counsel,  or (ii) the Special  Committee  concludes that such
disclosure is inconsistent with its fiduciary obligations to Unaffiliated LabOne
Stockholders,  as advised  by outside  counsel  to the  Special  Committee)  the
material terms and  conditions of any LabOne  Acquisition  Proposal.  As used in
this Agreement,  "LabOne Acquisition Proposal" shall mean any proposal or offer,
other than a  proposal  or offer by  Holdings  or any of its  affiliates,  for a
tender or exchange offer, a merger,  consolidation or other business combination
involving  LabOne or any  Subsidiary of LabOne or any proposal to acquire in any
manner a substantial  equity interest in, or substantially all of the assets of,
LabOne or any of its Subsidiaries.

         (k)  Pooling.  LabOne  shall not,  nor shall  LabOne  permit any of its
Subsidiaries  to, enter into any agreement,  effect any  transaction,  incur any
obligation  or  commitment  or take any other  action that could  reasonably  be
expected to prevent any merger,  consolidation or acquisition of stock or assets
of any entity by the Surviving  Corporation  to be accounted for as a pooling of
interests under  applicable SEC  requirements  and GAAP,  assuming that the sole
consideration from the Surviving  Corporation therefor is Surviving  Corporation
Common Stock.

         4.2  Conduct of Business  by  Holdings  Pending the Merger.  During the
period from the date of this Agreement and continuing  until the Effective Time,
Holdings  agrees that  (except as  expressly  contemplated  or permitted by this
Agreement, or to the extent that LabOne shall otherwise consent in writing):

         (a)  Ordinary  Course.  Except as provided  on  Schedule  4.2(a) of the
Holdings  Letter,  Holdings  shall  carry on its  businesses  only in the usual,
regular and  ordinary  course in  substantially  the same  manner as  heretofore
conducted and shall use all commercially  reasonable  efforts to preserve intact
its present business  organizations,  keep available the services of its current
officers  and  employees,  and  endeavor  to  preserve  its  relationships  with
customers, suppliers and others having business dealings with it to the end that
its


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<PAGE>
goodwill and ongoing business shall not result in any Holdings  Material Adverse
Effect as of the Effective Time.

         (b) Dividends;  Changes in Stock. Except as provided on Schedule 4.2(b)
of the Holdings Letter,  Holdings shall not: (i) declare or pay any dividends on
or make other  distributions  in respect of any of its capital  stock other than
regular  quarterly cash  dividends  consistent  with past practice;  (ii) split,
combine or reclassify  any of its capital stock or issue or authorize or propose
the  issuance  of  any  other  securities  in  respect  of,  in  lieu  of  or in
substitution  for shares of its capital stock;  or (iii)  repurchase,  redeem or
otherwise  acquire,  or permit any of its  Subsidiaries  to purchase,  redeem or
otherwise acquire,  any shares of its capital stock,  except for the Stock Split
or as required by the terms of its securities outstanding on the date hereof, as
contemplated by any Holdings Plan or Holdings Benefit Program or pursuant to the
terms of any existing agreements with employees of Holdings upon the termination
of employment of any such employee.

         (c) Issuance of  Securities.  Except  pursuant to the Stock Split or as
provided on Schedule 4.2(c) of the Holdings  Letter,  Holdings shall not, issue,
deliver or sell, or authorize or propose to issue,  deliver or sell,  any shares
of its capital stock of any class, any Voting Debt or any securities convertible
into,  or any rights,  warrants or options to acquire,  any such shares,  Voting
Debt or convertible securities, other than the issuance of Holdings Common Stock
upon the exercise of stock options granted under Holdings Stock Option Plan that
are  outstanding  on the date  hereof  or the  exercise  of any  other  right by
participants under any Holdings Plan or Holdings Benefit Program.

        (d) Governing  Documents.    Except  as  contemplated   hereby   or   in
connection   herewith,  Holdings  shall  not  amend  or  propose  to  amend  its
Articles  of Incorporation or Bylaws.

         (e) No Acquisitions.  Other than acquisitions listed on Schedule 4.2(e)
of the Holdings  Letter,  Holdings  shall not and it shall not permit any of its
Subsidiaries to, acquire or agree to acquire by merging or  consolidating  with,
or by purchasing a substantial  equity  interest in or a substantial  portion of
the  assets  of,  or by any  other  manner,  any  business  or any  corporation,
partnership, association or other business organization or division thereof.

         (f) No Dispositions.  Other than: (i)  dispositions  listed on Schedule
4.2(f) of the Holdings Letter (ii)  dispositions as may be necessary or required
by law to consummate the transactions contemplated hereby; or (iii) dispositions
of other assets that are not  material,  individually  or in the  aggregate,  to
Holdings,  Holdings shall not sell, lease,  encumber or otherwise dispose of, or
agree to sell,  lease  (whether  such lease is an operating  or capital  lease),
encumber  or  otherwise  dispose  of,  any of its  assets.  Notwithstanding  the
foregoing,  Holdings shall not sell, lease, encumber or otherwise dispose of, or
agree to dispose of, (A) any of its assets to any Related Person other than


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<PAGE>
in the ordinary  course of business on an arms length basis or (B) any shares of
LabOne Common Stock.

         (g) No Dissolution,  Etc. Except as otherwise permitted or contemplated
by this Agreement, Holdings shall not authorize,  recommend, propose or announce
an intention to adopt a plan of complete or partial  liquidation  or dissolution
of Holdings.

         (h) Certain Employee Matters. Except as set forth on Schedule 4.2(h) of
the  Holdings  Letter,  Holdings  shall  not : (i) grant  any  increases  in the
compensation of any of its directors, officers or employees, except increases in
the ordinary course of business and in accordance  with past practice;  (ii) pay
or agree to pay any pension,  retirement allowance or other employee benefit not
required or contemplated  by any of the existing  Holdings  Benefit  Programs or
Holdings Plans as in effect on the date hereof to any such director,  officer or
employee,  whether  past or  present;  (iii)  enter  into any new,  or amend any
existing,  employment  or  severance  or  termination  agreement  with  any such
director,  officer  or key  employee;  or (iv)  become  obligated  under any new
Holdings  Benefit  Program  or  Holdings  Plan,  which was not in  existence  or
approved by the Board of Directors  of Holdings  prior to or on the date hereof,
or amend any such plan or  arrangement  in  existence on the date hereof if such
amendment  would have the effect of  materially  enhancing or  accelerating  any
benefits thereunder.

         (i) Indebtedness;  Leases; Capital Expenditures. Except as set forth on
Schedule  4.2(i) of the  Holdings  Letter or as  contemplated  by Section  5.13,
Holdings  shall not,  (i) except in the ordinary  course of business,  incur any
indebtedness  for borrowed  money (except for working  capital under  Holdings's
existing  credit  facilities,  and  refinancings  of  existing  debt that permit
prepayment of such debt without  penalty) or guarantee any such  indebtedness or
issue or sell any debt  securities  or  warrants  or rights to acquire  any debt
securities  or  guarantee  any debt  securities  of others,  (ii)  except in the
ordinary  course of  business,  enter into any lease  (whether  such lease is an
operating or capital lease) or create any mortgages,  liens,  security interests
or other  encumbrances  on the  property  of  Holdings  in  connection  with any
indebtedness  thereof,  except for those securing purchase money indebtedness or
(iii) commit to aggregate capital expenditures in excess of $100,000 outside the
capital budget, as approved by Holdings prior to the date hereof.

         (j)  No   Solicitation:   Until  the  Effective  Time  or  the  earlier
termination  of this  Agreement,  Holdings  will not, and will not  authorize or
permit   any  of  its   officers,   directors,   employees,   agents  and  other
representatives  (collectively,  "Holdings  Representatives")  to,  directly  or
indirectly,  solicit  or  initiate  any  prospective  buyer or the making of any
proposal that constitutes,  or may reasonably be expected to lead to, a Holdings
Acquisition  Proposal (as defined  herein) from any person;  provided,  however,
that,  notwithstanding  any other provision of this Agreement,  (i) Holdings may
engage in  discussions  or  negotiations  with a third  party who  (without  any
solicitation or initiation,


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<PAGE>
directly or  indirectly,  by or with  Holdings or any  Holdings  Representatives
after  the  date of this  Agreement)  seeks  to  initiate  such  discussions  or
negotiations and may furnish such third party  information  concerning  Holdings
and its business,  properties and assets, (ii) Holdings's Board of Directors may
take and disclose to Holdings's  stockholders  a position  contemplated  by Rule
14e-2(a)  promulgated  under the Exchange Act and (iii)  following  receipt of a
Holdings  Acquisition  Proposal that is  financially  superior to the Merger and
reasonably  capable of being  financed (as determined in each case in good faith
by Holdings's Board of Directors after  consultation  with Holdings's  financial
advisors), the Board of Directors of Holdings may withdraw, modify or change its
recommendation  referred  to in  Section  5.5 or  terminate  this  Agreement  in
accordance  with Section  7.1(b),  but in each case referred to in the foregoing
clauses (i)  through  (iii) only to the extent  that the Board of  Directors  of
Holdings  shall  conclude,  in the exercise of its good faith judgment as to its
fiduciary  duties to its  stockholders  imposed  by law,  as  advised by outside
counsel,  that such action is necessary.  Holdings shall  immediately  cease and
cause to be terminated  any existing  solicitation,  initiation,  encouragement,
activity,  discussion or negotiation  with any parties  conducted  heretofore by
Holdings  or  any  Holdings   representatives   with  respect  to  any  Holdings
Acquisition Proposal existing on the date hereof.  Holdings will promptly notify
LabOne of any such requests for such  information or the receipt of any Holdings
Acquisition Proposal,  including the identity of the person or group engaging in
such  discussions or  negotiations,  requesting such  information or making such
Holdings  Acquisition  Proposal,  and (unless the Board of Directors of Holdings
concludes such disclosure is inconsistent  with its fiduciary  obligations under
applicable law, as advised by outside counsel) the material terms and conditions
of any  Holdings  Acquisition  Proposal.  As used in this  Agreement,  "Holdings
Acquisition Proposal" shall mean any proposal or offer, other than a proposal or
offer by LabOne or any of its  affiliates,  for a tender or  exchange  offer,  a
merger, consolidation or other business combination involving Holdings or LabOne
or any proposal to acquire in any manner a  substantial  equity  interest in, or
substantially all of the assets of, Holdings or LabOne.

         (k)  Pooling.  Except for stock  purchases  required  to  maintain  the
ability to file  consolidated  tax reports with LabOne on a consolidated  basis,
Holdings shall not enter into any agreement,  effect any transaction,  incur any
obligation  or  commitment  or take any other  action that could  reasonably  be
expected to prevent any merger,  consolidation or acquisition of stock or assets
of any entity by the Surviving  Corporation  to be accounted for as a pooling of
interests under  applicable SEC  requirements  and GAAP,  assuming that the sole
consideration from the Surviving  Corporation therefor is Surviving  Corporation
Common Stock.

         (l)      Stock Split.

                  (i) Holdings  shall take all actions  reasonably  necessary to
cause the Stock Split (to be effected as a stock  dividend) to become  effective
immediately prior to the


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<PAGE>
Effective Time (provided that Holdings's  obligation to cause the Stock Split to
become  effective  shall be subject  to the prior  satisfaction  or  waiver,  as
applicable, of each of the conditions to the respective obligation of each party
to effect the Merger set forth in Article VI (other than Section  6.1(h))  shall
have been satisfied or waived).

                  (ii) In  connection  with  the  Stock  Split,  there  shall be
transferred on the books of Holdings from retained  earnings to the common stock
capital account of Holdings,  immediately prior to the Effective Time, an amount
equal to the  product  of $1.00  times the  number of whole  shares of  Holdings
Common Stock issuable in connection with such dividend.

                  (iii) In connection with the Stock Split, Holdings may deposit
with American Stock Transfer & Trust Company or such other institution as it may
select  (the  "Distribution  Agent") for the benefit of the holders of shares of
Holdings Common Stock, for distribution  through the Distribution Agent, cash or
shares in an amount  sufficient to satisfy the obligations of Holdings to make a
distribution  in  connection  with the  Stock  Split  and to make  payments  for
fractional  shares  (such cash or shares  being  hereinafter  referred to as the
"Distribution  Fund").  In such event, as promptly as practicable  following the
Effective  Time,  the  Distribution  Agent will  determine the excess of (A) the
number  of  whole  shares  delivered  to the  Distribution  Agent  over  (B) the
aggregate  number of whole shares payable to holders of Holdings Common Stock in
connection  with the Stock Split (such excess  being  herein  called the "Excess
Shares").  Following the Effective  Time, the  Distribution  Agent will sell the
Excess Shares at  then-prevailing  prices on the Nasdaq Stock Market, all in the
manner provided in clause (iv) below.

                  (iv) Any sale of the Excess Shares by the  Distribution  Agent
will be executed  through one or more  brokers or dealers,  as the  Distribution
Agent shall determine, in round lots to the extent practicable. The Distribution
Agent will use  reasonable  efforts to complete the sale of the Excess Shares as
promptly  following  the  Effective  Time as, in the  Distribution  Agent's sole
judgment,  is practicable  consistent  with obtaining the best execution of such
sales in light of prevailing market  conditions.  Until the net proceeds of such
sale or sales have been  distributed  to the prior  holders of  Holdings  Common
Stock, the Distribution  Agent will hold such proceeds in trust for such holders
entitled thereto (the "Holdings Common Stock Trust"). All commissions,  transfer
taxes and other  out-of-pocket  transaction  costs,  including  the expenses and
compensation of the Distribution  Agent incurred in connection with such sale of
the  Excess  Shares  will be paid from the  Holdings  Common  Stock  Trust.  The
Distribution Agent will determine the portion of the Holdings Common Stock Trust
to which each  holder is  entitled,  if any,  by  multiplying  the amount of the
aggregate net proceeds comprising the Holdings Common Stock Trust by a fraction,
the numerator of which is the amount of the  fractional  share interest to which
such holder is entitled  (after  taking into account all  Holdings  Common Stock
held at the Effective Time by such  holder) and the denominator of  which is the


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<PAGE>
aggregate  amount of fractional share interests to which all holders of Holdings
Common Stock at the Effective Time are entitled.

         (v)  Notwithstanding  the  provisions of clauses (iii) and (iv) of this
Section  4.2(l)  Holdings  may  elect  at its  option,  exercised  prior  to the
Effective Time, in lieu of the issuance and sale of Excess Shares and the making
of the payments hereinabove contemplated,  to pay each holder of Holdings Common
Stock an amount in cash (without  interest)  equal to the value of such fraction
of a share based upon the closing price of Surviving Corporation Common Stock on
the Nasdaq Stock Market on the date on which the Effective  Time shall occur (or
if the  Surviving  Corporation  Common Stock shall not trade on the Nasdaq Stock
Market on such date, the first day that Surviving Corporation Common Stock shall
trade on the Nasdaq Stock Market  thereafter)  and, in such case, all references
herein  to the  cash  proceeds  of the sale of the  Excess  Shares  and  similar
references  will be deemed to mean and refer to the payments  calculated  as set
forth in this Section 4.2(v).


                                    ARTICLE V

                              ADDITIONAL AGREEMENTS

         5.1 Preparation of S-4 and the Proxy Statement.  LabOne, acting through
the Special Committee,  and Holdings shall promptly prepare the Proxy Statement.
Holdings  shall file with the SEC the S-4, in which the Proxy  Statement will be
included as a prospectus. Holdings shall use its commercially reasonable efforts
to have the S-4  declared  effective  under the  Securities  Act as  promptly as
practicable  after such filing.  Holdings shall use its commercially  reasonable
efforts  to cause  the  Proxy  Statement  and any  supplement  to be  mailed  to
stockholders  of Holdings  at the  earliest  practicable  date.  LabOne,  acting
through the Special Committee,  shall use its commercially reasonable efforts to
cause  the  Proxy  Statement  and  any  supplement   thereto  to  be  mailed  to
stockholders of LabOne at the earliest  practicable date. Holdings shall use its
commercially reasonable efforts to obtain all necessary state securities laws or
"blue sky" permits,  approvals and registrations in connection with the issuance
of Surviving Corporation Common Stock in the Merger.  LabOne, acting through the
Special  Committee,  shall  furnish all  information  concerning  LabOne and the
holders of LabOne Common Stock,  including financial statements required by Form
S-4 and the proxy rules under the Exchange Act, as may be  reasonably  requested
in connection  with obtaining  such permits,  approvals and  registrations.  The
parties  acknowledge that any withdrawal or material  modification of a fairness
opinion  rendered in connection with the approval of this Agreement by the Board
of  Directors  of Holdings or the Special  Committee  and Board of  Directors of
LabOne would be an event requiring  mailing of a supplement to the  stockholders
of the affected company.


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<PAGE>
         5.2 Letter of LabOne's Accountants.  LabOne, acting through the Special
Committee,  shall  use  its  commercially  reasonable  efforts  to  cause  to be
delivered  to  Holdings  a  letter  of KPMG  LLP,  LabOne's  independent  public
accountants,  dated a date within two business days before the date on which the
S-4 shall become  effective and  addressed to LabOne and  Holdings,  in form and
substance  reasonably  satisfactory  to  Holdings  and  customary  in scope  and
substance for letters delivered by independent  public accountants in connection
with registration statements similar to the S-4.

         5.3  Letter  of  Holdings's   Accountants.   Holdings   shall  use  its
commercially  reasonable  efforts to cause to be delivered to LabOne a letter of
KPMG LLP,  Holdings's  independent public  accountants,  dated a date within two
business  days  before  the date on which the S-4  shall  become  effective  and
addressed to Holdings and LabOne, in form and substance reasonably  satisfactory
to  Holdings  and  LabOne  and  customary  in scope and  substance  for  letters
delivered by  independent  public  accountants in connection  with  registration
statements similar to the S-4.

         5.4 Access to  Information.  Upon  reasonable  notice,  LabOne,  acting
through the Special Committee,  and Holdings shall each (and shall cause each of
their   respective   Subsidiaries   to)  afford  to  the  officers,   employees,
accountants,  counsel and other  representatives  of the other,  access,  during
normal  business hours during the period prior to the Effective Time, to all its
properties,  books, contracts,  commitments and records and, during such period,
each of LabOne and  Holdings  shall (and  shall  cause each of their  respective
Subsidiaries  to) furnish  promptly  to the other (a) a copy of each  quarterly,
annual or  current  report on Form  10-Q,  10-K or 8-K,  schedule,  registration
statement and other document filed or received by it during such period pursuant
to SEC  requirements  and (b) all other  information  concerning  its  business,
properties and personnel as such other party may reasonably request,  excluding,
however,  information covered by confidentiality  agreements with third parties.
Each of LabOne,  and  Holdings  agrees that (i) it will not,  and will cause its
respective representatives not to, use any information obtained pursuant to this
Section 5.4 for any purpose  unrelated to the  consummation of the  transactions
contemplated by this Agreement or Holdings's  ownership of LabOne capital stock,
and (ii) will maintain the  confidentiality  of such information,  except to the
extent  required  to be  disclosed  in the  S-4 or the  Proxy  Statement  or any
supplement thereto or as otherwise required by law or legal process.

         5.5  Stockholders  Meetings.  LabOne  and  Holdings  shall  each call a
meeting of its stockholders (respectively,  the "LabOne Stockholder Meeting" and
the  "Holdings   Stockholder  Meeting"  and,   collectively,   the  "Stockholder
Meetings") to be held as promptly as  practicable  after the date hereof for the
purpose of voting upon this Agreement and the Merger.  Subject to the proviso of
the  first  sentence  of  Section  4.1(j),  LabOne  will,  through  its Board of
Directors and in accordance with any  recommendation  by the Special  Committee,
recommend  to its  stockholders  approval of such  matters and not rescind  such
recommendation  and  shall use its  commercially  reasonable  efforts  to obtain
approval and

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<PAGE>
adoption  of  this  Agreement  and the  Merger  by its  stockholders;  provided,
however,  that the Board of  Directors  of LabOne may also  withdraw,  modify or
change its  recommendation  based on a  recommendation  to do so by the  Special
Committee  following  a  withdrawal  or  material  modification  of the  opinion
described  in Section  3.1(q).  Subject to the proviso of the first  sentence of
Section 4.2(j), Holdings will, through its Board of Directors,  recommend to its
stockholders  approval of such matters and not rescind such  recommendation  and
shall use its commercially reasonable efforts to obtain approval and adoption of
this Agreement and the Merger by its stockholders;  provided,  however, that the
Board of  Directors  of  Holdings  may  also  withdraw,  modify  or  change  its
recommendation  following a withdrawal or material  modification  of the opinion
described in Section 3.2(q).  LabOne and Holdings shall coordinate and cooperate
with  respect to the timing of such  meetings  and shall use their  commercially
reasonable efforts to hold such meetings on the same day.

         5.6 Legal  Conditions  to  Merger.  LabOne and  Holdings  will take all
commercially  reasonable  actions  necessary to comply  promptly  with all legal
requirements  that may be  imposed  on such  party  with  respect  to the Merger
(including,  without  limitation,  furnishing all information in connection with
approvals  of or  filings  with  any  Governmental  Entity)  and  will  promptly
cooperate with and furnish information to each other in connection with any such
requirements imposed upon any of them or any of their Subsidiaries in connection
with the Merger.  LabOne will, and will cause its  Subsidiaries to, and Holdings
will, take all  commercially  reasonable  actions  necessary to obtain (and will
cooperate   with  each   other  in   obtaining)   any   consent,   acquiescence,
authorization,  order or approval of, or any exemption or nonopposition  by, any
Governmental  Entity, court or other person or entity required to be obtained or
made by LabOne,  any of its  Subsidiaries  or  Holdings in  connection  with the
Merger or the taking of any action contemplated thereby or by this Agreement.

         5.7  Agreements of Others.  Prior to the Effective  Time,  LabOne shall
cause to be prepared and  delivered to Holdings a list  identifying  all persons
who, at the time of LabOne Stockholder  Meeting may be deemed to be "affiliates"
of LabOne as that term is used in  paragraphs  (c) and (d) of Rule 145 under the
Securities Act (the "Affiliates").  LabOne shall use its commercially reasonable
efforts to cause each person who is  identified as an Affiliate and who will not
be an  Affiliate  of the  Surviving  Corporation  in  such  list to  deliver  to
Holdings,  at or prior to the  Effective  Time, a written  agreement,  in a form
mutually agreeable to LabOne and Holdings whereby each such person  acknowledges
that such person is subject to the provisions of Rule 145(d)  promulgated  under
the Securities Act.

         5.8 Listing.  Holdings shall use its commercially reasonable efforts to
cause  the  shares of  Surviving  Corporation  Common  Stock to be issued in the
Merger, the shares of Surviving  Corporation Common Stock issuable upon exercise
of LabOne Stock Options


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<PAGE>
and  issuable  under LabOne Stock Option Plans to be approved for trading on the
Nasdaq  Stock  Market,  subject to  official  notice of  issuance,  prior to the
Closing Date.

         5.9 Board of Directors and Officers. Holdings and LabOne shall take all
necessary action so that as of the Effective Time the directors of the Surviving
Corporation  shall  only be those  individuals  identified  on Exhibit D hereto,
except to the extent any such individual is unwilling or unable to serve in such
capacity,  and except that prior to the Effective  Time, one  additional  person
with significant  experience in the clinical laboratories industry will be named
as a director by mutual  agreement of the Special  Committee  and  Holdings.  If
prior to the Effective  Time an  individual  identified on Exhibit D hereto as a
director or officer is unwilling or unable to serve in such capacity, any person
proposed to fill such  vacancy  shall be subject to the approval of Holdings and
the Special Committee.

         5.10 Assumption of Plans and Agreements; Stock Options; Reservation and
Registration  of Shares.  (a) Holdings  and LabOne agree that they shall,  at or
prior to the  Effective  Time,  execute  and  deliver  an  assumption  agreement
pursuant  to which  Holdings  will,  from  and  after  the  Effective  Time,  be
substituted for, assume and agree to perform, all obligations of LabOne pursuant
to any LabOne Plans and LabOne  Benefit  Programs  established  or maintained by
LabOne  immediately  prior to the  Effective  Time, in each case as Holdings and
LabOne  may  provide  in such  assumption  agreement.  In  connection  with such
assumption  and without  further action by  shareholders  of LabOne or Holdings,
such plans shall be amended such that all references to LabOne and LabOne Common
Stock  shall  become  references  to the  Surviving  Corporation  and  Surviving
Corporation Common Stock, if provided in the assumption agreement referred to in
the preceding sentence.

         (b) At the  Effective  Time,  each  outstanding  option or  Warrant  to
purchase LabOne Common Stock and any stock  appreciation  rights related thereto
that have been granted  pursuant to LabOne  Stock Option Plans (a "LabOne  Stock
Option"), whether vested or unvested, shall be deemed to constitute an option or
warrant to acquire,  on the same terms and conditions as were  applicable  under
such LabOne Stock Option or Warrants,  as the case may be, a number of shares of
Surviving  Corporation  Common  Stock  equal to the  number  of shares of LabOne
Common Stock  purchasable  pursuant to such LabOne Stock Option or Warrants,  as
the case may be, at a price  per share of  Holdings  Common  Stock  equal to the
per-share  exercise  price for the  shares of LabOne  Common  Stock  purchasable
pursuant to such LabOne Stock Option or Warrants,  as the case may be, provided,
however, that in the case of any option to which Section 421 of the Code applies
by reason of its  qualification  under any of Sections  422-424 of the Code, the
option price, the number of shares  purchasable  pursuant to such option and the
terms and  conditions of exercise of such option shall be determined in order to
comply with Section 424(a) of the Code.


                                       54

<PAGE>
         (c) Holdings shall take all corporate  action  necessary to reserve for
issuance a sufficient number of shares of Surviving Corporation Common Stock for
delivery upon exercise of LabOne Stock Options or Warrants,  as the case may be.
As soon as practicable  after the Effective  Time,  Holdings shall file with the
SEC a  registration  statement  on Form S-8 (or any  successor  form) or another
appropriate  form with  respect to the shares of  Surviving  Corporation  Common
Stock subject to LabOne Stock Options and shall use its commercially  reasonable
efforts  to  maintain  the  effectiveness  of  such  registration  statement  or
registration  statements  (and maintain the current  status of the prospectus or
prospectuses  contained  therein)  for so long as LabOne  Stock  Options  remain
outstanding.

         5.11 Indemnification;  Directors' and Officers' Insurance. (a) From and
after the Effective Time, the Surviving Corporation shall indemnify,  defend and
hold  harmless each person who is now, or has been at any time prior to the date
hereof or who becomes  prior to the  Effective  Time,  an officer or director of
Holdings  or LabOne or any of their  subsidiaries  or an employee of Holdings or
LabOne or any of their  subsidiaries  who acts as a  fiduciary  under any of the
Holdings Benefit Programs, the Holdings Plans, LabOne Benefit Programs or LabOne
Plans,  together  with the  beneficiaries  of such persons upon their death (the
"Indemnified  Parties") against all losses,  claims,  damages,  costs,  expenses
(including  attorneys'  fees  ),  liabilities,  judgments,  penalties  or  fines
(including  excise taxes assessed with respect to an employee  benefit plan), as
well  as  amounts  that  are  paid  in  settlement  with  the  approval  of  the
indemnifying party (which approval shall not be unreasonably withheld),  and all
interest,  assessments and other charges paid or payable in connection  with, or
in  respect  of , any  such  judgments,  fines,  penalties  or  amounts  paid in
settlement,  of or in connection  with any  threatened or actual claim,  action,
suit,  proceeding  or  investigation  based in whole or in part on or arising in
whole or in part out of the fact that such person is or was a director, officer,
or such  employee  of Holdings  or LabOne or any of their  subsidiaries  or as a
fiduciary under any of the Holdings Benefit Programs, the Holdings Plans, LabOne
Benefit Programs or LabOne Plans,  whether  pertaining to any matter existing or
occurring  at or prior to the  Effective  Time and  whether  asserted or claimed
prior  to, or at or  after,  the  Effective  Time  ("Indemnified  Liabilities"),
including all Indemnified  Liabilities  based in whole or in part on, or arising
in whole or in part out of, or pertaining to this Agreement or the  transactions
contemplated hereby. Such indemnification  shall be made to an Indemnified Party
no later than thirty (30) days after receipt by the Surviving Corporation of the
written request of an Indemnified Party,  unless the conduct of such Indemnified
Party resulting in such  Indemnified  Liabilities has been finally adjudged in a
judicial proceeding to have been knowingly fraudulent, deliberately dishonest or
wilful misconduct.

          (b) The Surviving  Corporation  also will pay expenses on an unsecured
basis in advance of the final  disposition  of any such action or proceedings to
each Indemnified Party upon receipt of a written  undertaking by the Indemnified
Party to repay such amount if it is finally adjudged in the judicial  proceeding
in which the Indemnified  Liabilities are imposed that the Indemnified  Party is
not entitled to indemnification. Without limiting


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<PAGE>
the  foregoing,  in the  event  any such  claim,  action,  suit,  proceeding  or
investigation is brought against any Indemnified Parties (whether arising before
or after the Effective Time), (i) the Indemnified  Parties may retain counsel of
their choice (subject to the limitations below) reasonably  satisfactory to them
and the Surviving Corporation,  and the Surviving Corporation shall pay all fees
and expenses of such counsel for the Indemnified  Parties promptly as statements
therefor  are  received;  and  (ii)  the  Surviving  Corporation  will  use  all
commercially  reasonable  efforts to assist in the vigorous  defense of any such
matter,  provided  that the  Surviving  Corporation  shall not be liable for any
settlement effected without its written consent,  which consent,  however, shall
not be unreasonably withheld.

         (c) Any Indemnified Party wishing to claim  indemnification  under this
Section  5.11,  upon  learning of any such claim,  action,  suit,  proceeding or
investigation,  shall notify the  Surviving  Corporation,  but the failure so to
notify  shall not  relieve  the  Surviving  Corporation  from any  liability  to
indemnify  that it may have under this Section  5.11,  except to the extent such
failure materially  increases the amount of indemnification  which the Surviving
Corporation  is  obligated  to pay  hereunder,  in  which  case  the  amount  of
indemnification  the  Indemnified  Party shall be  entitled to receive  shall be
reduced  to an  amount  which the  Surviving  Corporation  proves in a  judicial
proceeding  the  Indemnified  Party would have been entitled to receive had such
notice been timely given. The Indemnified Parties as a group may retain only one
law firm to  represent  them with  respect to each such matter  unless there is,
under  applicable   standards  of  professional   conduct,  a  conflict  on  any
significant issue between the positions of any two or more Indemnified Parties.

         (d) In addition to the indemnification and advances provided for above,
the Surviving  Corporation  shall indemnify an Indemnified Party against any and
all expenses  (including  attorneys'  fees) and, if requested by an  Indemnified
Party, shall (within two business days of such request) advance such expenses to
an Indemnified  Party which are reasonably  incurred by the Indemnified Party in
connection with any claim asserted or action brought by an Indemnified Party for
(i) indemnification or advance payment of expenses by the Surviving  Corporation
under  this  Agreement  or any  other  agreement  or  By-law  of  the  Surviving
Corporation  now or  hereafter  in effect  relating to  Indemnified  Liabilities
and/or (ii) recovery  under any  directors'  and officers'  liability  insurance
policies maintained by Holdings, LabOne or the Surviving Corporation, regardless
of whether an Indemnified  Party ultimately is determined to be entitled to such
indemnification,  advance expense payment or insurance recovery, as the case may
be.

         (e) Holdings and LabOne agree that (i) the rights to indemnification or
advances provided in this agreement shall be enforceable by an Indemnified Party
in any court of competent  jurisdiction and (ii) in any such proceeding in which
the  Surviving  Corporation  is  contesting  an  Indemnified  Party's  right  to
indemnification or advances,  the Surviving Corporation shall bear the burden of
proof.


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<PAGE>
         (f)  LabOne  and  Holdings  agree  that  the  rights  afforded  in this
Agreement  are in  addition  to,  and not in  substitution  for,  all  rights to
indemnification,  including provisions relating to advances of expenses incurred
in defense of any action or suit,  existing in favor of the Indemnified  Parties
(including in the Articles of Incorporation or Bylaws or in the  indemnification
agreements previously provided by Holdings or LabOne to the Indemnified Parties)
with  respect to matters  occurring  through the  Effective  Time,  and all such
rights shall survive the Merger and shall  continue in full force and effect for
a period of six years  from the  Effective  Time;  provided,  however,  that all
rights to indemnification in respect of any Indemnified  Liabilities asserted or
made within such period shall continue until the disposition of such Indemnified
Liabilities.

         (g) After the Effective Time,  Surviving  Corporation shall cause to be
maintained in effect the current policies of directors' and officers'  liability
insurance  maintained  by  Holdings  and  LabOne and its  Subsidiaries  or other
policies of  comparable  coverage and amounts  with  respect to matters  arising
before the  Effective  Time  covering  Indemnified  Parties who are directors or
officers  of  Holdings  or  LabOne  as of the date  hereof  and who  cease to be
employed as a director or officer of the  Surviving  Corporation  after the date
hereof and within six years after the  Effective  Time,  such that if a claim is
made against any such  Indemnified  Person  during the six years  following  the
Effective Time with respect to occurrences  arising prior to the Effective Time,
the Indemnified Person would be covered as if (a) the Indemnified Person has not
ceased to be so employed  or serving as a director,  as the case may be, and (b)
such insurance was still in effect.

         5.12 Public  Announcements.  Prior to the Effective  Time or the sooner
termination of this  Agreement,  Holdings and LabOne (acting through the Special
Committee)  will  consult with each other  before  issuing any press  release or
otherwise  making  any  public  statements  with  respect  to  the  transactions
contemplated  by this Agreement and the contents of such press release or public
statement,  and shall not issue any such press  release or make any such  public
statement  prior to such  consultation,  except as may be required by applicable
law or by  obligations  pursuant  to any  listing  agreement  with any  national
securities exchange or transaction reporting system or legal process.

         5.13 Other Actions.  Except as contemplated by this Agreement,  neither
Holdings nor LabOne shall, and shall not permit any of its Subsidiaries to, take
or agree or commit to take any action that is reasonably likely to result in any
of its respective  representations  or warranties  hereunder being untrue in any
material  respect or in any of the conditions to the Merger set forth in Article
VI not being satisfied. Except as contemplated by this Agreement, upon the terms
and subject to the conditions set forth in this  Agreement,  each of the parties
hereto agrees to use its commercially reasonable efforts to take, or cause to be
taken, all actions,  and to do, or cause to be done, and to assist and cooperate
with the other parties in doing, all things necessary,  proper or advisable,  to
consummate and make effective,  in the most expeditious manner practicable,  the
Merger  and the  other  transactions  contemplated  by this  Agreement.  In this
regard, Holdings and LabOne acknowledge that


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<PAGE>
Holdings may require  financing to consummate the  transaction  contemplated  by
this  Agreement  and  LabOne and  Holdings  agree to use their  respective  best
efforts to obtain such  financing and to cooperate with one another in procuring
such financing.

         5.14 Advice of Changes; SEC Filings. Prior to the Effective Time or the
sooner  termination  of this  Agreement,  Holdings  and LabOne shall confer on a
regular basis with each other, report on operational matters and promptly advise
each  other  orally and in  writing  of any  change or event  having,  or which,
insofar as can reasonably be foreseen,  could have, a Holdings  Material Adverse
Effect or LabOne  Material  Adverse  Effect.  LabOne and Holdings shall promptly
provide each other (or their  respective  counsel) copies of all filings made by
such party with the SEC or any other  state or  federal  Governmental  Entity in
connection with this Agreement and the transactions contemplated hereby.

         5.15 Tax-Free  Transaction.  It is the intention of Holdings and LabOne
that the Merger will qualify as a tax-free transaction described in Sections 332
and 368(a) of the Code (and any  comparable  provisions of  applicable  state or
local  law).   Neither   Holdings  nor  LabOne  (nor  any  of  their  respective
Subsidiaries)  will take or omit to take any action (whether before, on or after
the Closing Date) that would cause the Merger not to be so treated.  The parties
will  characterize  the Merger as such a transaction for purposes of all Returns
and other filings.

         5.16 Employment  Agreements.  Prior to the Effective Time,  LabOne will
use its best commercially  reasonable efforts to amend the employment agreements
of the  persons  in  Schedule  3.1(m)(iii)  of the  LabOne  Letter  so that  the
transactions  contemplated  by this  Agreement  do not  constitute  a "change in
control" under such employment agreements.


                                   ARTICLE VI

                              CONDITIONS PRECEDENT

         6.1  Conditions to Each Party's  Obligation  to Effect the Merger.  The
respective obligation of each party to effect the Merger shall be subject to the
satisfaction prior to the Closing Date of the following conditions:

         (a)      Stockholder Approval.

                  (i) This Agreement and the Merger shall have been approved and
         adopted by the  affirmative  vote of the  holders of a majority  of the
         outstanding  shares of LabOne Common Stock  entitled to vote thereon at
         LabOne Stockholder  Meeting and shall have been approved and adopted by
         the holders of two-thirds of the outstanding  shares of Holdings Common
         Stock entitled to vote thereon at the


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<PAGE>
         Holdings  Stockholder  Meeting.  In addition,  this  Agreement  and the
         Merger  shall have been  approved  by the  holders of a majority of the
         outstanding shares of LabOne Common Stock owned by LabOne  Unaffiliated
         Stockholders  present and voting at the LabOne  Stockholder  Meeting in
         favor of or against the Agreement and the Merger.

                  (ii) The Articles Amendment shall have been adopted, and until
         so adopted this Agreement shall not be effective  except for the second
         sentence of Section 5.4 and except for Section 8.1.

         (b) Listing. The shares of Surviving  Corporation Common Stock issuable
to LabOne  stockholders  pursuant  to this  Agreement  and such other  shares of
Surviving  Corporation  Common  Stock  required to be reserved  for  issuance in
connection  with the Merger and LabOne Plans and LabOne  Benefit  Programs shall
have been  authorized  for trading on the Nasdaq  Stock  Market,  upon  official
notice of issuance.

         (c) Other  Approvals.  All  filings  required  to be made  prior to the
Effective Time with,  and all consents,  approvals,  permits and  authorizations
required to be obtained prior to the Effective Time from any Governmental Entity
or other third  party in  connection  with the  execution  and  delivery of this
Agreement and the consummation of the transactions contemplated hereby by LabOne
and Holdings shall have been made or obtained (as the case may be), except where
the failure to obtain such  consents,  approvals,  permits,  and  authorizations
would not be  reasonably  likely to result in a material  adverse  effect to the
business,  operations,  assets, condition (financial or otherwise) or results of
operation of the Surviving  Corporation  and its  Subsidiaries  taken as a whole
(assuming the Merger has taken place) (a "Surviving Corporation Material Adverse
Effect") or to materially adversely affect the consummation of the Merger.

         (d) S-4. The S-4 shall have become  effective  under the Securities Act
and shall not be the  subject  of any stop order or  proceedings  seeking a stop
order.

         (e) No  Injunctions  or  Restraints.  No temporary  restraining  order,
preliminary  or  permanent  injunction  or other  order  issued  by any court of
competent jurisdiction or other legal restraint or prohibition (an "Injunction")
preventing  the  consummation  of  the  Merger,  or  imposing   conditions  that
compliance  with  which  would  reasonably  be  expected  to  have  a  Surviving
Corporation Material Adverse Effect, shall be in effect.

         (f)  Dissenters.  The  aggregate  number of shares  held by  holders of
Holdings Common Stock who have made demands for appraisal in accordance with the
Missouri  Law shall not  exceed  5.0% of the  shares of  Holdings  Common  Stock
outstanding and entitled to vote at the Holdings Stockholders Meeting.


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<PAGE>
         (g) Tax Opinion.  LabOne and Holdings  shall have  received an opinion,
reasonably satisfactory to both LabOne and Holdings,  dated on or about the date
that is two days  prior  to the date the  Proxy  Statement  is first  mailed  to
stockholders of Holdings,  of Lathrop & Gage L.C.,  counsel to Holdings,  to the
effect that, if the Merger is consummated  in accordance  with the terms of this
Agreement,  no gain or loss will be recognized  for United States federal income
tax  purposes by Holdings,  LabOne,  a  stockholder  of LabOne who makes a Stock
Election  or a  shareholder  of  Holdings  as a result of the Merger or upon the
conversion  of shares of LabOne  Common  Stock and  Holdings  Common  Stock into
shares of Surviving  Corporation  Common Stock,  except with respect to cash, if
any, which is received in lieu of fractional  shares of Holdings Common Stock or
by  shareholders of Holdings who might exercise their  dissenters'  rights under
Missouri  Law,  and that a  stockholder  of LabOne who makes a Cash  Election or
Partial Cash Election will  recognize  taxable income equal to the lesser of the
cash received by such holder and his overall gain on the exchange.

         (h) Stock Split. The Stock Split shall have become effective.

         6.2 Conditions of Obligations of Holdings.  The obligations of Holdings
to  effect  the  Merger  are  subject  to  the  satisfaction  of  the  following
conditions, any or all of which may be waived in whole or in part by Holdings.

         (a)  Representations  and Warranties.  Each of the  representations and
warranties of LabOne set forth in this Agreement shall be true and correct as of
the date of this  Agreement and (except to the extent such  representations  and
warranties  speak as of an  earlier  date) as of the time of the  Closing on the
Closing Date as though made on and as of the time of Closing on the Closing Date
except for such failures to be so true and correct (without giving effect to the
individual  materiality  thresholds  otherwise  contained in Section 3.1 hereof)
which would not,  individually  or in the  aggregate,  reasonably be expected to
have a LabOne Material Adverse Effect.

         (b)  Performance of Obligations of LabOne.  LabOne shall have performed
in all material  respects all  obligations  required to be performed by it under
this Agreement at or prior to the time of Closing on the Closing Date.

         (c) No Vesting of LabOne Stock Options.  LabOne Stock Options shall not
vest, and the  exercisability  thereof shall not accelerate,  as a result of the
Merger and will  maintain  the same vesting  period,  and the time at which they
become exercisable, as if the Merger had not occurred.

         (d) Employment Agreements.  The employees identified in Schedule 6.2 of
the  LabOne  Letter  shall  have  agreed  to  amendments  to  their   employment
agreements,   satisfactory   to  Holdings,   providing  that  the   transactions
contemplated  by this  Agreement do not  constitute a "change in control"  under
such agreements.


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<PAGE>
         (e) Fairness Opinion. The opinion described in Section 3.2(q) shall not
have been  withdrawn or  materially  modified in an adverse  manner prior to the
date of mailing of the Proxy Statement or any supplement thereto.

         (f)  Officers'   Certificate.   Holdings  shall  have  received  (i)  a
certificate  dated as of the Closing  Date and signed on behalf of LabOne by its
chief executive officer or president and by its chief financial officer,  to the
effect  that the  conditions  set forth in Section  6.1 hereof as they relate to
LabOne and in  Section  6.2(a) and (b) have been  satisfied  and (ii)  certified
copies  of  resolutions   duly  adopted  by  LabOne's  Board  of  Directors  and
stockholders  evidencing  the  taking  of  all  corporate  action  necessary  to
authorize the  execution,  delivery and  performance  of this  Agreement and the
consummation of the  transactions  contemplated  hereby,  all in such reasonable
detail as Holdings and its counsel shall reasonably request.

         (g) Letters from  Affiliates.  Holdings  shall have  received from each
person  named in the letter  referred to in Section  5.7 an executed  copy of an
agreement as provided in Section 5.7.

         (h) Financing.  Holdings shall have obtained the financing necessary to
consummate the Merger and other transactions contemplated by this Agreement.

         6.3 Conditions of  Obligations  of LabOne.  The obligation of LabOne to
effect the Merger is subject to the  satisfaction  of the following  conditions,
any or all of which may be waived in whole or in part by LabOne:

         (a)  Representations  and Warranties.  Each of the  representations and
warranties of Holdings set forth in this Agreement  shall be true and correct as
of the date of this Agreement and (except to the extent such representations and
warranties speak as of an earlier date) as of the time of closing on the Closing
Date as though made on and as of the time of closing on the Closing  Date except
for such failures to be so true and correct which (without  giving effect to the
individual  materiality  thresholds  otherwise  contained in Section 3.2 hereof)
would not,  individually  or in the aggregate,  reasonably be expected to have a
Holdings Material Adverse Effect.

         (b)  Performance  of  Obligations  of  Holdings.  Holdings  shall  have
performed in all material  respects all obligations  required to be performed by
it under this Agreement at or prior to the time of Closing on the Closing Date.

         (c) Fairness Opinion. The opinion described in Section 3.1(q) shall not
have been  withdrawn or  materially  modified in an adverse  manner prior to the
date of mailing of the Proxy Statement or any supplement thereto.


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<PAGE>
         (d) Officers' Certificate. LabOne shall have received (i) a certificate
dated as of the  Closing  Date and  signed on behalf  of  Holdings  by its chief
executive  officer and by its chief  financial  officer,  to the effect that the
conditions  set forth in Section 6.1 hereof as they  relate to  Holdings  and in
Section  6.3(a)  and (b) have  been  satisfied  and  (ii)  certified  copies  of
resolutions  duly  adopted by  Holdings's  Board of Directors  and  stockholders
evidencing  the  taking of all  corporate  action  necessary  to  authorize  the
execution,  delivery and  performance of this Agreement and the  consummation of
the transactions  contemplated  hereby,  all in such reasonable detail as LabOne
and its counsel shall reasonably request.

         (e) Board of Directors  and Officers at the  Effective  Time. As of the
closing date,  Holdings  shall have delivered to LabOne  irrevocable  letters of
resignation effective as of the Effective Time from all of the current directors
and  officers of  Holdings.  The  delivery of such  resignations  by officers of
Holdings  shall be deemed to be a  termination  without cause under any existing
employment agreements.

         (f) Financing.  Holdings shall have obtained the financing necessary to
consummate the Merger and other transactions contemplated by this Agreement.



                                   ARTICLE VII

                            TERMINATION AND AMENDMENT

         7.1 Termination. This Agreement may be terminated and the Merger may be
abandoned  at any time  prior to the  Effective  Time,  whether  before or after
approval  of  the  matters  presented  in  connection  with  the  Merger  by the
stockholders of LabOne or Holdings:

         (a) by mutual  written  consent  of LabOne and  Holdings,  or by mutual
action of their  respective  Boards of Directors  which,  in the case of LabOne,
shall  require  the  LabOne  Board of  Directors  to act  consistently  with the
recommendation of the Special Committee;

         (b) by either  LabOne or Holdings if (i) the Merger shall not have been
consummated  by October  31, 1999  (provided  that the right to  terminate  this
Agreement under this clause (i) shall not be available to any party whose breach
of any representation or warranty or failure to fulfill any covenant,  agreement
or  condition  under this  Agreement  has been the cause of or  resulted  in the
failure  of the  Merger  to occur on or  before  such  date);  (ii) any court of
competent jurisdiction,  or some other governmental body or regulatory authority
shall  have  issued  an order,  decree  or  ruling  or taken  any  other  action
permanently restraining,  enjoining or otherwise prohibiting the Merger and such
order, decree, ruling or other action shall have become final and nonappealable;
(iii) the


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<PAGE>
stockholders  of  Holdings  shall not  approve the  Articles  Amendment  or this
Agreement  and  the  Merger  at  the  Holdings  Stockholder  Meeting  or at  any
adjournment thereof in accordance with Section 6.1(a) ; (iv) the stockholders of
LabOne or the Unaffiliated  LabOne Stockholders shall not approve this Agreement
and the Merger at LabOne  Stockholders  Meeting or at any adjournment thereof in
accordance with Section  6.1(a);  (v) in the exercise of its good faith judgment
pursuant  to  Section  4.2(j),  as  advised  by  outside  counsel,  the Board of
Directors of Holdings  determines that such termination is required by reason of
a Holdings  Acquisition  Proposal  having been made , provided that Holdings may
not  terminate  this  Agreement  pursuant to this clause (v) unless two business
days shall have elapsed after  delivery to LabOne of a written  notification  of
Holdings's   intention  to  terminate   this   Agreement  and  during  such  two
business-day period Holdings shall have fully cooperated with LabOne; including,
without  limitation,  informing  LabOne  of the  terms  and  conditions  of such
Holdings  Acquisition  Proposal  and the  identity of the person or group making
such Holdings Acquisition Proposal,  with the intent of enabling LabOne to agree
to a  modification  of the terms and  conditions  of this  Agreement so that the
transactions  contemplated hereby may be effected,  except that such cooperation
and  information  shall not be provided to the extent that the Holdings Board of
Directors  concludes,  in the  exercise  of its good faith  judgment,  that such
action would be inconsistent with its fiduciary duties to Holdings Stockholders,
as advised by outside  counsel to Holdings;  or (vi) in the exercise of its good
faith  judgment  pursuant to Section 4.1(j) as advised by outside  counsel,  the
Board of Directors of LabOne  determines  that such  termination  is required by
reason of a LabOne Acquisition  Proposal having been made,  provided that LabOne
may not  terminate  this  Agreement  pursuant  to this  clause  (vi)  unless two
business  days  shall have  elapsed  after  delivery  to  Holdings  of a written
notification  of LabOne's  intention to terminate this Agreement and during such
two  business-day  period  LabOne  shall have fully  cooperated  with  Holdings;
including, without limitation, informing Holdings of the terms and conditions of
such LabOne Acquisition  Proposal and the identity of the person or group making
such LabOne Acquisition Proposal,  with the intent of enabling Holdings to agree
to a  modification  of the terms and  conditions  of this  Agreement so that the
transactions  contemplated hereby may be effected,  except that such cooperation
and information  shall not be provided to the extent that the Special  Committee
concludes, in the exercise of its good faith judgment, that such action would be
inconsistent with its fiduciary duties to the Unaffiliated LabOne  Stockholders,
as advised by outside counsel to the Special Committee.

         (c) by  Holdings  if (i)  LabOne  shall  have  failed  to comply in any
material respect with any of the covenants,  agreements or conditions  contained
in this Agreement to be complied with or performed by LabOne at or prior to such
date of  termination  (provided  such  breach has not been cured  within 30 days
following  receipt by LabOne of written  notice from Holdings of such breach and
is  existing  at  the  time  of  termination  of  this   Agreement);   (ii)  any
representation  or warranty of LabOne  contained in this Agreement  shall not be
true in all material respects when made (provided such breach has not been cured
within 30 days following receipt by LabOne of written notice from


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<PAGE>
Holdings  of such  breach and is  existing  at the time of  termination  of this
Agreement)  or on and as of  the  Effective  Time  as if  made  on and as of the
Effective  Time (except to the extent it relates to a particular  date),  except
for such  failures  to be so true and  correct  (without  giving  effect  to the
individual  materiality  thresholds  otherwise  contained in Section 3.1 hereof)
which would not individually or in the aggregate, reasonably be expected to have
a LabOne Material Adverse Effect,  (iii) the opinion described in Section 3.2(q)
is withdrawn or materially  modified in an adverse manner,  or (iv) the Board of
Directors of LabOne (acting in accordance with a  recommendation  by the Special
Committee),  in the  exercise  of its good faith  judgment  as to its  fiduciary
duties to its  stockholders  imposed by law,  as  advised  by  outside  counsel,
withdraws,  modifies  or changes its  recommendation  of this  Agreement  or the
Merger in a manner  adverse to Holdings or shall have  resolved to do any of the
foregoing; or

         (d) by  LabOne  if (i)  Holdings  shall  have  failed  to comply in any
material respect with any of the covenants,  agreements or conditions  contained
in this  Agreement  to be complied  with or  performed by it at or prior to such
date of  termination  (provided  such  breach has not been cured  within 30 days
following  receipt by Holdings of written  notice from LabOne of such breach and
is  existing  at  the  time  of  termination  of  this   Agreement);   (ii)  any
representation or warranty of Holdings  contained in this Agreement shall not be
true in all material respects when made (provided such breach has not been cured
within 30 days  following  receipt by Holdings of written  notice from LabOne of
such breach and is existing at the time of termination of this  Agreement) or on
and as of the Effective  Time as if made on and as of the Effective Time (except
to the extent it relates to a particular  date),  except for such failures to be
so true  and  correct  (without  giving  effect  to the  individual  materiality
thresholds   otherwise   contained  in  Section  3.2  hereof)  which  would  not
individually  or in the  aggregate,  reasonably  be  expected to have a Holdings
Material  Adverse  Effect,  (iii) the opinion  described in Section 3.1(q) shall
have been  withdrawn or materially  modified or changed in an adverse  manner or
(iv) the Board of  Directors  of  Holdings,  in the  exercise  of its good faith
judgment  as to its  fiduciary  duties to its  stockholders  imposed by law,  as
advised by outside counsel, withdraws, modifies or changes its recommendation of
this  Agreement  or the  Merger in a manner  adverse  to  LabOne  or shall  have
resolved to do any of the foregoing.

         7.2  Effect of  Termination.  (a) In the event of  termination  of this
Agreement  by either  LabOne or  Holdings  as  provided  in  Section  7.1,  this
Agreement  shall  forthwith  become  void and  there  shall be no  liability  or
obligation  on the part of Holdings or LabOne except (i) with respect to Section
7.2(b) , the second  sentence of Section 5.4 and Section  8.1, and (ii) and such
termination shall not relieve any party hereto for any intentional  breach prior
to  such  termination  by a  party  hereto  of  any of  its  representations  or
warranties or of any of its covenants or agreements set forth in this Agreement.

         (b) If this Agreement is terminated by Holdings pursuant to Section 7.1
(c)(i) or (ii) or by LabOne under Section 7.1(b)(vi),  and if Holdings is not in
material breach of this


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Agreement at the time of such termination,  then LabOne shall pay the reasonable
out-of-pocket  expenses  incurred by Holdings in connection  with preparing for,
entering  into and  carrying  out this  Agreement  and the  consummation  of the
transactions  contemplated  hereby.  If this  Agreement is  terminated by LabOne
pursuant to Section 7.1(d)(i) or (ii) or by Holdings under Section 7.1(b)(v) and
if  LabOne  is not in  material  breach  of this  Agreement  at the time of such
termination,  then  Holdings  shall pay the  reasonable  out-of-pocket  expenses
incurred by LabOne in connection with preparing for,  entering into and carrying
out this Agreement and the consummation of the transactions contemplated hereby.

         7.3 Amendment.  This Agreement may be amended by the parties hereto, by
action taken or authorized by their  respective  Boards of Directors,  which, in
the  case of  LabOne,  shall  require  the  LabOne  Board  of  Directors  to act
consistently  with the  recommendation  of the  Special  Committee,  at any time
before or after approval of the matters  presented in connection with the Merger
by the  stockholders  of LabOne or Holdings,  but, after any such  approval,  no
amendment  shall be made which alters or changes the amount or kind of shares or
other Merger  Consideration to be received by shareholders of LabOne or Holdings
or the  Unaffiliated  LabOne  Stockholders or otherwise alters or changes any of
the terms  and  conditions  of this  Agreement  so as to  adversely  affect  the
shareholders of LabOne or Holdings or the Unaffiliated LabOne Stockholders.
  This Agreement may not be amended except by an instrument in writing signed on
behalf of each of the parties hereto.

         7.4  Extension;  Waiver.  At any time prior to the Effective  Time, the
parties  hereto,  by action taken or  authorized by their  respective  Boards of
Directors  (which,  in the case of LabOne,  shall  require  the LabOne  Board of
Directors to act consistently with the recommendation of the Special Committee),
may, to the extent legally  allowed:  (i) extend the time for the performance of
any of the obligations or other acts of the other parties hereto; (ii) waive any
inaccuracies in the  representations  and warranties  contained herein or in any
document  delivered  pursuant hereto; and (iii) waive compliance with any of the
agreements or conditions  contained herein. Any agreement on the part of a party
hereto to any such  extension  or waiver  shall be valid  only if set forth in a
written instrument signed on behalf of such party.

                                  ARTICLE VIII

                               GENERAL PROVISIONS

         8.1 Payment of Expenses.  Except as provided in Section 7.2, each party
hereto shall pay its own expenses  incident to preparing for,  entering into and
carrying  out  this  Agreement  and  the   consummation   of  the   transactions
contemplated hereby,  provided, that immediately prior to the Effective Time and
after  satisfaction  or waiver of all the  conditions set forth in Article VI of
this Agreement to consummation of the Merger,


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Holdings will  reimburse  LabOne for all of its expenses  incurred in connection
the transactions contemplated by this Agreement.


         8.2 Nonsurvival of Representations,  Warranties and Agreements. None of
the  representations,  warranties  and  agreements  in this  Agreement or in any
instrument delivered pursuant to this Agreement shall survive the Effective Time
and any liability for breach or violation thereof shall terminate absolutely and
be of no further  force and effect at and as of the Effective  Time,  except for
the  agreements  contained in Article II,  Sections  5.8,  5.10 through 5.12 and
Article VIII, and the agreements delivered pursuant to Section 5.7.

         8.3  Notices.  Any  notice  or  communication   required  or  permitted
hereunder shall be in writing and either  delivered  personally,  telegraphed or
telecopied or sent by certified or registered mail,  postage prepaid,  and shall
be  deemed  to be  given,  dated  and  received  when so  delivered  personally,
telegraphed  or telecopied  or, if mailed,  five business days after the date of
mailing to the following address or telecopy number, or to such other address or
addresses as such person may subsequently designate by notice given hereunder:


         (a)      if to Holdings:
                  P. Anthony Jacobs
                  President and Chief Executive Officer
                  Lab Holdings, Inc.
                  5000 West 95th Street
                  Suite 260, P.O. Box 7568
                  Shawnee Mission, Kansas 66207
                  Phone:  (913) 648-3600
                  Fax:      (913) 648-0037

                  with a copy to:

                  John H. Calvert, Esq.
                  Lathrop & Gage L.C.
                  2345 Grand Blvd.
                  Kansas City, Missouri 64108
                  Phone:  (816) 460-5807
                  Fax:     (816) 292-2001

      (b)         if to LabOne, to:

                  Richard S. Schweiker
                  Chairman


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<PAGE>
                  Special Committee
                  LabOne, Inc.
                  10101 Renner Blvd.
                  Lenexa, Kansas 66219
                  Phone (913) 888-1770
                  Fax (913) 888-8343

                  W. Thomas Grant II
                  President and Chief Executive Officer
                  LabOne, Inc.
                  10101 Renner Blvd.
                  Lenexa, Kansas 66219
                  Phone (913) 888-1770 ext. 1250
                  Fax (913) 888-8343

                  John A. Granda
                  Stinson, Mag & Fizzell, P.C.
                  1201 Walnut
                  Suite 2800
                  P.O. Box 419251
                  Kansas City, Missouri 64141
                  Phone: 816-842-8600
                  Fax: 816-691-3495

                  and with a copy to:

                  Whitney F. Miller, Esq.
                  Morrison & Hecker L.L.P.
                  2600 Grand Avenue
                  Kansas City, Missouri 64108-4606
                  Phone: (816) 691-2763
                  Fax:    (816) 474-4208

      8.4  Interpretation.  When a  reference  is  made  in  this  Agreement  to
Sections,  such  reference  shall  be to a  Section  of  this  Agreement  unless
otherwise  indicated.  The table of  contents,  glossary  of  defined  terms and
headings  contained in this Agreement are for reference  purposes only and shall
not affect in any way the meaning or interpretation of this Agreement.  Whenever
the word "include,"  "includes" or "including" are used in this Agreement,  they
shall be deemed to be followed  by the words  "without  limitation."  The phrase
"made  available" in this Agreement shall mean that the information  referred to
has been made available if requested by the party to whom such information is to
be made available.  Unless the context otherwise  requires,  "or" is disjunctive
but not necessarily exclusive,  and words in the singular include the plural and
in the plural include


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<PAGE>
the singular. Any representations and warranties of LabOne that are qualified by
the phrase "to the knowledge of LabOne" or phrases with similar wording shall be
interpreted  to refer to the actual  knowledge of the  individuals  set forth on
Schedule  8.4 of the  LabOne  Letter.  Any  representations  and  warranties  of
Holdings  that are  qualified  by the phrase "to the  knowledge  of Holdings" or
phrases  with  similar  wording  shall be  interpreted  to  refer to the  actual
knowledge of the individuals set forth on Schedule 8.4 of the Holdings Letter.

      8.5  Counterparts.   This  Agreement  may  be  executed  in  two  or  more
counterparts,  all of which shall be considered  one and the same  agreement and
shall become effective when two or more counterparts have been signed by each of
the parties and delivered to the other  parties,  it being  understood  that all
parties need not sign the same counterpart.

      8.6  Entire  Agreement;  No  Third  Party  Beneficiaries.  This  Agreement
(together  with any other  documents  and  instruments  referred  to herein) (a)
constitutes  the  entire  agreement  and  supersedes  all prior  agreements  and
understandings,  both  written and oral,  among the parties  with respect to the
subject  matter  hereto and (b) except as provided in Sections 5.7 and 5.11,  is
not intended to confer upon any person other than the parties  hereto any rights
or remedies hereunder.

      8.7  Governing  Law.  Except to the  extent  that the laws of the State of
Delaware are mandatorily applicable to the Merger or the internal affairs of any
of the parties,  this  Agreement  shall be governed and  construed in accordance
with the laws of the State of Missouri,  without giving effect to the principles
of conflicts of law thereof.

      8.8  Severability.  Each  party  agrees  that,  should  any court or other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith or not to take an action  consistent  herewith or required hereby,  the
validity,   legality  and   enforceability  of  the  remaining   provisions  and
obligations  contained  or set forth  herein shall not in any way be affected or
impaired  thereby,  unless the foregoing  inconsistent  action or the failure to
take an action  constitutes  a material  breach of this  Agreement  or makes the
Agreement  impossible to perform in which case this Agreement shall terminate as
if the parties mutually agreed under Section 7.1(a).

      8.9 Assignment. Neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto (whether by
operation of law or otherwise)  without the prior  written  consent of the other
parties. Subject to the preceding sentence, this Agreement will be binding upon,
inure to the benefit of and be enforceable  by the parties and their  respective
successors and assigns.


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<PAGE>
      IN WITNESS  WHEREOF,  each party has caused this Agreement to be signed by
its  respective  officers  thereunto duly  authorized,  all as of the date first
written above.

                              LAB HOLDINGS, INC.


                              By:s/P. Anthony Jacobs   
                              Name:     P. Anthony Jacobs
                              Title:    President and Chief Executive Officer



                              LABONE, INC.


                              By:s/W. Thomas Grant II   
                              Name:     W. Thomas Grant II
                              Title:    Chairman of the Board, President and
                                        Chief Executive Officer





























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