SCICLONE PHARMACEUTICALS INC
8-K, 1997-10-14
PHARMACEUTICAL PREPARATIONS
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                       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): July 25, 1997




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

                         SCICLONE PHARMACEUTICALS, INC.
             (Exact name of registrant as specified in its charter)

  California                      0-19825                         94-3116852
  ----------                      -------                         ----------
(State or other             (Commission File No.)               (IRS Employer
  jurisdiction                                               Identification No.)
of incorporation)


901 Mariners Island Blvd.
Suite 315
San Mateo, California                                                    94404
- ---------------------                                                    -----
(Address of principal executive offices)                              (Zip Code)


Registrant's telephone number, including area code:  (415) 358-3456
                                                     --------------


<PAGE>


Item 5.  Other Events.

         (a) Adoption of Rights Agreement.

         On July 25, 1997,  the Board of Directors of SciClone  Pharmaceuticals,
Inc. (the  "Company")  declared a dividend  distribution  of one Preferred Stock
Purchase  Right  (each  a  "Right"  and  collectively  the  "Rights")  for  each
outstanding  share of  Common  Stock,  no par  value  ("Common  Stock"),  of the
Company. The distribution was paid as of August 15, 1997 (the "Record Date"), to
shareholders of record on that date.  Each Right entitles the registered  holder
to  purchase  from the  Company one  one-hundredth  of a share of the  Company's
Series B Preferred  Stock, no par value (the "Preferred  Stock"),  at a price of
$30.00 (the "Purchase  Price").  The description and terms of the Rights are set
forth  in  the  Rights  Agreement  dated  as  of  July  25,  1997  (the  "Rights
Agreement"),  between the Company and ChaseMellon  Shareholder Services,  L.L.C.
(the "Rights Agent").

         Until the  earlier  to occur of (i) the tenth day  following  the first
date of public announcement by the Company or by a person or group of affiliated
or  associated  persons  ("Acquiring  Person")  other  than the  Company  or any
subsidiary of the Company or any employee benefit plan or employee stock plan of
the Company including, without limitation, in its fiduciary capacity, any of any
subsidiary of the Company  individual,  firm,  corporation,  or any partnership,
trust or other entity (a "Person") organized, appointed,  established or holding
Common Stock for or pursuant to the terms of any such plan or any Person funding
other  employee  benefits for employees of the Company or any  Subsidiary of the
Company  ("Exempt  Person"),  that such an  Acquiring  Person has  acquired,  or
obtained  the right to acquire,  without  approval of the Board of  Directors or
good faith  determination  of the Board of Directors that such a person or group
of  affiliated  or  associated  persons has  inadvertently  become an  Acquiring
Person,  beneficial  ownership of securities of the Company  representing 15% or
more of the  outstanding  Common  Stock of the  Company  (other than solely as a
result of a  reduction  in the  outstanding  shares of the  Common  Stock of the
Company)  or such  earlier  date as a majority of the Board of  Directors  shall
become aware of such  acquisition  of the Common  Stock (the "Stock  Acquisition
Date") (or, if the tenth day after the Stock  Acquisition Date occurs before the
Record  Date,  the  close of  business  on the  Record  Date) or (ii) the  tenth
business  day  (subject  to  extension  by the Board  prior to the time a person
becomes  an  Acquiring   Person)   following  the  commencement  of,  or  public
announcement  of an  intention to  commence,  a tender or exchange  offer by any
person (other than by an Exempt Person),  the consummation of which would result
in the beneficial  ownership of 15% or more of the  outstanding  Common Stock by
such person,  together with its affiliates  and associates  (the earlier of such
dates being called the "Distribution Date"), the Rights will be evidenced,  with
respect to all shares of Common  Stock  that are  issued  after the Record  Date
prior to the  Distribution  Date (or earlier  redemption  or  expiration  of the
Rights), by certificates  representing such shares of Common Stock together with
the Summary of Rights attached thereto.

         The Rights Agreement  provides that,  until the  Distribution  Date (or
earlier redemption or expiration of the Rights),  the Rights will be represented
by and transferred with, and only with, the Common Stock. Until the Distribution
Date (or earlier  redemption  or  expiration  of the

                                       2

<PAGE>


Rights),   new  certificates   issued  for  Common  Stock  (including,   without
limitation, certificates issued upon transfer or exchange of Common Stock) after
the Record Date,  will contain a legend  incorporating  the Rights  Agreement by
reference.  Until the Distribution Date (or earlier  redemption or expiration of
the Rights),  the surrender  for transfer of any of the  Company's  Common Stock
certificates,  with or without  the  aforesaid  legend or the  Summary of Rights
attached  thereto,  will also  constitute the transfer of the Rights  associated
with the Common Stock  represented by such  certificate.  As soon as practicable
following the Distribution  Date,  separate  certificates  evidencing the Rights
("Right  Certificates")  will be mailed to  holders  of record of the  Company's
Common  Stock as of the close of business  on the  Distribution  Date,  and such
separate  certificates  alone  will  evidence  the  Rights  from and  after  the
Distribution Date.

         The Rights are not exercisable until the Distribution  Date. The Rights
will expire upon the  earlier of (i) ten years  after the date of  issuance,  or
July 24, 2007 or (ii) redemption or exchange by the Company.

         The Purchase Price payable, and the number of shares of Preferred Stock
or other  securities  or  property  issuable,  upon  exercise  of the Rights are
subject to adjustment from time to time to prevent  dilution (i) in the event of
a stock dividend on, or a subdivision,  combination or  reclassification  of the
Preferred  Stock,  (ii)  upon the grant to  holders  of the  Preferred  Stock of
certain  rights or warrants to  subscribe  for  Preferred  Stock or  convertible
securities at less than the current market price of the Preferred Stock or (iii)
upon  the  distribution  to  holders  of the  Preferred  Stock of  evidences  of
indebtedness or assets  (excluding  dividends  payable in Preferred Stock) or of
subscription rights or warrants (other than those referred to above). The number
of  Rights  associated  with  each  share of  Common  Stock is also  subject  to
adjustment in the event of a stock split of the Common Stock or a stock dividend
on the Common Stock payable in Common Stock or subdivisions,  consolidations  or
combinations  of the Common  Stock  occurring,  in any such  case,  prior to the
Distribution Date.

         The  Preferred  Stock  purchasable  upon exercise of the Rights will be
nonredeemable  and junior to any other series of preferred stock the Company may
issue (unless otherwise provided in the terms of such other series).  Each share
of Preferred Stock will have a preferential  cumulative quarterly dividend in an
amount equal to the greater of (a) $75.00 or (b) 100 times the dividend declared
on each  share of Common  Stock.  In the event of  liquidation,  the  holders of
Preferred  Stock  will  receive a  preferred  liquidation  payment  equal to the
greater  of (a)  $3,000  per  share,  plus  accrued  dividends  to the  date  of
distribution whether or not earned or declared, or (b) an amount per share equal
to 100 times the aggregate  payment to be distributed per share of Common Stock.
Each share of  Preferred  Stock will have 100 votes,  voting  together  with the
shares  of Common  Stock.  In the event of any  merger,  consolidation  or other
transaction  in which shares of Common Stock are  exchanged  for or changed into
other securities, cash and/or other property, each share of Preferred Stock will
be entitled to receive 100 times the amount and type of  consideration  received
per share of Common Stock.  The rights of the  Preferred  Stock as to dividends,
liquidation  and  voting,  and in the event of mergers and  consolidations,  are
protected by customary anti-dilution provisions.  Fractional shares (in integral
multiples of one  one-hundredth)  of Preferred Stock will be issuable;  however,
the  Company  may  elect  to  distribute  depositary  receipts  in  lieu of such
fractional  shares.  In lieu of fractional  shares other than fractions that are

                                       3

<PAGE>


multiples of one  one-hundredth  of a share,  an adjustment in cash will be made
based on the market price of the Preferred  Stock on the last trading date prior
to the  date  of  exercise.  Because  of the  nature  of the  Preferred  Stock's
dividend,  liquidation and voting rights,  the value of one  one-hundredth  of a
share  of  Preferred  Stock  purchasable  upon  exercise  of each  Right  should
approximate the value of one share of Common Stock.

         In the event (i) any  person  becomes an  Acquiring  Person or (ii) any
Acquiring Person or any of its Affiliates or Associates, directly or indirectly,
(1)  consolidates  with or merges into the Company or any of its subsidiaries or
otherwise  combines with the Company or any of its subsidiaries in a transaction
in  which  the  Company  or  such  subsidiary  is the  continuing  or  surviving
corporation  of such merger or  combination  and the Common Stock of the Company
remains outstanding and no shares thereof shall be changed into or exchanged for
stock or other  securities  of any other person or of the Company or cash or any
other property, (2) transfers, in on one or more transactions, any assets to the
Company or any of its  subsidiaries in exchange for capital stock of the Company
or any of its subsidiaries or for securities exercisable for or convertible into
capital  stock of the Company or any of its  subsidiaries  or otherwise  obtains
from the Company or any of its subsidiaries, with or without consideration,  any
capital  stock  of  the  Company  or  any  of  its  subsidiaries  or  securities
exercisable  for or convertible  into capital stock of the Company or any of its
subsidiaries  (other  than as part of a pro rata  offer or  distribution  to all
holders of such stock),  (3) sells,  purchases,  leases,  exchanges,  mortgages,
pledges,  transfers or otherwise disposes to, from or with the Company or any of
its  subsidiaries,  as the case may be,  assets  on terms  and  conditions  less
favorable to the Company or such  subsidiary than the Company or such subsidiary
would be able to obtain in arm's-length  negotiation with an unaffiliated  third
party, (4) receives any compensation from the Company or any of its subsidiaries
for services  other than  compensation  for employment as a regular or part-time
employee,  or fees for  serving as a director  at rates in  accordance  with the
Company's (or its subsidiary's) past practice,  (5) receives the benefit (except
proportionately as a shareholder) of any loans, advances, guarantees, pledges or
other  financial  assistance or tax credit or  advantage,  or (6) engages in any
transaction  with the Company (or any of its  subsidiaries)  involving the sale,
license,  transfer  or grant of any right in, or  disclosure  of,  any  patents,
copyrights,  trade secrets, trademarks or know-how (or any other intellectual or
industrial property rights recognized under any country's  intellectual property
rights  laws) which the Company  (including  its  subsidiaries)  owns or has the
right to use on terms and  conditions  not approved by the Board of Directors of
the Company, or (iii) while there is an Acquiring Person,  there shall occur any
reclassification  of  securities   (including  any  reverse  stock  split),  any
recapitalization  of the Company,  or any merger or consolidation of the Company
with any of its subsidiaries or any other transaction or transactions  involving
the Company or any of its  subsidiaries  (whether or not involving the Acquiring
Person) which have the effect of  increasing  by more than 1% the  proportionate
share of the outstanding shares of any class of equity securities of the Company
or any of its  subsidiaries  which is directly or indirectly owned or controlled
by the Acquiring Person (such events are collectively  referred to herein as the
"Flip-In  Events"),  then,  and in each such  case,  each  holder of record of a
Right,  other  than the  Acquiring  Person,  will  thereafter  have the right to
receive,  upon  payment  of the  then  current  Purchase  Price,  in lieu of one
one-hundredth of a share of Preferred Stock per outstanding  Right,  that number
of shares of Common Stock  having a market value at the time of the  transaction
equal to the  Purchase  Price  (as  adjusted  to the  Purchase  Price in  effect

                                       4

<PAGE>


immediately  prior  to  the  Flip-In  Event  multiplied  by  the  number  of one
one-hundredths  of a share of Preferred  Stock for which a Right was exercisable
immediately  prior to such Flip-In Event) divided by one-half the average of the
daily  closing  prices per share of the Common Stock for the thirty  consecutive
trading  days  ("Current  Market  Price")  on the  date of such  Flip-In  Event.
Notwithstanding  the  foregoing,  Rights  held by the  Acquiring  Person  or any
Associate or Affiliate thereof or certain  transferees will be null and void and
no longer be transferable.

         The Company may at its option  substitute  for a share of Common  Stock
issuable  upon the exercise of Rights in  accordance  with this  paragraph  such
number or  fractions of shares of  Preferred  Stock having an aggregate  current
market value equal to the Current  Market Price of a share of Common  Stock.  In
the event that  insufficient  shares of Common Stock are available to permit the
exercise in full of the Rights in accordance with the foregoing  paragraph,  the
Board of Directors  shall,  to the extent  permitted by  applicable  law and any
material  agreements  then in  effect  to which  the  Company  is a  party,  (A)
determine the excess (such excess,  the "Spread") of (1) the value of the shares
of Common Stock  issuable upon the exercise of a Right in  accordance  with this
paragraph  (the  "Current  Value")  over (2) the  Purchase  Price,  and (B) with
respect to each Right (other than Rights which have become void  pursuant to the
foregoing  paragraph),  make adequate  provision to substitute for the shares of
Common Stock  issuable in accordance  with this  paragraph  upon exercise of the
Right and payment of the  Purchase  Price,  (1) cash,  (2) a  reduction  in such
Purchase Price, (3) shares of Preferred Stock or other equity  securities of the
Company  (including,  without  limitation,  shares  or  fractions  of  shares of
preferred  stock which,  by virtue of having  dividend,  voting and  liquidation
rights  substantially  comparable  to those of the shares of Common  Stock,  are
deemed in good faith by the Board of  Directors to have  substantially  the same
value as the shares of Common Stock,  (4) debt  securities  of the Company,  (5)
other assets,  or (6) any  combination of the  foregoing,  having a value which,
when  added to the value of the  shares of Common  Stock  actually  issued  upon
exercise of such Right, shall have an aggregate value equal to the Current Value
(less the amount of any reduction in such Purchase  Price);  provided,  however,
that if the Company shall not make adequate  provision to deliver value pursuant
to clause (B) above within thirty (30) days  following the Flip-In  Event,  then
the Company shall be obligated to deliver, to the extent permitted by applicable
law and any material  agreements then in effect to which the Company is a party,
upon the surrender for exercise of a Right and without requiring payment of such
Purchase Price,  shares of Common Stock (to the extent available),  and then, if
necessary,  such number or fractions of shares of Preferred Stock (to the extent
available)  and then,  if  necessary,  cash,  which  shares  and/or cash have an
aggregate value equal to the Spread.  Rights are not  exercisable  following the
occurrence  of the  events  set  forth  in the  foregoing  paragraph  until  the
expiration  of the period  during  which the Rights may be redeemed as described
below.

         Unless the Rights are earlier redeemed, in the event that following the
first occurrence of a Flip-In Event, the Company were to be acquired in a merger
or other business  combination in which any shares of the Company's Common Stock
are exchanged or converted  for other  securities or assets (other than a merger
or other  business  combination  in which the voting  power  represented  by the
Company's  securities   outstanding   immediately  prior  thereto  continues  to
represent all of the voting power  represented  by the securities of the Company
thereafter  and the holders of such  securities  have not changed as a result of
such transaction),  or 50% or more of the

                                       5

<PAGE>


assets or earning power of the Company and its  subsidiaries  (taken as a whole)
were to be sold or transferred in one or a series of related  transactions (such
transactions are collectively referred to herein as the "Flip-Over Events"), the
Rights  Agreement  provides  that  proper  provision  shall be made so that each
holder of record of a Right (other than an Acquiring  Person,  or  affiliates or
associates  thereof)  will from and after  such date have the right to  receive,
upon payment of the then current Purchase Price, that number of shares of common
stock  of the  acquiring  company  having  a  market  value  at the time of such
transaction  equal to the Purchase  Price divided by one-half the Current Market
Price of such common stock.

         No  fractional  shares of Common Stock will be issued upon  exercise of
the Rights and, in lieu thereof, a payment in cash will be made to the holder of
such Rights equal to the same fraction of the current market value of a share of
Common Stock.

         At any time  until the  occurrence  of a Flip-In  Event,  the Board may
redeem  the  Rights in whole,  but not in part,  at a price of $.001 per  Right.
Immediately upon the action of the Board of Directors of the Company authorizing
redemption of the Rights,  the right to exercise the Rights will terminate,  and
the only right of the holders of Rights will be to receive the Redemption  Price
without any interest thereon.

         At any time after the  occurrence  of a Flip-In  Event and prior to the
earlier of a  Flip-Over  Event or such time as any Person  (other than an Exempt
Person),  together with all  Affiliates and  Associates,  becomes the Beneficial
Owner of more than 50% of the Common Stock  outstanding,  the Board of Directors
of the  Company  may,  at  its  option,  exchange  all  or  any  portion  of the
outstanding  Rights (other than Rights held by any  Acquiring  Person which have
become  void) for shares of Common  Stock on a pro rata  basis,  at an  exchange
ratio of one share of Common Stock or one  one-hundredth of a share of Preferred
Stock  (or of a share of a class or  series  of the  Company's  Preferred  Stock
having  equivalent  rights,  preferences and privileges) per Right.  Immediately
upon the ordering of such exchange and without any notice, the right to exercise
such Rights shall  terminate  and the only right  thereafter of a holder of such
Rights shall be to receive  shares of Common  Stock or Common Stock  Equivalents
pursuant to the exchange.  In the event there are insufficient  shares of Common
Stock  issued but not  outstanding  or  authorized  but  unissued  to permit any
exchange of Rights,  the Company  shall take all actions  necessary to authorize
additional shares.

         Until the Rights  become  nonredeemable  the Company  may,  except with
respect to the redemption price of the Rights, amend the Rights Agreement in any
manner. After the Rights become nonredeemable,  the Company may amend the Rights
Agreement to cure any ambiguity,  to correct or supplement  any provision  which
may be  defective  or  inconsistent  with any other  provisions,  to  shorten or
lengthen any time period under the Rights Agreement, or to arrange or supplement
the  provisions  hereunder in any manner which the Company may deem necessary or
desirable, provided that no such amendment may adversely affect the interests of
the holders of the Rights (other than the Acquiring  Person or its affiliates or
associates) or cause the Rights to again be redeemable or the Agreement to again
be freely amendable.

                                       6

<PAGE>


         Until a Right is exercised, the holder, as such, will have no rights as
a shareholder of the Company,  including,  without limitation, the right to vote
or to receive dividends.

         The  issuance  of the  Rights  is not  taxable  to  the  Company  or to
shareholders  under  presently  existing  federal  income tax law,  and will not
change the way in which shareholders can presently trade the Company's shares of
Common Stock. If the Rights should become exercisable,  shareholders,  depending
on then existing circumstances, may recognize taxable income.

         The  Rights  have  certain   anti-takeover   effects.   Under   certain
circumstances the Rights could cause  substantial  dilution to a person or group
who attempts to acquire the Company on terms not approved by the Company's Board
of Directors.  However, the Rights should not interfere with any merger or other
business combination approved by the Board.

         The form of  Rights  Agreement  between  the  Company  and  ChaseMellon
Shareholder  Services,  L.L.C., as Rights Agent (including as Exhibit A the form
of  Certificate of  Determination  Regarding the Terms of the Series B Preferred
Stock, as Exhibit B the form of Right Certificate,  and as Exhibit C the Summary
of Terms of Rights  Agreement),  the Company's press release dated July 29, 1997
and a form of letter to the  Company's  shareholders  dated  August 26, 1997 are
attached  hereto as  Exhibit  1,  Exhibit 2 and  Exhibit  3,  respectively,  and
incorporated  herein by reference.  The foregoing  description  of the Rights is
qualified in its entirety by reference to such exhibits.

Item 7.  Financial Statements and Exhibits.

         The form of  Rights  Agreement  between  the  Company  and  ChaseMellon
Shareholder  Services,  L.L.C., as Rights Agent (including as Exhibit A the form
of  Certificate of  Determination  Regarding the Terms of the Series B Preferred
Stock, as Exhibit B the form of Right Certificate,  and as Exhibit C the Summary
of Terms of Rights  Agreement),  the Company's press release dated July 29, 1997
and a form of letter to the  Company's  shareholders  dated  August 26, 1997 are
attached  hereto as  Exhibit  1,  Exhibit 2 and  Exhibit  3,  respectively,  and
incorporated herein by reference.

                                       7

<PAGE>


                                   SIGNATURES

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

                                                 SCICLONE PHARMACEUTICALS, INC.


Date:  October 14, 1997                          By: /S/ Mark A. Culhane
                                                    ----------------------------
                                                    Mark A. Culhane
                                                    Vice President,  Finance and
                                                    Administration   and   Chief
                                                    Financial Officer (Principal
                                                    Financial & Accounting
                                                    Officer)

                                       8

<PAGE>


                                  EXHIBIT INDEX


 Exhibit                            Description
 -------                            -----------
   1     Form of Rights  Agreement  between SciClone  Pharmaceuticals,  Inc. and
         ChaseMellon Shareholder Services, L.L.C., as Rights Agent (including as
         Exhibit A the form of Certificate of Determination  Regarding the Terms
         of the  Series  B  Preferred  Stock,  as  Exhibit  B the  form of Right
         Certificate,   and  as  Exhibit  C  the  Summary  of  Terms  of  Rights
         Agreement).

   2     Press Release, dated July 29, 1997.

   3     Form of Letter to shareholders of SciClone Pharmaceuticals, Inc., dated
         August 26, 1997.






                         SCICLONE PHARMACEUTICALS, INC.

                                       AND

                      CHASEMELLON SHAREHOLDER SERVICES, LLC

                                  Rights Agent




                                RIGHTS AGREEMENT

                            Dated as of July 25, 1997


<PAGE>

<TABLE>

<CAPTION>
                                                  TABLE OF CONTENTS                                              Page
                                                  -----------------                                              ----
<S>      <C>                                                                                                      <C>
1.       Certain Definitions......................................................................................1

2.       Appointment of Rights Agent..............................................................................5

3.       Issuance of Right Certificates...........................................................................6

4.       Form of Right Certificates...............................................................................7

5.       Countersignature and Registration........................................................................8

6.       Transfer, Split Up, Combination and Exchange of Right Certificates; Mutilated, Destroyed, Lost
         or Stolen Right Certificates.............................................................................9

7.       Exercise of Rights; Purchase Price; Expiration Date of Rights............................................9

8.       Cancellation and Destruction of Right Certificates......................................................11

9.       Reservation and Availability of Shares of Preferred Stock...............................................11

10.      Preferred Stock Record Date.............................................................................12

11.      Adjustments to Number and Kind of Shares, Number of Rights or Purchase Price............................12

12.      Certification of Adjustments............................................................................21

13.      Consolidation, Merger or Sale or Transfer of Assets or Earning Power....................................22

14.      Fractional Rights and Fractional Shares.................................................................25

15.      Rights of Action........................................................................................26

16.      Agreement of Right Holders..............................................................................26

17.      Right Certificate Holder Not Deemed a Stockholder.......................................................27

18.      Concerning the Rights Agent.............................................................................27

19.      Merger or Consolidation or Changed Name of Rights Agent.................................................28

20.      Duties of Rights Agent..................................................................................28

21.      Change of Rights Agent..................................................................................30

22.      Issuance of New Right Certificates......................................................................31

23.      Redemption..............................................................................................32

                                                         i

<PAGE>


                                                  TABLE OF CONTENTS                                              Page
                                                  -----------------                                              ----
                                                    (continued)

24.      Exchange of Rights for Common Stock.....................................................................32

25.      Notice of Proposed Actions..............................................................................34

26.      Notices.................................................................................................35

27.      Supplements and Amendments..............................................................................35

28.      Successors..............................................................................................36

29.      Benefits of this Rights Agreement.......................................................................36

30.      Governing Law...........................................................................................36

31.      Counterparts............................................................................................36

32.      Descriptive Headings....................................................................................36

33.      Severability............................................................................................36

</TABLE>

                                                         ii

<PAGE>


                                RIGHTS AGREEMENT

This Rights Agreement ("Rights Agreement"), is dated as of July 25, 1997 between
SciClone  Pharmaceuticals,  Inc., a California (the "Company"),  and ChaseMellon
Shareholder Services, LLC (the "Rights Agent").


                              W I T N E S S E T H:

WHEREAS,  the Board of Directors of the Company on July 25, 1997 (i)  authorized
the issuance and  declared a dividend of one right  ("Right")  for each share of
the common stock of the Company ("Common Stock")  outstanding as of the Close of
Business (as such term is  hereinafter  defined) on Augsut 15, 1997 (the "Record
Date"),  each Right  representing  the right to purchase one  one-hundredth of a
share of Series B Preferred  Stock of the Company having the rights,  powers and
preferences set forth in the form of Certificate of Designation  attached hereto
as Exhibit A upon the terms and subject to the conditions hereinafter set forth,
and (ii) further authorized the issuance of one Right with respect to each share
of Common Stock of the Company that shall become outstanding  between August 15,
1997, and the Distribution Date (as such term is hereinafter defined);

NOW,  THEREFORE,  in  consideration  of the premises  and the mutual  agreements
herein set forth, the parties agree as follows:

     1. Certain Definitions.  For purposes of this Agreement the following terms
shall have the meanings indicated:

        (a)  "Acquiring   Person"  shall  mean  any  Person  (as  such  term  is
hereinafter defined) who or which, together with all Affiliates (as such term is
hereinafter  defined) and Associates  (as such term is  hereinafter  defined) of
such Person, without the prior approval of the Board of Directors,  shall be the
Beneficial Owner (as such term is hereinafter  defined) of fifteen percent (15%)
or more of the outstanding  Common Stock;  provided,  however,  that in no event
shall a Person who or which, together with all Affiliates and Associates of such
Person,  is the Beneficial  Owner of less than 15% of the Company's  outstanding
shares  of Common  Stock,  become an  Acquiring  Person  solely as a result of a
reduction  of the  number of  shares  of  outstanding  Common  Stock,  including
repurchases  of  outstanding  shares  of  Common  Stock  by the  Company,  which
reduction  increases  the  percentage  of  outstanding  shares of  Common  Stock
beneficially  owned by such Person,  provided,  however,  that if a Person shall
become the Beneficial Owner of 15% or more of the Company's  outstanding  shares
of Common Stock then  outstanding  solely by reason of a reduction of the number
of  shares  of  outstanding  Common  Stock,  and  shall  thereafter  become  the
Beneficial Owner of any additional  shares of Common Stock of the Company,  then
such  Person  shall  be  deemed  to be an  "Acquiring  Person"  unless  upon the
consummation of the  acquisition of such additional  shares of Common Stock such
person does not own fifteen  percent (15%) or more of the shares of Common Stock
then  outstanding,  and provided  further,  that an  Acquiring  Person shall not
include  an  Exempt  Person  (as  such  term  is   hereinafter   defined)  or  a
Grandfathered  Person (as such term is hereinafter  defined);  provided  further
that a Grandfathered Person shall become an Acquiring Person if,

                                       1

<PAGE>


(i) without  the prior  approval of the Board of  Directors,  the  Grandfathered
Person  becomes  the  Beneficial  Owner of an  additional  number of shares,  in
addition to such  Grandfathered  Person's  shares of Common  Stock  Beneficially
Owned on the Record  Date,  equal in the  aggregate  to 1% or more of the Common
Stock then  outstanding,  or (ii) in any  event,  if such  Grandfathered  Person
becomes the Beneficial  Owner of 20% or more of the Company's  Common Stock; but
(iii) a  Grandfathered  Person  shall not become an Acquiring  Person  solely by
reason of a  reduction  of the  number of shares of  outstanding  Common  Stock.
Notwithstanding  the  foregoing,  if the  Board  of  Directors  of  the  Company
determines  in good  faith that a Person who would  otherwise  be an  "Acquiring
Person," as defined pursuant to the foregoing  provisions of this paragraph (a),
has become such inadvertently (including,  without limitation,  because (i) such
Person was unaware that it beneficially  owned a percentage of Common Stock that
would  otherwise  cause  such  Person to be an  "Acquiring  Person" or (ii) such
Person was aware of the  extent of its  Beneficial  Ownership  but had no actual
knowledge of the consequences of such Beneficial Ownership under this Agreement)
and without any intention of changing or influencing control of the Company, and
such Person divests as promptly as practicable a sufficient  number of shares of
Common  Stock so that such Person would no longer be an  "Acquiring  Person," as
defined  pursuant to the foregoing  provisions of this  paragraph (a), then such
Person shall not be deemed to be or to have become an "Acquiring Person" for any
purposes of this Agreement.

        (b)  "Affiliate"  and  "Associate"  shall have the  respective  meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations  under
the Securities  Exchange Act of 1934, as amended  ("Exchange Act"), as in effect
on the date of this Agreement.

        (c) A Person shall be deemed the "Beneficial Owner" of any securities

            (i)  which  such  Person  or  any of  such  Person's  Affiliates  or
Associates beneficially owns, directly or indirectly;

            (ii)  which  such  Person  or any of  such  Person's  Affiliates  or
Associates,  directly or indirectly,  has (A) the right to acquire (whether such
right is exercisable  immediately or only after the passage of time) pursuant to
any agreement,  arrangement or  understanding  (other than customary  agreements
with and between  underwriters  and selling group members with respect to a bona
fide public  offering  of  securities),  whether or not in writing,  or upon the
exercise of conversion rights,  exchange rights, rights (other than the Rights),
warrants or options, or otherwise; provided, however, that a Person shall not be
deemed the "Beneficial Owner" of, or to "beneficially  own," securities tendered
pursuant  to a tender  or  exchange  offer  made by such  Person  or any of such
Person's  Affiliates or Associates  until such tendered  securities are accepted
for  purchase  or  exchange;  or (B) the  right  to vote  or  dispose  of or has
"beneficial  ownership" of (as determined  pursuant to Rule 13d-3 of the General
Rules and  Regulations  under the Exchange  Act, or any  comparable or successor
rule),  including  pursuant  to  any  agreement,  arrangement  or  understanding
(whether  or not in  writing);  provided,  however,  that a Person  shall not be
deemed the "Beneficial  Owner" of, or to  "beneficially  own", any securities if
the  agreement,  arrangement or  understanding  to vote such security (1) arises
solely from a revocable  proxy or consent given in response to a public proxy or
consent  solicitation  made pursuant to, and in accordance  with, the applicable
rules and regulations of the Exchange Act and (2) is not also then reportable by
such  Person on  Schedule  13D  under the  Exchange  Act (or any  comparable  or
successor report); or

                                       2

<PAGE>


            (iii) which are beneficially owned,  directly or indirectly,  by any
other  Person  with  which such  Person or any of such  Person's  Affiliates  or
Associates has any agreement,  arrangement or  understanding  (whether or not in
writing)  for the purpose of  acquiring,  holding,  voting or  disposing  of any
securities of the Company;

provided,  however, that no Person who is an officer, director or employee of an
Exempt  Person  shall be  deemed,  solely by reason of such  Person's  status or
authority  as  such,  to be the  "Beneficial  Owner"  of,  to  have  "Beneficial
Ownership" of or to  "beneficially  own" any securities  that are  "beneficially
owned" (as defined in this Section 1(c)),  including,  without limitation,  in a
fiduciary capacity,  by an Exempt Person or by any other such officer,  director
or employee of an Exempt Person.

     For all purposes of this Agreement, any calculation of the number of shares
of Common Stock  outstanding at any particular  time,  including for purposes of
determining the particular percentage of such outstanding shares of Common Stock
of which any Person is the Beneficial  Owner,  shall be made in accordance  with
the last sentence of Rule  13d-3(d)(1)(i)  of the General Rules and  Regulations
under the Exchange Act as in effect on the date hereof.

        (d) "Business Day" shall mean any day other than a Saturday,  Sunday, or
a day on which  banking  institutions  in the  State of New York or the State of
California are authorized or obligated by law or executive order to close.

        (e) "Close of  Business"  on any given  date  shall mean 5:00 P.M.,  San
Francisco  time,  on such date;  provided,  however,  that if such date is not a
Business Day it shall mean 5:00 P.M., San Francisco time, on the next succeeding
Business Day.

        (f) "Common  Stock" when used with  reference to the Company  shall mean
the common stock of the Company.  "Common Stock" when used with reference to any
Person other than the Company  which shall be organized in corporate  form shall
mean the capital  stock or other  equity  security  with the  greatest per share
voting  power  of such  Person  or,  if such  Person  is a  Subsidiary  of or is
controlled  by  another  Person,  the  Person  which  ultimately  controls  such
first-mentioned  Person.  "Common  Stock" when used with reference to any Person
other than the Company which shall not be organized in corporate form shall mean
units of beneficial  interest which shall  represent the right to participate in
profits,  losses,  deductions  and  credits of such  Person  and which  shall be
entitled to exercise the greatest voting power per unit of such Person.

        (g)  "Common  Stock  Equivalents"  shall have the  meaning  set forth in
Section 11(a)(iii) hereof.

        (h) "Current  Market  Price" shall have the meaning set forth in Section
11(d) hereof.

        (i)  "Current  Value"  shall  have the  meaning  set  forth  in  Section
11(a)(iii) hereof.

        (j) "Distribution Date" shall have the meaning set forth in Section 3(a)
hereof.

                                       3

<PAGE>


        (k)  "Equivalent  Preferred  Stock"  shall have the meaning set forth in
Section 11(b) hereof.

        (l) "Exchange Act" shall have the meaning set forth in Section 1 hereof.

        (i)  "Exempt  Person"  shall mean the Company or any  Subsidiary  of the
Company, including,  without limitation, in its fiduciary capacity, any employee
benefit plan or employee  stock plan of the Company or of any  Subsidiary of the
Company,  or any Person,  organized,  appointed,  established  or holding Common
Stock for or pursuant to the terms of any such plan or any Person  funding other
employee benefits for employees of the Company or any Subsidiary of the Company.

        (m) "Final  Expiration Date" shall have the meaning set forth in Section
7(a) hereof.

        (n)  "Flip-In   Event"  shall  mean  any  event   described  in  Section
11(a)(ii)(A), 11(a)(ii)(B) or 11(a)(ii)(C) hereof.

        (o)  "Flip-In  Exercise  Payment"  shall have the  meaning  set forth in
Section 11(a)(ii) hereof.

        (p) "Flip-In  Trigger  Date" shall have the meaning set forth in Section
11(a)(iii) hereof.

        (q) "Flip-Over  Event" shall mean any event described in clause (x), (y)
or (z) of Section 13(a) hereof.

        (r)  "Flip-Over  Exercise  Payment"  shall have the meaning set forth in
Section 13(a) hereof.

        (s)  "Grandfathered  Person"  shall mean Thomas E. Moore,  provided that
such Person shall cease to be a Grandfathered Person at such time as such Person
ceases to Beneficially Own in excess of 15% of the Company's Common Stock.

        (t) "NASDAQ" shall have the meaning set forth in Section 9(b) hereof.

        (u) "Person" shall mean any individual, firm, corporation,  partnership,
trust or other entity.

        (v) "Preferred  Stock" shall mean the Series B Preferred  Stock,  no par
value of the Company  having the  rights,  powers and  preferences  set forth in
Exhibit A hereto,  and, to the extent that there is not a  sufficient  number of
shares of Series B Preferred Stock authorized to permit the full exercise of the
Rights,  any other  series of  Preferred  Stock,  no par value,  of the  Company
designated for such purpose containing terms substantially  similar to the terms
of the Series B Preferred Stock.

        (w) "Principal  Party" shall have the meaning set forth in Section 13(b)
hereof.

                                       4

<PAGE>


        (x)  "Purchase  Price"  shall have the meaning set forth in Section 4(a)
hereof.

        (y) "Record Date" shall have the meaning set forth in the WHEREAS clause
at the beginning of the Agreement.

        (z)  "Redemption  Date" shall have the meaning set forth in Section 7(a)
hereof.

        (aa)  "Redemption  Price"  shall have the  meaning  set forth in Section
23(a) hereof.

        (bb)  "Right  Certificate"  shall have the  meaning set forth in Section
3(a) hereof.

        (cc) "Securities Act" shall mean the Securities Act of 1933, as amended.

        (dd)  "Stock  Acquisition  Date"  shall  mean the  first  date of public
announcement by the Company or an Acquiring  Person that an Acquiring Person has
become such or such  earlier  date as a majority of the  directors  shall become
aware of the existence of an Acquiring Person.

        (ee)  "Substitution  Period" shall have the meaning set forth in Section
11(a)(iii) hereof.

        (ff) "Subsidiary" of a Person shall mean any corporation or other entity
of which  securities or other ownership  interests  having ordinary voting power
sufficient  to elect a  majority  of the  board of  directors  or other  persons
performing similar functions are beneficially owned, directly or indirectly,  by
such Person and any corporation or other entity that is otherwise  controlled by
such Person.

        (gg)  "Summary  of Rights"  shall have the  meaning set forth in Section
3(b) hereof.

        (hh)  "Trading  Day" shall have the meaning  set forth in Section  11(d)
hereof.

        (ii)  "Triggering  Event"  shall  mean any event  described  in  Section
11(a)(ii)(A), 11(a)(ii)(B) or 11(a)(ii)(C) or Section 13 hereof.

        (jj) "Voting Power" shall mean the voting power of all securities of the
Company  then  outstanding  and  generally  entitled to vote for the election of
directors of the Company.

     Any determination  required by the definitions  contained in this Section 1
shall be made by the  Board  of  Directors  of the  Company  in its  good  faith
judgment,  which  determination  shall be binding  on the  Rights  Agent and the
holders of the Rights.

     2.  Appointment  of Rights Agent.  The Company  hereby  appoints the Rights
Agent  to act as  agent  for the  Company  in  accordance  with  the  terms  and
conditions  hereof,  and the Rights Agent hereby accepts such  appointment.  The
Company  may from  time to time  appoint  such  Co-Rights  Agents as it may deem
necessary or desirable.  In the event the Company appoints one or

                                       5

<PAGE>


more  Co-Rights  Agents,  the  respective  duties of the  Rights  Agents and any
Co-Rights Agents shall be as the Company shall determine.

     3. Issuance of Right Certificates.

        (a) Until the  earlier of (i) the tenth day after the Stock  Acquisition
Date (or, if the tenth day after the Stock  Acquisition  Date occurs  before the
Record  Date,  the  Close of  Business  on the  Record  Date) or (ii) the  tenth
business day (or such later date as may be  determined by action of the Board of
Directors  prior to such time as any Person  becomes an Acquiring  Person) after
the date of the  commencement by any Person (other than an Exempt Person) of, or
of the first  public  announcement  of the intent of any Person  (other  than an
Exempt Person) to commence  (which  intention to commence  remains in effect for
five business days after such announcement), a tender or exchange offer upon the
successful  consummation of which such Person,  together with its Affiliates and
Associates,  would be the  Beneficial  Owner  of 15% or more of the  outstanding
Common Stock (irrespective of whether any shares are actually purchased pursuant
to any such  offer)  (including  any such  date  which is after the date of this
Agreement  and prior to the  issuance of the  Rights;  the earlier of such dates
being herein  referred to as the  "Distribution  Date"),  (x) the Rights will be
evidenced (subject to the provisions of Section 3(c) hereof) by the certificates
for the Common Stock  registered in the names of the holders of the Common Stock
and not by separate Right Certificates,  and (y) each Right will be transferable
only in  connection  with the  transfer  of a share  (subject to  adjustment  as
hereinafter  provided)  of  Common  Stock.  As soon  as  practicable  after  the
Distribution  Date, the Rights Agent will mail, by first-class,  postage prepaid
mail,  to each record  holder of the Common Stock as of the Close of Business on
the Distribution Date, as shown by the records of the Company, to the address of
such holder shown on such records, a Right certificate in substantially the form
of Exhibit B hereto ("Right Certificate") evidencing one Right for each share of
Common Stock so held. As of and after the Distribution  Date, the Rights will be
evidenced solely by such Right Certificates.

        (b) On the  Record  Date,  or as soon  as  practicable  thereafter,  the
Company  will send a copy of a Summary of Rights to  Purchase  Preferred  Stock,
substantially in the form attached hereto as Exhibit C ("Summary of Rights"), by
first-class,  postage  prepaid mail, to each record holder of Common Stock as of
the Close of Business on the Record Date, at the address of such holder shown on
the records of the Company.

        (c) Rights shall be issued in respect of all shares of Common Stock that
are issued (either as an original issuance or from the Company's treasury) after
the Record Date prior to the earlier of the Distribution  Date or the Expiration
Date. With respect to certificates representing such shares of Common Stock, the
Rights will be evidenced by such certificates for Common Stock registered in the
names of the holders  thereof  together  with the  Summary of Rights.  Until the
Distribution  Date (or, if earlier,  the  Expiration  Date),  the  surrender for
transfer of any  certificate  for Common  Stock  outstanding  on the Record Date
(with or without a copy of the Summary of Rights attached  thereto),  shall also
constitute the surrender for transfer of the Rights  associated  with the Common
Stock represented thereby.

                                       6

<PAGE>


        (d) Certificates issued for Common Stock (including, without limitation,
certificates  issued upon transfer or exchange of Common Stock) after the Record
Date but prior to the earlier of the  Distribution  Date or the Expiration  Date
shall have impressed on, printed on, written on or otherwise affixed to them the
following legend:

     This  certificate  also evidences and entitles the holder hereof to certain
Rights as set forth in the Rights Agreement  between  SciClone  Pharmaceuticals,
Inc. and ChaseMellon  Shareholder  Services,  LLC, as Rights Agent,  dated as of
July 25,  1997,  as the same  may be  amended  from  time to time  (the  "Rights
Agreement"),  the terms of which are incorporated herein by reference and a copy
of  which  is  on  file  at  the   principal   executive   office  of   SciClone
Pharmaceuticals,  Inc. Under certain  circumstances,  as set forth in the Rights
Agreement,  such Rights will be evidenced by separate  certificates  and will no
longer be evidenced by this  certificate.  SciClone  Pharmaceuticals,  Inc. will
mail to the holder of this  certificate a copy of the Rights  Agreement  without
charge  after  receipt  by it  of a  written  request  therefor.  Under  certain
circumstances   as  provided  in  the  Rights   Agreement,   Rights  issued  to,
beneficially  owned  by or  transferred  to  any  person  who is or  becomes  an
Acquiring  Person (as  defined  in the  Rights  Agreement)  or an  Associate  or
Affiliate (as defined in the Rights Agreement)  thereof and certain  transferees
thereof will be null and void and will no longer be transferable.

     With respect to such  certificates  containing  the foregoing  legend,  the
Rights associated with the Common Stock represented by such certificates  shall,
until the  Distribution  Date,  be evidenced  by such  certificates  alone,  and
registered  holders of Common Stock shall also be the registered  holders of the
associated  Rights, and the surrender for transfer of any such certificate shall
also  constitute  the surrender for transfer of the Rights  associated  with the
Common Stock  represented  thereby.  In the event that the Company  purchases or
acquires  any  shares of Common  Stock  after the  Record  Date but prior to the
earlier of the  Distribution  Date, the Redemption Date or the Expiration  Date,
any Rights  associated with such shares of Common Stock shall be deemed canceled
and  retired so that the Company  shall not be  entitled to exercise  any Rights
associated with the shares of Common Stock no longer outstanding.

     Notwithstanding  this  paragraph  (d),  the  omission of a legend shall not
affect the  enforceability  of any part of this  Agreement  or the rights of any
holder of the Rights.

     4. Form of Right Certificates.

        (a) The Right Certificates (and the forms of election to purchase shares
and of assignment to be printed on the reverse thereof), when, as and if issued,
shall be  substantially  in the form set forth in  Exhibit B hereto and may have
such marks of  identification  or  designation  and such  legends,  summaries or
endorsements  printed thereon as the Company may deem appropriate and as are not
inconsistent with the provisions of this Rights Agreement, or as may be required
to comply with any law or with any rule or regulation  made pursuant  thereto or
with any rule or regulation  of any stock  exchange on which the Rights may from
time to time be listed,  or to conform to usage.  Subject to the  provisions  of
Sections  11, 13 and 22 hereof,  the Right  Certificates  evidencing  the Rights
issued on the Record Date whenever such certificates are issued,  shall be dated
as of the Record Date and the Right Certificates evidencing Rights to holders of
record of Common  Stock  issued  after the Record  Date shall be dated as of the
Record

                                       7

<PAGE>


Date but shall  also be dated to  reflect  the date of  issuance  of such  Right
Certificate. On their face, Right Certificates shall entitle the holders thereof
to purchase, for each Right, one one-hundredth of a share of Preferred Stock, or
other  securities or property as provided  herein,  as the same may from time to
time be adjusted as provided  herein,  at the price per share of thirty  dollars
($30.00),  as the same may from time to time be adjusted as provided herein (the
"Purchase Price").

        (b)  Notwithstanding  any other provision of this Rights Agreement,  any
Right  Certificate  that  represents  Rights  that are or were at any time on or
after  the  earlier  of the  Stock  Acquisition  Date or the  Distribution  Date
beneficially  owned by an Acquiring Person or any Affiliate or Associate thereof
(or any  transferee of such Rights) shall have impressed on, printed on, written
on or otherwise  affixed to it (if the Company or the Rights Agent has knowledge
that such Person is an Acquiring Person or an Associate or Affiliate  thereof or
transferee of such Persons or a nominee of any of the  foregoing)  the following
legend:

     The beneficial owner of the Rights represented by this Right Certificate is
     an Acquiring  Person or an Affiliate or Associate (as defined in the Rights
     Agreement)  of an  Acquiring  Person or a  subsequent  holder of such Right
     Certificates  beneficially owned by such Persons.  Accordingly,  this Right
     Certificate and the Rights represented hereby are null and void and will no
     longer be transferable as provided in the Rights Agreement.

The  provisions  of Section  11(a)(ii)  and Section 24 of this Rights  Agreement
shall be operative  whether or not the foregoing legend is contained on any such
Right Certificates.

     5. Countersignature and Registration.

        (a) The Right Certificates shall be executed on behalf of the Company by
its  Chief  Executive  Officer,  its  President  or any Vice  President,  either
manually or by facsimile signature,  and have affixed thereto the Company's seal
or a facsimile  thereof which shall be attested by the Secretary or an Assistant
Secretary of the Company,  either manually or by facsimile signature.  The Right
Certificates  shall be  countersigned,  either manually or by facsimile,  by the
Rights Agent and shall not be valid for any purpose unless so countersigned.  In
case  any  officer  of the  Company  who  shall  have  signed  any of the  Right
Certificates   shall   cease  to  be  such   officer  of  the   Company   before
countersignature  by the Rights  Agent and issuance and delivery by the Company,
such Right Certificates, nevertheless, may be countersigned by the Rights Agent,
issued  and  delivered  with the same  force and effect as though the person who
signed such Right Certificates had not ceased to be such officer of the Company;
and any Right  Certificate  may be signed on behalf of the Company by any person
who, at the actual date of the execution of such Right  Certificate,  shall be a
proper  officer of the Company to sign such Right  Certificate,  although at the
date of the  execution of this Rights  Agreement any such person was not such an
officer.

        (b) Following the Distribution Date, the Rights Agent will keep or cause
to be kept,  at one of its offices  designated  for such  purposes,  records for
registration  and  transfer of the Right  Certificates  issued  hereunder.  Such
records  shall show the names and  addresses  of the  respective  holders of the
Right  Certificates,  the number of Rights  evidenced on its face by each of the
Right  Certificates,  the  date  of  each  of the  Right  Certificates  and  the
certificate numbers for each of the Right Certificates.

                                       8

<PAGE>


     6.  Transfer,  Split Up,  Combination  and Exchange of Right  Certificates;
Mutilated, Destroyed, Lost or Stolen Right Certificates.

        (a) Subject to the provisions of Sections 7(e), 11(a)(ii) and 14 hereof,
at any time after the Close of Business on the Distribution Date and at or prior
to the Close of  Business  on the  Expiration  Date,  any Right  Certificate  or
Certificates (other than Right Certificates representing Rights that have become
void pursuant to Section  11(a)(ii) hereof or that have been exchanged  pursuant
to Section 24  hereof)  may be (i)  transferred  or (ii) split up,  combined  or
exchanged for another Right  Certificate  or Right  Certificates,  entitling the
registered  holder to  purchase a like  number of shares of  Preferred  Stock or
other securities as the Right Certificate or Right Certificates surrendered then
entitled such holder to purchase. Any registered holder desiring to transfer any
Right  Certificate  shall  surrender the Right  Certificate at the office of the
Rights Agent  designated  for such  purposes  with the form of assignment on the
reverse  side thereof duly  endorsed (or enclose with such Right  Certificate  a
written  instrument  of  transfer  in form  satisfactory  to the Company and the
Rights Agent),  duly executed by the  registered  holder thereof or his attorney
duly authorized in writing,  and with such signature guaranteed by a member of a
securities  approved medallion program.  Any registered holder desiring to split
up, combine or exchange any Right Certificate shall make such request in writing
delivered to the Rights  Agent,  and shall  surrender the Right  Certificate  or
Right Certificates to be split up, combined or exchanged at the principal office
of the Rights Agent. Thereupon the Rights Agent shall, subject to Sections 4(b),
7(e),  11 and 14 hereof,  countersign  (by manual or  facsimile  signature)  and
deliver  to  the  person   entitled   thereto  a  Right   Certificate  or  Right
Certificates,  as the case may be, as so  requested.  The  Company  may  require
payment of a sum sufficient to cover any tax or governmental  charge that may be
imposed in connection  with any transfer,  split up,  combination or exchange of
Right Certificates.

        (b) Subject to the provisions of Section 11(a)(ii) hereof,  upon receipt
by the Company and the Rights Agent of evidence reasonably  satisfactory to them
of the loss, theft,  destruction or mutilation of a Right  Certificate,  and, in
case of  loss,  theft  or  destruction,  of  indemnity  or  security  reasonably
satisfactory  to them,  and, if requested by the Company,  reimbursement  to the
Company of all reasonable expenses incidental thereto, and upon surrender to the
Rights Agent and cancellation of the Right Certificate if mutilated, the Company
will  execute  and deliver a new Right  Certificate  of like tenor to the Rights
Agent for delivery to the registered  owner in lieu of the Right  Certificate so
lost, stolen, destroyed or mutilated.

     7. Exercise of Rights; Purchase Price; Expiration Date of Rights.

        (a)  Subject to  Section  11(a)(ii)  hereof,  the  Rights  shall  become
exercisable,  and may be  exercised  to  purchase  Preferred  Stock,  except  as
otherwise  provided  herein,  in  whole  or  in  part  at  any  time  after  the
Distribution  Date upon  surrender  of the Right  Certificate,  with the form of
election to  purchase  on the reverse  side  thereof  duly  executed  (with such
signature duly  guaranteed),  to the Rights Agent at 50 California  Street,  San
Francisco, CA 94111, Attn: Relationship Management, together with payment of the
Purchase  Price with respect to each Right  exercised,  subject to adjustment as
hereinafter provided, at or prior to the Close of Business on the earlier of (i)
July 24, 2007 (the "Final Expiration  Date"),  (ii) the time at which the Rights
are redeemed as provided in Section 23 hereof  (such date being herein  referred
to as the

                                       9

<PAGE>


"Redemption  Date") or (iii) the time at which all such Rights are  exchanged as
provided in Section 24 hereof (the  earliest of (i), (ii) and (iii) being herein
referred to as the "Expiration Date").

        (b) The Purchase  Price and the number of shares of  Preferred  Stock or
other  securities or consideration to be acquired upon exercise of a Right shall
be subject to  adjustment  from time to time as  provided  in Sections 11 and 13
hereof. The Purchase Price shall be payable in lawful money of the United States
of America, in accordance with Section 7(c) hereof.

        (c) Except as provided in Section  11(a)(ii)  hereof,  upon receipt of a
Right  Certificate  with  the  form  of  election  to  purchase  duly  executed,
accompanied  by payment  of the  Purchase  Price (as such  amount may be reduced
pursuant to Section  11(a)(iii)  hereof) or so much thereof as is necessary  for
the shares to be purchased and an amount equal to any  applicable  transfer tax,
by cash,  certified  check or  official  bank check  payable to the order of the
Company or the Rights Agent,  the Rights Agent shall,  subject to Section 20(k),
thereupon  promptly (i)  requisition  from any transfer  agent of the  Preferred
Stock (or make available if the Rights Agent is the transfer agent) certificates
for the number of shares of Preferred  Stock so elected to be purchased  and the
Company will comply and hereby  authorizes  and directs such  transfer  agent to
comply with all such requests,  (ii)  requisition from the Company the amount of
cash to be paid in lieu of  issuance of  fractional  shares in  accordance  with
Section 14(b) hereof,  and (iii) promptly after receipt of such Preferred  Stock
certificates  cause  the  same to be  delivered  to or  upon  the  order  of the
registered holder of such Right Certificate, registered in such name or names as
may be designated by such holder, and, when appropriate,  after receipt promptly
deliver  such cash to or upon the order of the  registered  holder of such Right
Certificate.  In the event of a purchase  of  securities,  other than  Preferred
Stock,  pursuant to Section  11(a) or Section 13 hereof,  the Rights Agent shall
promptly take the appropriate actions corresponding to the foregoing clauses (i)
through  (iii).  In the event  that the  Company  is  obligated  to issue  other
securities of the Company, pay cash and/or distribute other property pursuant to
Section 11(a) hereof,  the Company will make all arrangements  necessary so that
such other securities, cash and/or other property are available for distribution
by the Rights Agent, if and when appropriate.

        (d) Except as otherwise  provided herein,  in case the registered holder
of any Right  Certificate  shall  exercise  less than all the  Rights  evidenced
thereby,  a new Right  Certificate  evidencing  Rights  equivalent to the Rights
remaining  unexercised  shall be issued by the  Rights  Agent to the  registered
holder of such Right Certificate or to his duly authorized  assigns,  subject to
the  provisions  of Section  14 hereof.  

        (e) Notwithstanding anything in this Agreement to the contrary,  neither
the Rights Agent nor the Company shall be obligated to undertake any action with
respect to a registered holder upon the occurrence of any purported  exercise as
set  forth in this  Section  7 unless  such  registered  holder  shall  have (i)
completed  and signed  the  certificate  contained  in the form of  election  to
purchase set forth on the reverse side of the Right Certificate  surrendered for
such exercise and (ii) provided such additional  evidence of the identity of the
Beneficial  Owner (or  former  Beneficial  Owner) or  Affiliates  or  Associates
thereof as the Company shall reasonably request.

                                       10

<PAGE>


     8.   Cancellation  and  Destruction  of  Right   Certificates.   All  Right
Certificates  surrendered  for the  purpose  of  exercise,  transfer,  split up,
combination  or exchange  shall,  if surrendered to the Company or to any of its
agents,  be delivered to the Rights Agent for  cancellation or in canceled form,
or, if  surrendered  to the Rights Agent,  shall be canceled by it, and no Right
Certificates  shall be issued in lieu thereof  except as expressly  permitted by
any of the provisions of this Rights Agreement. The Company shall deliver to the
Rights  Agent for  cancellation  and  retirement,  and the Rights Agent shall so
cancel and retire,  any Right  Certificate  purchased or acquired by the Company
otherwise  than upon the exercise  thereof.  The Rights Agent shall  deliver all
canceled Right Certificates to the Company,  or shall, at the written request of
the Company,  destroy such canceled Right  Certificates,  and in such case shall
deliver a certificate of destruction thereof to the Company.

     9. Reservation and Availability of Shares of Preferred Stock.

        (a) The Company  covenants and agrees that at all times it will cause to
be reserved and kept  available,  out of and to the extent of its authorized and
unissued  shares of  Preferred  Stock not  reserved  for another  purpose  (and,
following the occurrence of a Triggering Event, other securities) or held in its
treasury, the number of shares of Preferred Stock (and, following the occurrence
of a Triggering  Event,  other  securities) that, as provided in this Agreement,
including Section 11(a)(iii)  hereof,  will be sufficient to permit the exercise
in full of all outstanding Rights, provided, however, that the Company shall not
be required to reserve and keep  available  shares of  Preferred  Stock or other
securities  sufficient to permit the exercise in full of all outstanding  Rights
pursuant to the adjustments set forth in Section  11(a)(ii),  Section 11(a)(iii)
or Section 13 hereof  unless,  and only to the extent  that,  the Rights  become
exercisable pursuant to such adjustments.

        (b) The Company shall (i) use its best efforts to cause,  from and after
such  time as the  Rights  become  exercisable,  the  Rights  and all  shares of
Preferred  Stock (and  following  the  occurrence of a Triggering  Event,  other
securities) issued or reserved for issuance upon exercise thereof to be reported
by the National  Association of Securities  Dealers,  Inc. Automated  Quotations
System  ("NASDAQ") or such other system then in use, and if the Preferred  Stock
shall become  listed on any national  securities  exchange,  to cause,  from and
after such time as the Rights become  exercisable,  the Rights and all shares of
Preferred  Stock (and,  following the  occurrence of a Triggering  Event,  other
securities)  issued or reserved for issuance upon exercise  thereof to be listed
on such exchange upon official notice of issuance upon such exercise and (ii) if
then  necessary,  to permit the offer and  issuance of such shares of  Preferred
Stock (and,  following the occurrence of a Triggering Event,  other securities),
register  and  qualify  such  share  of  Preferred  Stock  (and,  following  the
occurrence of a Triggering Event, other securities) under the Securities Act and
any  applicable  state  securities or "blue sky" laws (to the extent  exemptions
therefrom   are  not   available),   cause  such   registration   statement  and
qualifications  to become  effective  as soon as possible  after such filing and
keep such registration and qualifications effective until the Expiration Date of
the Rights.  The Company may  temporarily  suspend,  for a period of time not to
exceed ninety (90) days,  the  exercisability  of the Rights in order to prepare
and file a  registration  statement  under the  Securities  Act and permit it to
become  effective.  Upon any such  suspension,  the Company shall issue a public
announcement  stating that the exercisability of the Rights has been temporarily
suspended, as well as a public announcement at such time as

                                       11

<PAGE>


the  suspension  is no longer in effect.  Notwithstanding  any provision of this
Agreement  to  the  contrary,  the  Rights  shall  not  be  exercisable  in  any
jurisdiction unless the requisite  qualification in such jurisdiction shall have
been obtained and until a  registration  statement  under the Securities Act (if
required) shall have been declared effective.

        (c) The Company  covenants  and agrees that it will take all such action
as may be necessary to ensure that all shares of Preferred  Stock (and following
the occurrence of a Triggering Event, other securities)  delivered upon exercise
of Rights  shall,  at the time of delivery of the  certificates  for such shares
(subject  to payment of the  Purchase  Price in  respect  thereof),  be duly and
validly  authorized  and  issued  and  fully  paid and  nonassessable  shares in
accordance with applicable law.

        (d) The Company  further  covenants and agrees that it will pay when due
and payable any and all federal and state transfer taxes which may be payable in
respect of the issuance or delivery of the Right  Certificates  or of any shares
of Preferred Stock (or other  securities,  as the case may be) upon the exercise
of Rights.  The Company shall not, however,  be required to pay any transfer tax
which  may  be  payable  in  respect  of  any  transfer  or  delivery  of  Right
Certificates to a Person other than, or the issuance or delivery of certificates
for Preferred Stock (or other  securities,  as the case may be) upon exercise of
Rights  in a name  other  than  that of,  the  registered  holder  of the  Right
Certificate,  and the Company  shall not be required to issue or deliver a Right
Certificate or certificate for Preferred Stock (or other securities, as the case
may be) to a person other than such  registered  holder until any such tax shall
have  been  paid  (any  such tax  being  payable  by the  holder  of such  Right
Certificate  at the time of surrender) or until it has been  established  to the
Company's satisfaction that no such tax is due.

     10.  Preferred Stock Record Date. Each Person in whose name any certificate
for  shares of  Preferred  Stock (or  other  securities,  as the case may be) is
issued  upon the  exercise  of Rights  shall for all  purposes be deemed to have
become  the  holder  of  record  of the  shares  of  Preferred  Stock  (or other
securities,  as the case may be)  represented  thereby on, and such  certificate
shall be dated, the date upon which the Right Certificate evidencing such Rights
was duly  surrendered  and  payment of the  Purchase  Price (and any  applicable
transfer taxes) was made. Prior to the exercise of the Rights evidenced thereby,
the holder of a Right Certificate,  as such, shall not be entitled to any rights
of a stockholder  of the Company with respect to the shares for which the Rights
shall be  exercisable,  including,  without  limitation,  the right to vote,  to
receive dividends or other  distributions or to exercise any preemptive  rights,
and shall not be  entitled  to  receive  any  notice of any  proceedings  of the
Company, except as provided herein.

     11. Adjustments to Number and Kind of Shares,  Number of Rights or Purchase
Price.  The number and kind of shares  subject to purchase  upon the exercise of
each Right, the number of Rights  outstanding and the Purchase Price are subject
to adjustment from time to time as provided in this Section 11.

        (a) (i) In the event  the  Company  shall at any time  after the date of
this Rights Agreement (A) declare or pay any dividend on Preferred Stock payable
in shares of Preferred Stock,  (B) subdivide or split the outstanding  shares of
Preferred Stock into a greater number of shares,  (C) combine or consolidate the
outstanding  shares of Preferred Stock into a 

                                       12

<PAGE>


smaller number of shares or effect a reverse split of the outstanding  shares of
Preferred   Stock,   or  (D)  issue  any  shares  of  its  capital  stock  in  a
reclassification of the Preferred Stock (including any such  reclassification in
connection with a consolidation or merger in which the Company is the continuing
or surviving  corporation),  except as otherwise provided in this Section 11(a),
the Purchase Price in effect at the time of the record date for such dividend or
of the effective date of such subdivision, combination or reclassification,  and
the number and kind of shares of Preferred  Stock or capital stock,  as the case
may be,  issuable on such date,  shall be  proportionately  adjusted so that the
holder of any Right exercised after such time shall be entitled to receive, upon
payment of the Purchase Price then in effect,  the aggregate  number and kind of
shares of  capital  stock or other  securities,  which,  if such  Right had been
exercised  immediately  prior to such date,  the holder thereof would have owned
upon such  exercise  and been  entitled  to receive by virtue of such  dividend,
subdivision,  combination  or  reclassification.  If an event occurs which would
require an  adjustment  under both this Section  11(a)(i) and Section  11(a)(ii)
hereof,  the  adjustment  provided  for in this  Section  11(a)(i)  shall  be in
addition  to, and shall be made prior to, any  adjustment  required  pursuant to
Section 11(a)(ii).

            (ii) Subject to Section 24, in the event

                  (A) any Acquiring  Person or any Associate or Affiliate of any
Acquiring  Person,  at any time after the date of this  Agreement,  directly  or
indirectly, (1) shall consolidate with or merge with and into the Company or any
of  its  Subsidiaries  or  otherwise  combine  with  the  Company  or any of its
Subsidiaries  and the  Company or such  Subsidiary  shall be the  continuing  or
surviving  corporation  of such  consolidation,  merger or  combination  and the
Common Stock of the Company shall remain outstanding and no shares thereof shall
be changed into or exchanged for stock or other  securities of the Company or of
any other  Person or cash or any other  property,  or (2) shall,  in one or more
transactions,  other than in  connection  with the exercise of a Right or Rights
and other than in  connection  with the  exercise or  conversion  of  securities
exercisable  for  or  convertible  into  securities  of  the  Company  or of any
Subsidiary of the Company, transfer any assets or property to the Company or any
of its  Subsidiaries  in  exchange  (in whole or in part) for any  shares of any
class  of  capital  stock  of the  Company  or any  of its  Subsidiaries  or any
securities  exercisable  for or convertible  into shares of any class of capital
stock of the Company or any of its  Subsidiaries,  or otherwise  obtain from the
Company  or  any  of  its  Subsidiaries,  with  or  without  consideration,  any
additional  shares of any class of  capital  stock of the  Company or any of its
Subsidiaries or any securities exercisable for or convertible into shares of any
class of capital stock of the Company or any of its Subsidiaries  (other than as
part of a pro rata offer or  distribution  by the Company or such  Subsidiary to
all holders of such  shares),  or (3) shall  sell,  purchase,  lease,  exchange,
mortgage,  pledge,  transfer  or  otherwise  acquire  (other  than as a pro rata
dividend) or dispose,  to, from or with, as the case may be, in one  transaction
or a series of  transactions,  the  Company or any of its  Subsidiaries,  assets
(including  securities) on terms and conditions less favorable to the Company or
such Subsidiary  than the Company or such Subsidiary  would be able to obtain in
arm's-length  negotiation with an unaffiliated third party, or (4) shall receive
any compensation  from the Company or any of its Subsidiaries for services other
than compensation for employment as a regular or part-time employee, or fees for
serving  as a  director,  at rates in  accordance  with  the  Company's  (or its
Subsidiary's)  past  practices,  or (5) shall  receive the benefit,  directly or
indirectly (except  proportionately as a stockholder),  of any loans,

                                       13

<PAGE>


advances,  guarantees,  pledges or other financial assistance or any tax credits
or tax  advantage  provided  by the Company or any of its  Subsidiaries,  or (6)
shall engage in any  transaction  with the Company (or any of its  Subsidiaries)
involving  the sale,  license,  transfer or grant of any right in, or disclosure
of, any patents, copyrights,  trade secrets,  trademarks,  know-how or any other
intellectual  or  industrial  property  rights  recognized  under any  country's
intellectual  property laws which the Company  (including its Subsidiaries) owns
or has the right to use on terms and conditions not approved by the Board; or

                  (B) any Person,  alone or  together  with its  Affiliates  and
Associates, shall become an Acquiring Person; or

                  (C) during such time as there is an  Acquiring  Person,  there
shall be any reclassification of securities (including any reverse stock split),
or any  recapitalization  of the Company,  or any merger or consolidation of the
Company  with any of its  Subsidiaries  or any  other  transaction  or series of
transactions  involving the Company or any of its  Subsidiaries  (whether or not
with or into or  otherwise  involving an  Acquiring  Person or any  Affiliate or
Associate  of  such  Acquiring  Person)  which  has  the  effect,   directly  or
indirectly,  of  increasing  by more  than  1% the  proportionate  share  of the
outstanding  shares of any class of equity  securities  of the Company or any of
its  Subsidiaries,  or securities  exercisable  for or  convertible  into equity
securities  of the  Company or any of its  Subsidiaries,  which is  directly  or
indirectly  beneficially  owned by any  Acquiring  Person  or any  Affiliate  or
Associate  of any  Acquiring  Person (any of (A),  (B) or (C) being  referred to
herein as a "Flip-In Event"),

then upon the first  occurrence  of such Flip-In  Event (A) the  Purchase  Price
shall be adjusted to be the Purchase  Price in effect  immediately  prior to the
Flip-In  Event  multiplied  by the  number  of one  one-hundredth  of a share of
Preferred  Stock  for which a Right was  exercisable  immediately  prior to such
Flip-In  Event,  whether  or not such Right was then  exercisable,  and (B) each
holder of a Right,  except as otherwise  provided in this Section  11(a)(ii) and
Section  11(a)(iii)  hereof,  shall  thereafter have the right to receive,  upon
exercise  thereof at a price equal to the Purchase  Price (as so  adjusted),  in
accordance  with the terms of this  Agreement and in lieu of shares of Preferred
Stock,  such number of shares of Common Stock as shall equal the result obtained
by dividing  the Purchase  Price (as so  adjusted) by 50% of the Current  Market
Price per share of the  Common  Stock  (determined  pursuant  to  Section  11(d)
hereof) on the date of such Flip-In Event; provided,  however, that the Purchase
Price (as so adjusted)  and the number of shares of Common  Stock so  receivable
upon the exercise of a Right shall,  following the Flip-In Event,  be subject to
further  adjustment  as  appropriate  in  accordance  with Section 11(f) hereof.
Notwithstanding  anything in this Agreement to the contrary,  however,  from and
after the  Flip-In  Event,  any Rights  that are  beneficially  owned by (x) any
Acquiring Person (or any Affiliate or Associate of any Acquiring Person),  (y) a
transferee of any  Acquiring  Person (or any such  Affiliate or  Associate)  who
becomes  a  transferee  after  the  Flip-In  Event  or (z) a  transferee  of any
Acquiring  Person (or any such  Affiliate or Associate)  who became a transferee
prior to or  concurrently  with the  Flip-In  Event  pursuant  to  either  (I) a
transfer from the Acquiring Person to holders of its equity securities or to any
Person with whom it has any continuing  agreement,  arrangement or understanding
regarding the transferred Rights or (II) a transfer which the Board of Directors
has  determined is part of a plan,  arrangement or  understanding  which has the
purpose or effect of avoiding the provisions of this  paragraph,  and subsequent
transferees  of such Persons,  shall be void without

                                       14

<PAGE>


any further action and any holder of such Rights shall thereafter have no rights
whatsoever  with respect to such Rights under any  provision of this  Agreement.
The Company shall use all  reasonable  efforts to ensure that the  provisions of
this Section  11(a)(ii)  are complied  with,  but shall have no liability to any
holder of Right  Certificates or other Person as a result of its failure to make
any  determinations  with  respect  to an  Acquiring  Person or its  Affiliates,
Associates or transferees hereunder.  From and after the Flip-In Event, no Right
Certificate  shall be issued  pursuant  to  Section 3 or  Section 6 hereof  that
represents  Rights that are or have become void  pursuant to the  provisions  of
this  paragraph,  and any Right  Certificate  delivered to the Rights Agent that
represents  Rights that are or have become void  pursuant to the  provisions  of
this paragraph shall be canceled.

            (iii) The Company may at its option substitute for a share of Common
Stock  issuable  upon the exercise of Rights in  accordance  with the  foregoing
subparagraph  (ii) such number or fractions of shares of Preferred  Stock having
an aggregate  current  market value equal to the Current Market Price of a share
of Common  Stock.  In the event that  there  shall not be  sufficient  shares of
Common Stock issued but not outstanding or authorized but unissued to permit the
exercise in full of the Rights in  accordance  with the  foregoing  subparagraph
(ii), the Board of Directors  shall,  to the extent  permitted by applicable law
and any material  agreements  then in effect to which the Company is a party (A)
determine the excess (such  excess,  being the "Spread") of (1) the value of the
shares of Common Stock issuable upon the exercise of a Right in accordance  with
the  foregoing  subparagraph  (ii) (the  "Current  Value") over (2) the Purchase
Price (as adjusted in accordance with the foregoing  subparagraph (ii)), and (B)
with respect to each Right (other than Rights which have become void pursuant to
the foregoing  subparagraph (ii)), make adequate provision to substitute for the
shares of Common Stock issuable in accordance with the foregoing  paragraph (ii)
upon  exercise of the Right and payment of the  Purchase  Price (as  adjusted in
accordance  therewith),  (1) cash, (2) a reduction in such Purchase  Price,  (3)
shares of Preferred Stock or other equity securities of the Company  (including,
without  limitation,  shares or fractions of shares of preferred stock which, by
virtue  of  having  dividend,   voting  and  liquidation  rights   substantially
comparable to those of the shares of Common  Stock,  are deemed in good faith by
the Board of  Directors  to have  substantially  the same value as the shares of
Common Stock (such  shares of Preferred  Stock and shares or fractions of shares
of preferred  stock are hereinafter  referred to as "Common Stock  Equivalents",
(4) debt securities of the Company,  (5) other assets, or (6) any combination of
the  foregoing,  having a value which,  when added to the value of the shares of
Common  Stock  actually  issued  upon  exercise  of such  Right,  shall  have an
aggregate  value equal to the Current Value (less the amount of any reduction in
such Purchase  Price),  where such  aggregate  value has been  determined by the
Board of Directors upon the advice of a nationally recognized investment banking
firm selected in good faith by the Board of Directors;  provided,  however, that
if the Company  shall not make adequate  provision to deliver value  pursuant to
clause (B) above  within  thirty  (30) days  following  the  Flip-In  Event (the
"Flip-in Trigger Date"),  then the Company shall be obligated to deliver, to the
extent permitted by applicable law and any material agreements then in effect to
which the Company is a party,  upon the  surrender  for  exercise of a Right and
without requiring payment of such Purchase Price, shares of Common Stock (to the
extent available), and then, if necessary, such number or fractions of shares of
Preferred Stock (to the extent  available) and then, if necessary,  cash,  which
shares and/or cash have an aggregate value equal to the

                                       15

<PAGE>


Spread.  If the Board of Directors of the Company shall  determine in good faith
that it is likely  that  sufficient  additional  shares of Common  Stock  and/or
Common Stock  Equivalents could be authorized for issuance upon exercise in full
of the Rights, the thirty (30) day period set forth above may be extended to the
extent  necessary,  but not more than ninety (90) days after the Flip-In Trigger
Date,  in  order  that  the  Company  may  seek  stockholder  approval  for  the
authorization of such additional shares or Common Stock Equivalents (such thirty
(30) day  period,  as it may be  extended,  is herein  called the  "Substitution
Period").  To the extent  that the Company  determines  that some action need be
taken pursuant to the second and/or third  sentence of this Section  11(a)(iii),
the Company (x) shall provide, subject to the last sentence of Section 11(a)(ii)
hereof,  that such action shall apply uniformly to all outstanding  Rights,  and
(y) may suspend the  exercisability  of the Rights until the  expiration  of the
Substitution  Period in order to seek any  authorization  of  additional  shares
and/or to decide the appropriate form of distribution to be made pursuant to the
first sentence of Section 11(a)(iii) and to determine the value thereof.  In the
event of any such  suspension,  the Company  shall  issue a public  announcement
stating that the exercisability of the Rights has been temporarily suspended, as
well as a public  announcement  at such time as the  suspension  is no longer in
effect. For purposes of this Section  11(a)(iii),  the value of the Common Stock
shall be the Current  Market  Price per share of the Common Stock on the Flip-In
Trigger Date and the per share or per unit value of any Common Stock  Equivalent
shall be deemed to equal the Current  Market Price per share of the Common Stock
on such  date.  The  Board of  Directors  may,  but shall  not be  required  to,
establish  procedures  to allocate  the right to receive  Common  Stock upon the
exercise  of the  Rights  among  holders  of  Rights  pursuant  to this  Section
11(a)(iii).

        (b) In case the  Company  shall fix a record  date for the  issuance  of
rights (other than the Rights),  options or warrants to all holders of Preferred
Stock  entitling them to subscribe for or purchase (for a period expiring within
forty-five  calendar days after such record date) Preferred Stock, shares having
the same rights,  privileges and preferences as the Preferred Stock ("equivalent
preferred  stock") or securities  convertible into Preferred Stock or equivalent
preferred stock at a price per share of Preferred Stock or equivalent  preferred
stock (or having a conversion  price per share, if a security  convertible  into
Preferred  Stock or  equivalent  preferred  stock) less than the Current  Market
Price per share of Preferred Stock on such record date, the Purchase Price to be
in effect after such record date shall be determined by multiplying the Purchase
Price  in  effect  immediately  prior to such  record  date by a  fraction,  the
numerator of which shall be the number of shares of Preferred Stock  outstanding
on such  record  date,  plus the number of shares of  Preferred  Stock which the
aggregate offering price of the total number of shares of Preferred Stock and/or
equivalent preferred stock (and/or the aggregate initial conversion price of the
convertible  securities so to be offered)  would purchase at such Current Market
Price,  and the  denominator of which shall be the number of shares of Preferred
Stock  outstanding on such record date, plus the number of additional  shares of
Preferred Stock and/or equivalent preferred stock to be offered for subscription
or  purchase  (or into which the  convertible  securities  so to be offered  are
initially convertible).  In case such subscription price may be paid by delivery
of  consideration  part or all of which may be in a form other  than  cash,  the
value of such non-cash consideration shall be as determined in good faith by the
Board of Directors of the Company,  whose  determination shall be described in a
statement  filed with the Rights  Agent.  Shares of Preferred  Stock owned by or
held for the  account of the  Company  shall

                                       16

<PAGE>


not be  deemed  outstanding  for  the  purpose  of any  such  computation.  Such
adjustment shall be made successively  whenever such a record date is fixed, and
in the event that such rights or warrants are not so issued,  the Purchase Price
shall be adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

        (c) In case the Company  shall fix a record date for a  distribution  to
all  holders  of  Preferred  Stock  (including  any  such  distribution  made in
connection with a consolidation or merger in which the Company is the continuing
corporation) of evidences of indebtedness,  cash,  assets (other than a dividend
payable in Preferred  Stock,  but including any dividend  payable in stock other
than  Preferred  Stock) or  subscription  rights or  warrants  (excluding  those
referred to in Section 11(b)  hereof),  the Purchase Price to be in effect after
such record date shall be determined by multiplying the Purchase Price in effect
immediately  prior to such  record date by a fraction,  the  numerator  of which
shall be the Current  Market Price per share of  Preferred  Stock on such record
date,  less the fair market value (as  determined  in good faith by the Board of
Directors of the Company,  whose determination shall be described in a statement
filed with the Rights Agent) of the portion of the cash,  assets or evidences of
indebtedness  to be  distributed  or of such  subscription  rights  or  warrants
applicable to a share of Preferred  Stock and the  denominator of which shall be
such Current Market Price per share of Preferred Stock.  Such adjustments  shall
be made successively whenever such a record date is fixed, and in the event that
such distribution is not so made, the Purchase Price shall be adjusted to be the
Purchase  Price which would have been in effect if such record date had not been
fixed.

        (d)  (i)  For the  purpose  of any  computation  hereunder,  other  than
computations  made pursuant to Section  11(a)(iii)  hereof,  the "Current Market
Price" per share of Common  Stock on any date shall be deemed to be the  average
of the daily  closing  prices  per  share of the  Common  Stock  for the  thirty
consecutive Trading Days (as such term is hereinafter defined) immediately prior
to such  date,  and  for  purpose  of  computations  made  pursuant  to  Section
11(a)(iii)  hereof,  the "Current Market Price" per share of the Common Stock on
any date shall be deemed to be the average of the daily closing prices per share
of the Common Stock for the ten consecutive  Trading Days immediately  following
such date;  provided,  however,  that in the event that the Current Market Price
per  share of the  Common  Stock is  determined  during a period  following  the
announcement  by  the  issuer  of  the  Common  Stock  of (i)  any  dividend  or
distribution  on the Common Stock (other than a regular  quarterly cash dividend
and   other   than  the   Rights),   (ii)  any   subdivision,   combination   or
reclassification  of the  Common  Stock,  and  prior  to the  expiration  of the
requisite  thirty  Trading Day or ten Trading  Day period,  as set forth  above,
after the ex-dividend date for such dividend or distribution, or the record date
for such subdivision,  combination or reclassification occurs, then, and in each
such case,  the Current  Market  Price  shall be properly  adjusted to take into
account  ex-dividend  trading.  The closing price for each day shall be the last
sale price,  regular  way, or, in case no such sale takes place on such day, the
average of the  closing  bid and asked  prices,  regular  way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities  listed or admitted to trading on the New York Stock  Exchange or,
if the shares of Common  Stock are not listed or  admitted to trading on the New
York Stock  Exchange,  as reported  in the  principal  consolidated  transaction
reporting  system with respect to securities  listed on the  principal  national
securities  exchange on which the shares of Common  Stock are listed or admitted
to trading  or, if the  shares of Common  Stock are not  listed or  admitted  to
trading on any national securities  exchange,  the last quoted

                                       17

<PAGE>


sale  price  or, if not so  quoted,  the  average  of the high bid and low asked
prices in the  over-the-counter  market,  as  reported  by NASDAQ or such  other
system then in use,  or, if on any such date the shares of Common  Stock are not
quoted by any such organization, the average of the closing bid and asked prices
as furnished by a professional  market maker making a market in the Common Stock
selected by the Board of Directors of the Company. If on any such date no market
maker is making a market in the Common  Stock,  the fair value of such shares on
such date as  determined  in good faith by the Board of Directors of the Company
shall be used and shall be binding on the Rights  Agent.  The term "Trading Day"
shall mean a day on which the principal  national  securities  exchange on which
the  shares of Common  Stock are listed or  admitted  to trading is open for the
transaction  of  business  or, if the  shares of Common  Stock are not listed or
admitted to trading on any national securities  exchange, a Business Day. If the
Common Stock is not publicly  held or not so listed or traded,  "Current  Market
Price" per share shall mean the fair value per share as determined in good faith
by the Board of Directors of the Company, whose determination shall be described
in a  statement  filed with the  Rights  Agent and shall be  conclusive  for all
purposes.

            (ii) For the  purpose of any  computation  hereunder,  the  "Current
Market  Price" per share (or one  one-hundredth  of a share) of Preferred  Stock
shall be  determined  in the same manner as set forth above for the Common Stock
in clause (i) of this Section 11(d) (other than the last sentence  thereof).  If
the  Current  Market  Price  per  share  (or one  one-hundredth  of a share)  of
Preferred  Stock cannot be  determined  in the manner  provided  above or if the
Preferred  Stock is not publicly held or listed or traded in a manner  described
in clause (i) of this Section  11(d),  the "Current  Market  Price" per share of
Preferred  Stock shall be  conclusively  deemed to be an amount equal to 100 (as
such number may be appropriately adjusted for such events as stock splits, stock
dividends and recapitalizations with respect to the Common Stock occurring after
the date of this Agreement)  multiplied by the Current Market Price per share of
the Common Stock and the "Current Market Price" per one one-hundredth of a share
of Preferred  Stock shall, be equal to the Current Market Price per share of the
Common Stock (as  appropriately  adjusted).  If neither the Common Stock nor the
Preferred Stock is publicly held or so listed or traded,  "Current Market Price"
per shall mean the fair value per share as determined in good faith by the Board
of  Directors  of the  Company,  whose  determination  shall be  described  in a
statement filed with the Rights Agent and shall be conclusive for all purposes.

        (e) Anything  herein to the contrary  notwithstanding,  no adjustment in
the Purchase  Price shall be required  unless such  adjustment  would require an
increase or decrease of at least one percent in the  Purchase  Price;  provided,
however,  that any  adjustments  which by reason of this  Section  11(e) are not
required  to be made shall be  carried  forward  and taken  into  account in any
subsequent  adjustment.  All calculations under this Section 11 shall be made to
the nearest cent or to the nearest  ten-thousandth of a share of Common Stock or
other share or one-hundred-thousandth of a share of Preferred Stock, as the case
may be. Notwithstanding the first sentence of this Section 11(e), any adjustment
required by this Section 11 shall be made no later than the earlier of (i) three
years from the date of the transaction  which mandates such adjustment,  or (ii)
the Expiration Date.

        (f) If as a result of an adjustment  made pursuant to Section  11(a)(ii)
or Section  13(a) hereof,  the holder of any Right  thereafter  exercised  shall
become  entitled  to receive

                                       18

<PAGE>


any shares of capital stock other than Preferred Stock, thereafter the number of
such other  shares so  receivable  upon  exercise of any Right and the  Purchase
Price thereof  shall be subject to adjustment  from time to time in a manner and
on terms as nearly  equivalent as practicable to the provisions  with respect to
the shares of Preferred  Stock  contained in Section 11(a),  (b), (c), (e), (g),
(h), (i), (j), (k) and (m) hereof,  and the  provisions of Sections 7, 9, 10, 13
and 14 hereof with respect to the  Preferred  Stock shall apply on like terms to
any such other shares.

        (g) All  Rights  originally  issued  by the  Company  subsequent  to any
adjustment  made to the Purchase  Price  hereunder  shall  evidence the right to
purchase,  at the  adjusted  Purchase  Price,  the number of shares of Preferred
Stock  purchasable from time to time hereunder upon exercise of the Rights,  all
subject to further adjustment as provided herein.

        (h) Unless the Company shall have  exercised its election as provided in
Section  11(i),  upon each  adjustment of the Purchase  Price as a result of the
calculations made in Sections 11(b) and (c), each Right outstanding  immediately
prior to the making of such adjustment  shall  thereafter  evidence the right to
purchase,  at the adjusted Purchase Price, that number of one one-hundredth of a
share of  Preferred  Stock  (calculated  to the nearest  one-hundred-thousandth)
obtained by (i)  multiplying (x) the number of one  one-hundredth  of a share of
Preferred Stock covered by a Right immediately prior to this adjustment,  by (y)
the  Purchase  Price  in  effect  immediately  prior to such  adjustment  of the
Purchase Price,  and (ii) dividing the product so obtained by the Purchase Price
in effect immediately after such adjustment of the Purchase Price.

        (i) The Company may elect on or after the date of any  adjustment of the
Purchase Price or any adjustment to the number of shares of Preferred  Stock for
which a Right may be  exercised  made  pursuant to Sections  11(a)(i),  11(b) or
11(c), to adjust the number of Rights in lieu of any adjustment in the number of
shares of Preferred Stock  purchasable upon the exercise of a Right. Each of the
Rights  outstanding  after the  adjustment  in the  number  of  Rights  shall be
exercisable  for the number of shares of  Preferred  Stock for which a Right was
exercisable  immediately  prior to such  adjustment.  Each  Right held of record
prior to such  adjustment  of the number of Rights  shall  become that number of
Rights (calculated to the nearest one  hundred-thousandth)  obtained by dividing
the Purchase  Price in effect  immediately  prior to  adjustment of the Purchase
Price by the  Purchase  Price in  effect  immediately  after  adjustment  of the
Purchase  Price.  Company  shall make a public  announcement  of its election to
adjust the number of Rights, indicating the record date for the adjustment, and,
if known at the time, the amount of the adjustment to be made.  This record date
may be the date on which the Purchase  Price is adjusted or any day  thereafter,
but,  if the Right  Certificates  have been  issued,  shall be at least ten days
later than the date of the public announcement.  If Right Certificates have been
issued,  upon each  adjustment of the number of Rights  pursuant to this Section
11(i), the Company shall, as promptly as practicable, cause to be distributed to
holders of record of Right  Certificates on such record date Right  Certificates
evidencing,  subject to Section 14 hereof,  the additional  Rights to which such
holders shall be entitled as a result of such  adjustment,  or, at the option of
the  Company,  shall  cause to be  distributed  to such  holders  of  record  in
substitution  and  replacement for the Right  Certificates  held by such holders
prior to the date of adjustment,  and upon surrender thereof, if required by the
Company, new Right Certificates  evidencing all the Rights to which such holders
shall be entitled after such adjustment. Right Certificates so to be distributed
shall be

                                       19

<PAGE>


issued,  executed and  countersigned  in the manner provided for herein (and may
bear, at the option of the Company,  the adjusted  Purchase  Price) and shall be
registered  in the names of the holders of record of Right  Certificates  on the
record date specified in the public announcement.

        (j)  Irrespective  of any  adjustment or change in the Purchase Price or
the  number of shares of  Preferred  Stock  issuable  upon the  exercise  of the
Rights, the Right Certificates theretofore and thereafter issued may continue to
express  the  Purchase  Price  per share and the  number  of shares  which  were
expressed in the initial Right Certificate issued hereunder.

        (k) Before taking any action that would cause an adjustment reducing the
Purchase Price below the then par value,  if any, of the shares of Common Stock,
Preferred Stock or other capital stock issuable upon exercise of the Rights, the
Company shall take any  corporate  action,  including  using its best efforts to
obtain any  required  stockholder  approvals,  which may,  in the opinion of its
counsel,  be necessary  in order that the Company may validly and legally  issue
fully paid and  nonassessable  shares of Common Stock,  Preferred Stock or other
capital  stock at such  adjusted  Purchase  Price.  If upon any  exercise of the
Rights,  a holder is to receive a  combination  of Common Stock and Common Stock
Equivalents, a portion of the consideration paid upon such exercise, equal to at
least  the then par value of a share of Common  Stock of the  Company,  shall be
allocated  as the  payment  for each  share of Common  Stock of the  Company  so
received.

        (l) In any  case  in  which  this  Section  11  shall  require  that  an
adjustment  in the  Purchase  Price be made  effective as of a record date for a
specified  event,  the Company may elect to defer until the  occurrence  of such
event the issuance to the holder of any Right  exercised  after such record date
the shares of  Preferred  Stock and other  capital  stock or  securities  of the
Company,  if any,  issuable  upon such  exercise  over and  above the  shares of
Preferred  Stock and other capital  stock or securities of the Company,  if any,
issuable upon such  exercise on the basis of the Purchase  Price in effect prior
to such adjustment;  provided,  however,  that the Company shall deliver to such
holder a due bill or other appropriate instrument evidencing such holder's right
to receive such additional  shares of Preferred Stock and other capital stock or
securities upon the occurrence of the event requiring such adjustment.

        (m)  Anything in this Section 11 to the  contrary  notwithstanding,  the
Company  shall be entitled to make such  reductions  in the Purchase  Price,  in
addition to those adjustments  expressly  required by this Section 11, as and to
the extent  that in their  good faith  judgment  the Board of  Directors  of the
Company shall determine to be advisable in order that any (i)  consolidation  or
subdivision  of the  Preferred  Stock,  (ii)  issuance for cash of any shares of
Preferred  Stock at less than the Current Market Price,  (iii) issuance for cash
of shares of Preferred Stock or securities  which by their terms are convertible
into or exchangeable for shares of Preferred Stock,  (iv) stock dividends or (v)
issuance  of  rights,  options  or  warrants  referred  to in this  Section  11,
hereafter  made by the  Company to holders of its  Preferred  Stock shall not be
taxable to such stockholders.

        (n) The  Company  covenants  and agrees  that it shall not,  at any time
after the Distribution  Date, (i) consolidate with any other Person,  (ii) merge
with or into any  other  Person,  or  (iii)  sell or  transfer  (or  permit  any
Subsidiary  to sell or  transfer),  in one  transaction  or a series

                                       20

<PAGE>


of related  transactions,  assets or earning power  aggregating more than 50% of
the assets or earning  power of the  Company  and its  Subsidiaries  (taken as a
whole) to, any other  Person or  Persons,  if (x) at the time of or  immediately
after  such  consolidation,  merger  or sale  there  are any  charter  or by-law
provisions  or  any  rights,   warrants  or  other   instruments  or  securities
outstanding  or agreements in effect which  substantially  diminish or otherwise
eliminate  the  benefits  intended to be afforded by the Rights or (y) prior to,
simultaneously with or immediately after such consolidation, merger or sale, the
stockholders of the Person who constitutes,  or would constitute, the "Principal
Party" for purposes of Section 13(a) hereof shall have  received a  distribution
of  Rights  previously  owned  by  such  Person  or any of  its  Affiliates  and
Associates.  The Company shall not consummate any such consolidation,  merger or
sale unless prior  thereto the Company and such other Person shall have executed
and delivered to the Rights Agent a supplemental agreement evidencing compliance
with this subsection.

        (o) The Company covenants and agrees that, after the Distribution  Date,
it will not, except as permitted by Section 23, Section 24 or Section 27 hereof,
take (or permit any Subsidiary to take) any action if at the time such action is
taken it is reasonably  foreseeable that such action will diminish substantially
or eliminate the benefits intended to be afforded by the Rights.

        (p) Anything in this Agreement to the contrary  notwithstanding,  in the
event that the Company  shall at any time after the Record Date and prior to the
Distribution  Date (i) declare or pay any dividend on the outstanding  shares of
Common Stock payable in shares of Common Stock,  (ii) subdivide the  outstanding
shares of Common Stock, or (iii) combine the outstanding  shares of Common Stock
into a smaller number of shares, the number of Rights associated with each share
of Common Stock then outstanding,  or issued or delivered  thereafter,  shall be
proportionately adjusted so that the number of Rights thereafter associated with
each share of Common Stock  following any such event equals the result  obtained
by multiplying  the number of Rights  associated with each share of Common Stock
immediately  prior to such event by a fraction,  the numerator or which shall be
the  number  of  shares of Common  Stock  outstanding  immediately  prior to the
occurrence  of such event and the  denominator  of which  shall be the number of
shares of Common Stock outstanding  immediately following the occurrence of such
event.

     12.  Certification  of  Adjustments.  Whenever  an  adjustment  is  made as
provided in Sections 11 and 13 hereof,  the Company shall (a) promptly prepare a
certificate  signed by its Chief  Executive  Officer,  its President or any Vice
President and by the  Treasurer or any  Assistant  Treasurer or the Secretary or
any Assistant Secretary of the Company setting forth such adjustment and a brief
statement of the facts giving rise to such  adjustment,  (b) promptly  file with
the Rights Agent and with each transfer  agent for the  Preferred  Stock and the
Common Stock a copy of such  certificate and (c) mail a brief summary thereof to
each holder of a Right  Certificate (or, if prior to the  Distribution  Date, to
each holder of a certificate  representing shares of Common Stock) in accordance
with Section 26 hereof.  Notwithstanding the foregoing sentence,  the failure of
the Company to give such notice shall not affect the validity of or the force or
effect of or the  requirement  for such  adjustment.  The Rights  Agent shall be
fully protected in relying on any certificate  prepared by the Company  pursuant
to Sections 11 and 13 and on any adjustment  therein  contained and shall not be
deemed to have knowledge of any such  adjustment  unless and 

                                       21

<PAGE>


until it  shall  have  received  such  certificate.  Any  adjustment  to be made
pursuant to Sections 11 and 13 of this Rights Agreement shall be effective as of
the date of the event giving rise to such adjustment.

     13. Consolidation, Merger or Sale or Transfer of Assets or Earning Power.

        (a) In the event that following the first occurrence of a Flip-In Event,
directly or indirectly,  (x) the Company shall  consolidate  with, or merge with
and into, any other Person or Persons and the Company shall not be the surviving
or continuing  corporation of such consolidation or merger, or (y) any Person or
Persons shall  consolidate  with, or merge with and into,  the Company,  and the
Company shall be the continuing or surviving  corporation of such  consolidation
or merger and, in connection with such  consolidation or merger,  all or part of
the  outstanding  shares of Common Stock shall be changed into or exchanged  for
stock or other  securities  of any other Person or of the Company or cash or any
other  property  other  than,  in the  case  of the  transactions  described  in
subparagraphs (x) or (y), a merger or consolidation which would result in all of
the Voting  Power  represented  by the  securities  of the  Company  outstanding
immediately   prior  thereto   continuing  to  represent  (either  by  remaining
outstanding or by being converted into  securities of the surviving  entity) all
of the  Voting  Power  represented  by the  securities  of the  Company  or such
surviving entity outstanding  immediately after such merger or consolidation and
the  holders  of  such  securities  not  having  changed  as a  result  of  such
transactions), or (z) the Company or one or more of its Subsidiaries shall sell,
mortgage or otherwise transfer to any other Person or any Affiliate or Associate
of such Person, in one transaction, or a series of related transactions,  assets
or earning power aggregating more than 50% of the assets or earning power of the
Company and its Subsidiaries  (taken as a whole),  then, on the first occurrence
of any such event (a "Flip-Over Event"),  proper provision shall be made so that
(i) each holder of a Right (other than Rights which have become void pursuant to
Section 11(a)(ii)  hereof) shall thereafter have the right to receive,  upon the
exercise  thereof at the Purchase Price (as  theretofore  adjusted in accordance
with Section 11(a)(ii)  hereof),  in accordance with the terms of this Agreement
and in lieu of shares of Preferred  Stock or Common  Stock of the Company,  such
number of validly authorized and issued,  fully paid,  non-assessable and freely
tradeable  shares  of  Common  Stock of the  Principal  Party  (as such  term is
hereinafter defined),  not subject to any liens,  encumbrances,  rights of first
refusal or other adverse claims,  as shall equal the result obtained by dividing
the Purchase Price (as theretofore adjusted in accordance with Section 11(a)(ii)
hereof) by 50% of the Current Market Price per share of the Common Stock of such
Principal  Party  (determined  pursuant to Section  11(d) hereof) on the date of
consummation of such consolidation, merger, sale or transfer; provided, however,
that the Purchase  Price (as  theretofore  adjusted in  accordance  with Section
11(a)(ii)  hereof)  and the number of shares of Common  Stock of such  Principal
Party so  receivable  upon  exercise  of a Right  shall be  subject  to  further
adjustment as appropriate in accordance with Section 11(f) hereof to reflect any
events  occurring in respect of the Common Stock of such  Principal  Party after
the  occurrence  of such  consolidation,  merger,  sale or  transfer;  (ii) such
Principal Party shall  thereafter be liable for, and shall assume,  by virtue of
such Flip-Over  Event, all the obligations and duties of the Company pursuant to
this Rights Agreement;  (iii) the term "Company" for all purposes of this Rights
Agreement shall  thereafter be deemed to refer to such Principal Party, it being
specifically  intended that the provisions of Section 11 hereof shall only apply
to such Principal Party following the first occurrence of a Flip-Over Event; and
(iv) such Principal Party shall take such steps

                                       22

<PAGE>


(including, but not limited to, the reservation of a sufficient number of shares
of its Common Stock in accordance  with Section 9 hereof) in connection with the
consummation  of any such  transaction  as may be  necessary  to assure that the
provisions  hereof shall  thereafter be applicable,  as nearly as reasonably may
be, in relation to its shares of Common Stock  thereafter  deliverable  upon the
exercise of the Rights; provided,  however, that, upon the subsequent occurrence
of  any  merger,  consolidation,  sale  of  all  or  substantially  all  assets,
recapitalization,   reclassification   of   shares,   reorganization   or  other
extraordinary  transaction in respect of such Principal Party,  each holder of a
Right shall  thereupon be entitled to receive,  upon  exercise of a Right,  such
cash, shares,  rights,  warrants and other property which such holder would have
been  entitled  to receive  had he, at the time of such  transaction,  owned the
shares of Common Stock of the Principal Party purchasable upon the exercise of a
Right,  and such  Principal  Party  shall  take such steps  (including,  but not
limited  to,  reservation  of shares of stock) as may  necessary  to permit  the
subsequent  exercise of the Rights in accordance  with the terms hereof for such
cash, shares, rights, warrants and other property.

        (b) "Principal Party" shall mean

            (i) in the case of any  transaction  described  in (x) or (y) of the
first sentence of Section 13(a) hereof; (A) the Person that is the issuer of the
securities  into which  shares of Common  Stock of the Company are  converted in
such merger or  consolidation,  or, if there is more than one such  issuer,  the
issuer the Common Stock of which has the greatest  aggregate market value or (B)
if no  securities  are so issued,  (x) the Person that is the other party to the
merger or consolidation and that survives said merger or  consolidation,  or, if
there is more than one such Person, the Person the Common Stock of which has the
greatest market value or (y) if the Person that is the other party to the merger
or consolidation  does not survive the merger or consolidation,  the Person that
does survive the merger or consolidation (including the Company if it survives);
and

            (ii) in the case of any  transaction  described  in (z) of the first
sentence in Section  13(a)  hereof,  the Person that is the party  receiving the
greatest  portion of the assets or earning  power  transferred  pursuant to such
transaction  or  transactions,  or,  if each  Person  that  is a  party  to such
transaction or  transactions  receives the same portion of the assets or earning
power so  transferred  or if the Person  receiving  the greatest  portion of the
assets or earning  power cannot be  determined,  whichever of such Persons as is
the issuer of Common Stock having the greatest  aggregate market value of shares
outstanding;

provided,  however,  that in any such case described in the foregoing  (b)(i) or
(b)(ii),  (1) if the Common Stock of such Person is not at such time and has not
been continuously over the preceding 12-month period registered under Section 12
of the  Exchange  Act,  and such  Person is a direct or indirect  Subsidiary  of
another Person the Common Stock of which is and has been so registered, the term
"Principal  Party" shall refer to such other Person,  or (2) if such Person is a
Subsidiary,  directly or indirectly,  of more than one Person, the Common Stocks
of all of which  are and have been so  registered,  the term  "Principal  Party"
shall  refer to  whichever  of such  Persons is the  issuer of the Common  Stock
having the greatest market value of shares outstanding, or (3) if such Person is
owned, directly or indirectly,  by a joint venture formed by two or more Persons
that are not owned,  directly or indirectly,  by the same Person,  the rules set

                                       23

<PAGE>


forth in clauses (1) and (2) above  shall apply to each of the owners  having an
interest in the joint  venture as if the Person owned by the joint venture was a
Subsidiary of both or all of such joint  venturers,  and the Principal  Party in
each such case shall bear the  obligations  set forth in this  Section 13 in the
same ratio as its interest in such Person bears to the total of such interests.

        (c) The Company shall not consummate any consolidation,  merger, sale or
transfer  referred to in Section 13(a) unless the  Principal  Party shall have a
sufficient  number of  authorized  shares of its Common Stock that have not been
issued or reserved  for issuance to permit the exercise in full of the Rights in
accordance  with this  Section 13 and unless  prior  thereto the Company and the
Principal Party involved therein shall have executed and delivered to the Rights
Agent an agreement  confirming  that the  requirements of Sections 13(a) and (b)
hereof shall promptly be performed in accordance  with their terms and that such
consolidation,  merger, sale or transfer of assets shall not result in a default
by the Principal  Party under this Rights  Agreement as the same shall have been
assumed by the  Principal  Party  pursuant to Sections  13(a) and (b) hereof and
further  providing  that, as soon as practicable  after executing such agreement
pursuant to this Section 13, the Principal Party at its own expense shall:

            (i) prepare and file a registration  statement  under the Securities
Act, if  necessary,  with respect to the Rights and the  securities  purchasable
upon  exercise of the Rights on an  appropriate  form,  use its best  efforts to
cause such  registration  statement to become  effective as soon as  practicable
after such filing and use its best efforts to cause such registration  statement
to remain  effective (with a prospectus at all times meeting the requirements of
the Act) until the date of expiration of the Rights,  and similarly  comply with
applicable state securities laws;

            (ii) use its best  efforts,  if the  Common  Stock of the  Principal
Party  shall  become  listed  on a  national  securities  exchange,  to list (or
continue the listing of) the Rights and the securities purchasable upon exercise
of the  Rights on such  securities  exchange  and,  if the  Common  Stock of the
Principal Party shall not be listed on a national securities exchange,  to cause
the  Rights  and the  securities  purchased  upon  exercise  of the Rights to be
reported by NASDAQ or such other system then in use;

            (iii)  deliver  to  holders  of  the  Rights  historical   financial
statements  for the  Principal  Party  which  comply  in all  respects  with the
requirements  for  registration  on Form 10 (or any  successor  form)  under the
Exchange Act; and

            (iv)  obtain  waivers of any rights of first  refusal or  preemptive
rights in respect of the shares of Common Stock of the  Principal  Party subject
to purchase upon exercise of outstanding Rights.

In the event that any of the  transactions  described  in Section  13(a)  hereof
shall  occur at any time after the  occurrence  of a  transaction  described  in
Section 11(a)(ii)  hereof,  the Rights which have not theretofore been exercised
shall thereafter be exercisable in the manner described in Section 13(a).

        (d) Furthermore, in case the Principal Party which is to be a party to a
transaction  referred  to in  this  Section  13  has a  provision  in any of its
authorized securities or in its

                                       24

<PAGE>


Certificate  of  Incorporation  or By-laws  or other  instrument  governing  its
corporate  affairs,  which  provision  would have the effect of (i) causing such
Principal  Party to issue,  in  connection  with,  or as a  consequence  of, the
consummation  of a transaction  referred to in this Section 13, shares of Common
Stock of such  Principal  Party at less than the then  Current  Market Price per
share  (determined  pursuant to Section 11(d) hereof) or securities  exercisable
for, or convertible into, Common Stock of such Principal Party at less than such
then  current  market  price  (other than to holders of Rights  pursuant to this
Section 13) or (ii) providing for any special payment, tax or similar provisions
in  connection  with the  issuance of the Common Stock of such  Principal  Party
pursuant to the  provisions  of Section  13;  then,  in such event,  the Company
hereby agrees with each holder of Rights that it shall not  consummate  any such
transaction unless prior thereto the Company and such Principal Party shall have
executed and delivered to the Rights Agent a  supplemental  agreement  providing
that the provision in question of such Principal Party shall have been canceled,
waived or amended, or that the authorized  securities shall be redeemed, so that
the  applicable  provision  will  have no  effect in  connection  with,  or as a
consequence of, the consummation of the proposed transaction.

     14. Fractional Rights and Fractional Shares.

        (a) The Company shall not be required to issue fractions of Rights or to
distribute Right Certificates which evidence  fractional Rights. In lieu of such
fractional  Rights,  there  shall be paid to the  holders of record of the Right
Certificates  with regard to which such  fractional  Rights  would  otherwise be
issuable,  an  amount in cash  equal to the same  fraction  of the then  current
market value of a whole Right.  For the purposes of this Section 14(a), the then
current  market value of a Right shall be  determined  in the same manner as the
Current Market Price of a share of Common Stock shall be determined  pursuant to
Section 11(d) hereof.

        (b) The Company  shall not be required to issue  fractions  of shares of
Preferred  Stock  (other than  fractions  which are  integral  multiples  of one
one-hundredth  of a share of Preferred  Stock) upon exercise of the Rights or to
distribute  certificates  which evidence  fractional  shares of Preferred  Stock
(other fractions which are integral multiples of one one-hundredth of a share of
Preferred Stock).  Fractions of shares of Preferred Stock in integral  multiples
of one  one-hundredth  of a share of Preferred Stock may, at the election of the
Company,  be  evidenced  by  depositary  receipts,  pursuant  to an  appropriate
agreement  between the Company and a depositary  selected by it,  provided  that
such agreement shall provide that the holders of such depositary  receipts shall
have all the rights,  privileges  and  preferences to which they are entitled as
beneficial  owners  of  the  shares  of  Preferred  Stock  represented  by  such
depositary  receipts.  In lieu of fractional  shares of Preferred Stock that are
not integral  multiples of one  one-hundredth of a share of Preferred Stock, the
Company may pay to the registered holders of Right Certificates at the time such
Rights  are  exercised  as herein  provided  an amount in cash equal to the same
fraction  of the  current  market  value  of one  one-hundredth  of a  share  of
Preferred Stock. For purposes of this Section 14(b), the current market value of
one  one-hundredth  of a share of  Preferred  Stock shall be the Current  Market
Price of a share of Common Stock (as  determined  pursuant to Section  11(d)(ii)
hereof) for the Trading Day immediately prior to the date of such exercise.

        (c) Following the occurrence of a Flip-In  Event,  the Company shall not
be  required  to issue  fractions  of shares or units of Common  Stock or Common
Stock  Equivalents  or

                                       25

<PAGE>


other securities upon exercise of the Rights or to distribute certificates which
evidence  fractional  shares of such Common Stock or Common Stock Equivalents or
other securities.  In lieu of fractional shares or units of such Common Stock or
Common  Stock  Equivalents  or  other  securities,  the  Company  may pay to the
registered  holders of Right  Certificates at the time such Rights are exercised
as herein  provided an amount in cash equal to the same  fraction of the Current
Market Value of a share or unit of such Common Stock or Common Stock  Equivalent
or other  securities.  For purposes of this Section  14(c),  the Current  Market
Value shall be  determined  in the manner set forth in Section  11(d) hereof for
the  Trading Day  immediately  prior to the date of such  exercise  and, if such
Common Stock  Equivalent is not traded,  each such Common Stock Equivalent shall
have the value of one one-hundredth of a share of Preferred Stock.

        (d) The holder of a Right by the acceptance of a Right expressly  waives
his right to receive any fractional Right or any fractional shares upon exercise
of a Right.

     15.  Rights of Action.  All rights of action in respect of this  Agreement,
other than any rights of action vested in the Rights Agent  pursuant to Sections
18 and 20 below,  are  vested in the  respective  holders of record of the Right
Certificates  (and, prior to the Distribution Date, the holders of record of the
Common Stock);  and any holder of record of any Right  Certificate (or, prior to
the Distribution  Date, of the Common Stock),  without the consent of the Rights
Agent  or of the  holder  of any  other  Right  Certificate  (or,  prior  to the
Distribution Date, of the Common Stock),  may, in his own behalf and for his own
benefit,  enforce, and may institute and maintain any suit, action or proceeding
against the Company or any other Person to enforce,  or otherwise act in respect
of, his right to exercise the Rights evidenced by such Right  Certificate in the
manner  provided  in  such  Right  Certificate  and in this  Agreement.  Without
limiting the foregoing or any remedies available to the holders of Rights, it is
specifically  acknowledged that the holders of Rights would not have an adequate
remedy at law for any breach of this Agreement and, accordingly,  that they will
be entitled to specific  performance of the  obligations  under,  and injunctive
relief against actual or threatened violations of, the obligations of any Person
subject to this  Agreement.  Holders of Rights  shall be entitled to recover the
reasonable costs and expenses,  including  attorneys' fees,  incurred by them in
any action to enforce the provisions of this Agreement.

     16.  Agreement of Right  Holders.  Every holder of a Right by accepting the
same  consents  and agrees with the Company and the Rights  Agent and with every
other holder of a Right that:

        (a) prior to the Distribution  Date, the Rights will not be evidenced by
a Right  Certificate  and  will be  transferable  only in  connection  with  the
transfer of Common Stock;

        (b)  after  the  Distribution  Date,  the  Right  Certificates  will  be
transferable  only on the registry  books of the Rights Agent if  surrendered at
the office of the Rights Agent  designated  for such  purpose,  duly endorsed or
accompanied by a proper instrument of transfer;

        (c) the  Company  and the Rights  Agent may deem and treat the person in
whose  name the Right  Certificate  (or,  prior to the  Distribution  Date,  the
associated Common

                                       26

<PAGE>


Stock certificate) is registered as the absolute owner thereof and of the Rights
evidenced thereby  (notwithstanding any notations of ownership or writing on the
Right  Certificate or the  associated  Common Stock  certificate  made by anyone
other than the Company or the Rights Agent or the  transfer  agent of the Common
Stock) for all purposes whatsoever, and neither the Company nor the Rights Agent
shall be affected by any notice to the contrary; and

        (d) notwithstanding anything in this Agreement to the contrary,  neither
the Company nor the Rights  Agent  shall have any  liability  to any holder of a
Right or other  Person  as a  result  of its  inability  to  perform  any of its
obligations  under this  Agreement  by reason of any  preliminary  or  permanent
injunction  or other  order,  decree  or ruling  issued by a court of  competent
jurisdiction  or by a  governmental,  regulatory  or  administrative  agency  or
commission,  or any statute,  rule, regulation or executive order promulgated or
enacted by any  governmental  authority,  prohibiting  or otherwise  restraining
performance of such obligation; provided, however, that the Company must use its
best  efforts  to have any such  order,  decree  or ruling  lifted or  otherwise
overturned as soon as possible.

     17.  Right  Certificate  Holder  Not Deemed a  Stockholder.  No holder of a
Right, as such, shall be entitled to vote, receive dividends in respect of or be
deemed for any purpose to be the holder of Common Stock or any other  securities
of the  Company  which  may at any time be  issuable  upon the  exercise  of the
Rights,  nor shall  anything  contained  herein or in any Right  Certificate  be
construed to confer upon the holder of any Right  Certificate,  as such,  any of
the rights of a stockholder  of the Company or any right to vote in the election
of  directors  or upon any  matter  submitted  to  stockholders  at any  meeting
thereof,  or to give or withhold consent to any corporate  action, or to receive
notice of meetings or other actions affecting  stockholders  (except as provided
in Section 25 hereof), or to receive dividends or subscription rights in respect
of any such  stock or  securities,  or  otherwise,  until  the  Right or  Rights
evidenced by such Right Certificate shall have been exercised in accordance with
the provisions hereof.

     18. Concerning the Rights Agent.

        (a)  The  Company   agrees  to  pay  to  the  Rights  Agent   reasonable
compensation for all service rendered by it hereunder and, from time to time, on
demand of the Rights Agent,  its reasonable  expenses and counsel fees and other
disbursements  incurred  in the  administration  and  execution  of this  Rights
Agreement and the exercise and performance of its duties hereunder.  The Company
also agrees to indemnify the Rights Agent for, and to hold it harmless  against,
any loss,  liability or expense incurred without gross negligence,  bad faith or
willful misconduct on the part of the Rights Agent for any thing done or omitted
to  be  done  by  the  Rights  Agent  in  connection  with  the  acceptance  and
administration  of this Rights  Agreement,  including  the cost and  expenses of
defending against any claim of liability in the premises. The indemnity provided
herein shall survive the  expiration of the Rights and the  termination  of this
Rights Agreement. Anything in this agreement to the contrary notwithstanding, in
no event shall the Rights Agent be liable for special, indirect or consequential
loss or  damage  of any  kind  whatsoever  (including  but not  limited  to lost
profits),  even if the Rights Agent has been advised of the  likelihood  of such
loss damage and regardless of the form of action.

                                       27

<PAGE>


        (b) The Rights Agent shall be protected and shall incur no liability for
or in respect of any action taken,  suffered or omitted by it in connection with
its  administration  of  this  Rights  Agreement  in  reliance  upon  any  Right
Certificate,  certificate  for Common Stock or other  securities of the Company,
instrument of assignment or transfer, power of attorney, endorsement, affidavit,
letter, notice,  direction,  consent,  certificate,  statement or other paper or
document  believed by it to be genuine  and to be signed,  executed  and,  where
necessary,  guaranteed,  verified  or  acknowledged,  by the  proper  Person  or
Persons.

     19. Merger or Consolidation or Changed Name of Rights Agent.

        (a) Any corporation  into which the Rights Agent or any successor Rights
Agent may be merged or with  which it may be  consolidated,  or any  corporation
resulting  from any merger or  consolidation  to which the  Rights  Agent or any
successor  Rights Agent shall be a party, or any  corporation  succeeding to the
corporate trust or stock transfer  business of the Rights Agent or any successor
Rights Agent,  shall be the  successor to the Rights Agent under this  Agreement
without the  execution  or filing of any paper or any further act on the part of
any of the parties hereto,  provided that such corporation would be eligible for
appointment  as a  successor  Rights  Agent under the  provisions  of Section 21
hereof.  In case at the time such  successor  Rights Agent shall  succeed to the
agency created by this Agreement,  any of the Right Certificates shall have been
countersigned  but not delivered,  any such successor Rights Agent may adopt the
countersignature  of  the  predecessor  Rights  Agent  and  deliver  such  Right
Certificates  so  countersigned;  and,  in case at that  time  any of the  Right
Certificates shall not have been  countersigned,  any successor Rights Agent may
countersign such Right Certificates either in the name of the predecessor Rights
Agent or in the name of the successor  Rights Agent;  and in all such cases such
Right  Certificates shall have the full force provided in the Right Certificates
and in this Agreement.

        (b) In case at any time the name of the  Rights  Agent  shall be changed
and at such time any of the Right Certificates shall have been countersigned but
not delivered,  the Rights Agent may adopt the countersignature  under its prior
name and deliver such Right  Certificates so countersigned;  and in case at that
time any of the Right Certificates shall not have been countersigned, the Rights
Agent may countersign such Right Certificates either in its prior name or in its
changed name; and in all such cases such Right  Certificate  shall have the full
force provided in the Right Certificates and in this Rights Agreement.

     20.  Duties of Rights  Agent.  The Rights Agent  undertakes  the duties and
obligations  imposed  by this  Rights  Agreement  upon the  following  terms and
conditions,  by all of which the Company and the holders of Right  Certificates,
by their acceptance thereof, shall be bound:

        (a) The Rights  Agent may consult  with legal  counsel (who may be legal
counsel  for the  Company),  and the opinion of such  counsel  shall be full and
complete authorization and protection to the Rights Agent as to any action taken
or omitted to be taken by it in good faith and in accordance with such opinion.

        (b)  Whenever  in  the  performance  of its  duties  under  this  Rights
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter (including,  without

                                       28

<PAGE>


limitation,  the  identity  of any  Acquiring  Person and the  determination  of
"Current  Market Price") be proved or established by the Company prior to taking
or suffering any action hereunder, such fact or matter (unless other evidence in
respect  thereof  be  herein  specifically  prescribed)  may  be  deemed  to  be
conclusively  proved and  established by certificate  signed by the President or
any Vice  President  and by the  Treasurer  or any  Assistant  Treasurer  or the
Secretary or any Assistant  Secretary of the Company and delivered to the Rights
Agent; and such certificate shall be full  authorization to the Rights Agent for
any action  taken or suffered in good faith by it under the  provisions  of this
Rights Agreement in reliance upon such certificate.

        (c) The Rights  Agent shall be liable  hereunder  only for its own gross
negligence, bad faith or willful misconduct.

        (d) The Rights  Agent shall not be liable for or by reason of any of the
statements  of fact or recitals  contained  in this Rights  Agreement  or in the
Right  Certificates  (except  its  countersignature  thereof)  or be required to
verify the same, but all such statements and recitals are and shall be deemed to
have been made by the Company only.

        (e) The Rights Agent shall not be under any responsibility in respect of
the validity of this Rights  Agreement  or the  execution  and  delivery  hereof
(except  the due  execution  hereof by the  Rights  Agent) or in  respect of the
validity or  execution  of any Right  Certificate  (except its  countersignature
thereof);  nor shall it be  responsible  for any  breach by the  Company  of any
covenant  or  condition  contained  in this  Rights  Agreement  or in any  Right
Certificate;  nor shall it be responsible for any adjustment  required under the
provisions  of Sections 11, 13, 23 or 24 hereof or  responsible  for the manner,
method or amount of any such adjustment or the  ascertaining of the existence of
facts  that  would  require  any such  adjustment  (except  with  respect to the
exercise  of  Rights  evidenced  by  Right   Certificates  after  receipt  of  a
Certificate  furnished  pursuant to Section 12 describing any such  adjustment);
nor  shall it by any act  hereunder  be  deemed  to make any  representation  or
warranty as to the authorization or reservation of any shares of Common Stock to
be issued  pursuant to this Rights  Agreement or any Right  Certificate or as to
whether any shares of Common Stock will, when issued, be validly  authorized and
issued, fully paid and nonassessable.

        (f) The Company agrees that it will perform,  execute,  acknowledge  and
deliver or cause to be performed, executed,  acknowledged and delivered all such
further and other acts, instruments and assurances as may reasonably be required
by the Rights Agent for the carrying  out or  performing  by the Rights Agent of
the provisions of this Rights Agreement.

        (g) The  Rights  Agent is  hereby  authorized  and  directed  to  accept
instructions  with respect to the  performance of its duties  hereunder from the
Chairman of the Board,  the Chief Executive  Officer,  the President or any Vice
President or the  Secretary or any  Assistant  Secretary or the Treasurer or any
Assistant Treasurer of the Company,  and to apply to such officers for advice or
instructions in connection  with its duties,  and it shall not be liable for any
action  taken or  suffered  to be taken by it in good faith in  accordance  with
instructions  of any such  officer.  Any  application  by the  Rights  Agent for
written  instructions  from the Company may, at the option of the Rights  Agent,
set forth in writing  any action  proposed  to be taken or omitted by the Rights
Agent under this Rights Agreement and the date on and/or after which such action
shall be taken

                                       29

<PAGE>


or such omission shall be effective. Subject to Section 20(c) hereof, the Rights
Agent shall not be liable for any action  taken by, or  omission  of, the Rights
Agent in accordance with a proposal included in any such application on or after
the date specified in such  application  (which date shall not be less than five
Business Days after the date any officer of the Company  actually  receives such
application,  unless  any such  officer  shall have  consented  in writing to an
earlier date) unless,  prior to taking any such action (or the effective date in
the  case  of an  omission),  the  Rights  Agent  shall  have  received  written
instructions in response to such  application  specifying the action to be taken
or omitted.

        (h) The Rights Agent and any stockholder,  director, officer or employee
of the  Rights  Agent  may  buy,  sell  or deal in any of the  Rights  or  other
securities of the Company or become pecuniarily interested in any transaction in
which the  Company  may be  interested,  or  contract  with or lend money to the
Company  or  otherwise  act as fully and freely as though it were not the Rights
Agent under this Rights  Agreement.  Nothing  herein  shall  preclude the Rights
Agent from acting in any other capacity for the Company or for any other entity.

        (i) The  Rights  Agent may  execute  and  exercise  any of the rights or
powers hereby vested in it or perform any duty hereunder  either itself or by or
through its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the  Company  resulting  from any such  act,  default,
neglect or misconduct,  provided  reasonable care was exercised in the selection
and continued employment thereof.

        (j) No provision  of this  Agreement  shall  require the Rights Agent to
expend or risk its own funds or otherwise  incur any financial  liability in the
performance  of any of its duties  hereunder or in the exercise of its rights if
there shall be reasonable  grounds for believing that repayment of such funds or
adequate  indemnification  against  such  risk or  liability  is not  reasonably
assured to it.

        (k) If, with respect to any Right Certificate  surrendered to the Rights
Agent  for  exercise  or  transfer,  the  certificate  contained  in the form of
assignment or the form of election to purchase set forth on the reverse thereof,
as the case may be, has either not been  completed or  indicates an  affirmative
response  to clause 1 and/or 2  thereof,  the  Rights  Agent  shall not take any
further action with respect to such requested exercise of transfer without first
consulting with the Company.

     21. Change of Rights Agent.  The Rights Agent or any successor Rights Agent
may resign and be discharged from its duties under this Rights Agreement upon 30
days'  notice  in  writing,  or such  earlier  period  as shall be  agreed to in
writing, mailed to the Company and to each transfer agent of the Common Stock by
registered or certified  mail, and to the holders of the Right  Certificates  by
first-class  mail.  The  Company  may remove the Rights  Agent or any  successor
Rights Agent (with or without  cause) upon 30 days'  notice in writing,  or such
earlier  period as shall be agreed to in writing,  mailed to the Rights Agent or
successor  Rights Agent,  as the case may be, and to each transfer  agent of the
Common Stock by  registered or certified  mail,  and to the holders of the Right
Certificates by first-class mail. If the Rights Agent shall resign or be removed
or shall  otherwise  become  incapable of acting,  the Company  shall  appoint a
successor

                                       30

<PAGE>


to the Rights Agent.  Notwithstanding  the foregoing  provisions of this Section
21, in no event shall the  resignation or removal of a Rights Agent be effective
until a successor  Rights Agent shall have been appointed and have accepted such
appointment.  If the Company shall fail to make such appointment within a period
of 30 days after such  removal or after it has been  notified in writing of such
resignation or incapacity by the resigning or  incapacitated  Rights Agent or by
the holder of a Right Certificate (who shall, with such notice, submit his Right
Certificate for inspection by the Company),  then the incumbent  Rights Agent or
the  holder  of  record  of any  Right  Certificate  may  apply to any  court of
competent  jurisdiction for the appointment of a new Rights Agent. Any successor
Rights Agent,  whether appointed by the Company or by such a court, shall be (a)
a corporation  organized and doing  business under the laws of the United States
or any State thereof,  in good standing,  which is authorized under such laws to
exercise  corporate trust or stock transfer powers and is subject to supervision
or  examination  by federal or state  authority and which has at the time of its
appointment  as  Rights  Agent  a  combined  capital  and  surplus  of at  least
$50,000,000 or (b) an Affiliate controlled by a corporation  described in clause
(a) of this sentence.  After  appointment,  the successor  Rights Agent shall be
vested with the same powers,  rights,  duties and  responsibilities as if it had
been  originally  named as Rights  Agent  without  further act or deed;  but the
predecessor  Rights  Agent shall  deliver and transfer to the  successor  Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance,  conveyance, act or deed necessary for the purpose. Not later
than the effective  date of any such  appointment  the Company shall file notice
thereof in writing with the predecessor  Rights Agent and each transfer agent of
the Common Stock, and mail a notice thereof in writing to the registered holders
of the Right  Certificates.  Failure  to give any  notice  provided  for in this
Section 21,  however,  or any defect  therein,  shall not affect the legality or
validity of the resignation or removal of the Rights Agent or the appointment of
the successor Rights Agent, as the case may be.

     22.  Issuance  of  New  Right  Certificates.  Notwithstanding  any  of  the
provisions  of this  Rights  Agreement  or of the  Rights to the  contrary,  the
Company may, at its option,  issue new Right  Certificates  evidencing Rights in
such form as may be approved by its Board of Directors to reflect any adjustment
or change  in the  Purchase  Price per share and the  number or kind or class of
shares of stock or other  securities  or  property  purchasable  under the Right
Certificates made in accordance with the provisions of this Rights Agreement. In
addition,  in  connection  with the  issuance or sale of shares of Common  Stock
following the Distribution Date and prior to the redemption or expiration of the
Rights,  the Company shall,  with respect to shares of Common Stock so issued or
sold  pursuant to the exercise of stock  options or under any  employee  plan or
arrangement,  or  upon  the  exercise,  conversion  or  exchange  of  securities
hereinafter  issued  by  the  Company,  in  each  case  existing  prior  to  the
Distribution Date, issue Right Certificates  representing the appropriate number
of Rights in connection with such issuance or sale; provided,  however, that (i)
no such  Right  Certificate  shall be issued if,  and to the  extent  that,  the
Company  shall  be  advised  by  counsel  that  such  issuance  would  create  a
significant  risk of  material  adverse tax  consequences  to the Company or the
Person to whom such Right  Certificate  would be issued,  and (ii) no such Right
Certificate shall be issued, if, and to the extent that,  appropriate adjustment
shall otherwise have been made in lieu of the issuance thereof.

                                       31

<PAGE>


     23. Redemption.

        (a) The Board of  Directors  of the Company  may, at its option,  at any
time prior to the earlier of (x) the first  occurrence of a Flip-In Event or (y)
the Close of Business on the Expiration  Date,  redeem all but not less than all
the then  outstanding  Rights at a redemption  price of $.001 per Right, as such
amount may be appropriately  adjusted to reflect any stock split, stock dividend
or similar  transaction  occurring after the date hereof (such  redemption price
being hereinafter referred to as the "Redemption Price").

        (b) Immediately upon the action of the Board of Directors of the Company
ordering  the  redemption  of the  Rights (or at such later time as the Board of
Directors may establish for the effectiveness of such  redemption),  and without
any further action and without any notice, the right to exercise the Rights will
terminate  and the only right  thereafter  of the holders of Rights  shall be to
receive the Redemption  Price.  The Company shall promptly give public notice of
any such redemption;  provided, however, that the failure to give, or any defect
in, any such notice  shall not affect the  validity of such  redemption.  Within
(10) days after such action of the Board of Directors ordering the redemption of
the Rights (or such later time as the Board of Directors  may  establish for the
effectiveness of such redemption), the Company shall mail a notice of redemption
to all the holders of the then  outstanding  Rights at their last  addresses  as
they  appear  upon the  registry  books of the  Rights  Agent  or,  prior to the
Distribution  Date, on the registry  books of the transfer  agent for the Common
Stock.  Any notice which is mailed in the manner herein provided shall be deemed
given,  whether or not the  holder  receives  the  notice.  Each such  notice of
redemption  shall state the method by which the payment of the Redemption  Price
will be made.  The failure to give notice  required by this Section 23(b) or any
defect  therein shall not affect the legality or validity of the action taken by
the Company.

        (c) In the case of a  redemption  permitted  under  Section  23(a),  the
Company may, at its option, discharge all of its obligations with respect to the
Rights by (i) issuing a press release announcing the manner of redemption of the
Rights  and (ii)  mailing  payment  of the  Redemption  Price to the  registered
holders of the Rights at their last  addresses  as they  appear on the  registry
books of the Rights Agent or, prior to the  Distribution  Date,  on the registry
books of the  transfer  agent of the Common  Stock,  and upon such  action,  all
outstanding Right Certificates shall be null and void without any further action
by the Company.

     24. Exchange of Rights for Common Stock.

        (a) The Board of  Directors  of the Company  may, at its option,  at any
time after the occurrence of a Flip-In  Event,  exchange all or part of the then
outstanding and exercisable Rights (which (i) shall not include Rights that have
become  void  pursuant to the  provisions  of Section  11(a)(ii)  and (ii) shall
include,  without  limitation,  any Rights issued after the Distribution Date in
accordance  with Section 22) for shares of Common Stock at an exchange  ratio of
one share of Common Stock per Right, appropriately adjusted to reflect any stock
split,  stock dividend or similar  transaction  occurring  after the date hereof
(such exchange  ratio being  hereinafter  referred to as the "Exchange  Ratio").
Notwithstanding  the foregoing the Board of

                                       32

<PAGE>


Directors  shall not be empowered to effect such  exchange at any time after any
Person  (other  than  an  Exempt  Person),  together  with  all  Affiliates  and
Associates  of such  Person,  becomes the  Beneficial  Owner of shares of Common
Stock  aggregating  50% or more of the shares of Common Stock then  outstanding.
From and after the occurrence of an event specified in Section 13(a) hereof, any
Rights that theretofore  have not been exchanged  pursuant to this Section 24(a)
shall  thereafter be exercisable  only in accordance with Section 13 and may not
be exchanged pursuant to this Section 24(a).

        (b) Immediately upon the action of the Board of Directors of the Company
ordering the exchange of any Rights  pursuant to Sub Section (a) of this Section
24 and without any further action and without any notice,  the right to exercise
such Rights shall  terminate  and the only right  thereafter of a holder of such
Rights  shall be to receive  that number of shares of Common  Stock equal to the
number of such Rights held by such holder  multiplied by the Exchange Ratio. The
Company  shall  promptly  give  public  notice of any such  exchange;  provided,
however,  that the  failure to give,  or any defect in,  such  notice  shall not
affect the validity of such exchange.  The Company  promptly shall mail a notice
of any  such  exchange  to all of the  holders  of such  Rights  at  their  last
addresses as they appear upon the registry books of the Rights Agent. Any notice
which is mailed in the manner herein provided shall be deemed given,  whether or
not the holder receives the notice.  Each such notice of exchange will state the
method by which the  exchange  of the shares of Common  Stock for Rights will be
effected and, in the event of any partial  exchange,  the number of Rights which
will be exchanged.  Any partial exchange shall be effected pro rata based on the
number of Rights  (other  than Rights  which have  become  void  pursuant to the
provisions of Section 11(a)(ii) hereof) held by each holder of Rights.

        (c) In any exchange  pursuant to this  Section 24, the  Company,  at its
option,  may  substitute,  and, in the event that there shall not be  sufficient
shares of Common Stock issued but not  outstanding or authorized but unissued to
permit any exchange of Rights as  contemplated  in accordance  with this Section
24, the Company shall substitute to the extent of such  insufficiency,  for each
share of Common Stock that would otherwise be issuable upon exchange of a Right,
a number  of shares of  Preferred  Stock or  fractions  thereof  (or  equivalent
preferred  shares, as such term is defined in Section 11(b)) having an aggregate
current per share market price  (determined  pursuant to Section  11(d)  hereof)
equal to the  current  per  share  market  price of one  share of  Common  Stock
(determined  pursuant  to Section  11(d)  hereof) as of the date of the  Flip-In
Event.

        (d) In the event that  there  shall not be  sufficient  shares of Common
Stock  issued but not  outstanding  or  authorized  but  unissued  to permit any
exchange  of Rights as  contemplated  in  accordance  with this  Section 24, the
Company  shall take all such action as may be necessary to authorize  additional
shares of Common Stock for issuance upon exchange of the Rights.

        (e) The Company  shall not be required to issue  fractions  of shares of
Common Stock or to distribute  certificates which evidence  fractional shares of
Common Stock.  In lieu of such  fractional  shares of Common Stock,  the Company
shall pay to the  registered  holders of the Right  Certificates  with regard to
which such  fractional  shares of Common  Stock would  otherwise  be issuable an
amount in cash equal to the same fraction of the current market value of a whole

                                       33

<PAGE>


share of Common  Stock.  For the  purposes of this  paragraph  (d),  the current
market value of a whole share of Common Stock shall be the Current  Market Price
of a share of Common Stock (as defined in Section  11(d) hereof for the purposes
of computations made other than pursuant to Section  11(a)(iii)) for the Trading
Day immediately prior to the date of exchange pursuant to this Section 24.

     25. Notice of Proposed Actions.

        (a) In case the Company,  after the Distribution Date, shall propose (i)
to effect any of the transactions  referred to in Section 11(a)(i) or to pay any
dividend to the holders of record of its Preferred Stock payable in stock of any
class  or to make  any  other  distribution  to the  holders  of  record  of its
Preferred Stock (other than a regular periodic cash dividend),  or (ii) to offer
to the holders of record of its Preferred Stock or options,  warrants,  or other
rights to subscribe for or to purchase shares of Preferred Stock  (including any
security  convertible  into or  exchangeable  for Preferred  Stock) or shares of
stock of any other class or any other securities, options, warrants, convertible
or   exchangeable   securities  or  other   rights,   or  (iii)  to  effect  any
reclassification   of  its   Preferred   Stock   or  any   recapitalization   or
reorganization  of the Company,  or (iv) to effect any  consolidation  or merger
with or into, or to effect any sale or other  transfer (or to permit one or more
of its  Subsidiaries  to  effect  any  sale or other  transfer),  in one or more
transactions, of more than 50% of the assets or earning power of the Company and
its Subsidiaries  (taken as a whole) to, any other Person or Persons,  or (v) to
effect the liquidation,  dissolution or winding up of the Company, then, in each
such  case,  the  Company  shall  give  to  each  holder  of  record  of a Right
Certificate,  in  accordance  with  Section 26 hereof,  notice of such  proposed
action, which shall specify the record date for the purposes of such transaction
referred to in Section 11(a)(i),  or such dividend or distribution,  or the date
on which such reclassification, recapitalization, reorganization, consolidation,
merger, sale or transfer of assets, liquidation, dissolution or winding up is to
take  place and the record  date for  determining  participation  therein by the
holders of record of Preferred  Stock, if any such date is to be fixed, and such
notice shall be so given in the case of any action covered by clause (i) or (ii)
above at least 10 days  prior to the  record  date for  determining  holders  of
record of the  Preferred  Stock for purposes of such action,  and in the case of
any such other action,  at least 10 days prior to the date of the taking of such
proposed action or the date of participation therein by the holders of record of
Preferred Stock, whichever shall be the earlier.

        (b) In case any of the transactions  referred to in Section 11(a)(ii) or
Section 13 of this Rights  Agreement are proposed,  then, in any such case,  the
Company  shall give to each  holder of Rights,  in  accordance  with  Section 26
hereof,  notice of the  proposal of such  transaction  at least 10 days prior to
consummating such transaction, which notice shall specify the proposed event and
the  consequences  of the event to holders of Rights under Section  11(a)(ii) or
Section 13 hereof,  as the case may be, and, upon consummating such transaction,
shall similarly give notice thereof to each holder of Rights.

        (c) The failure to give notice required by this Section 25 or any defect
therein  shall not affect the  legality or  validity of the action  taken by the
Company or the vote upon any such action.

                                       34

<PAGE>


     26. Notices.  Notices or demands  authorized by this Rights Agreement to be
given or made by the  Rights  Agent or by the  holder  of  record  of any  Right
Certificate or Right to or on behalf of the Company shall be sufficiently  given
or made if sent by first-class mail,  postage prepaid,  addressed (until another
address is filed in writing with the Rights Agent) as follows:

                           SciClone Pharmaceuticals, Inc.
                           901 Mariner's Island Boulevard
                           San Mateo, California  94404
                           Attention:  Chief Financial Officer

Subject to the provisions of Section 20 hereof,  any notice or demand authorized
by this Rights  Agreement to be given or made by the Company or by the holder of
record of any Right  Certificate  or Right to or on the  Rights  Agent  shall be
sufficiently  given  or  made  if sent by  first-class  mail,  postage  prepaid,
addressed  (until  another  address is filed in  writing  with the  Company)  as
follows:

                           ChaseMellon Shareholder Services, L.L.C.
                           50 California Street
                           San Francisco, CA  94111
                           Attention:  Relationship Management

Notices or demands  authorized  by this Rights  Agreement to be given or made by
the Company or the Rights Agent to the holder of record of any Right Certificate
or  Right  shall be  sufficiently  given  or made if sent by  first-class  mail,
postage  prepaid,  addressed  to such holder at the address of such holder as it
appears  upon  the  registry  books  of  the  Rights  Agent  or,  prior  to  the
Distribution Date, on the registry books of the Transfer Agent.

     27.  Supplements  and  Amendments.  Except as provided  in the  penultimate
sentence of this Section 27, for so long as the Rights are then redeemable,  the
Company may in its sole and absolute  discretion,  and the Rights Agent shall if
the Company so directs,  supplement or amend any provision of this  Agreement in
any respect without the approval of any holders of the Rights.  At any time when
the Rights  are no longer  redeemable,  except as  provided  in the  penultimate
sentence of this Section 27, the Company may, and the Rights Agent shall, if the
Company so directs,  supplement or amend this Agreement  without the approval of
any  holders of Rights  Certificates  in order to (i) cure any  ambiguity,  (ii)
correct or supplement any provision  contained  herein which may be defective or
inconsistent  with any other  provisions  herein,  (iii) shorten or lengthen any
time period hereunder,  or (iv) change or supplement the provisions hereunder in
any manner which the Company may deem  necessary or desirable;  provided that no
such supplement or amendment shall adversely affect the interests of the holders
of Rights as such (other than an  Acquiring  Person or an Affiliate or Associate
of an Acquiring  Person),  and no such  amendment  may cause the Rights again to
become redeemable or cause the Agreement again to become amendable other than in
accordance with this sentence. Notwithstanding anything contained in this Rights
Agreement  to the  contrary,  no  supplement  or  amendment  shall be made which
changes the Redemption Price.  Prior to the Distribution  Date, the interests of
the  holders of Rights  shall be deemed  coincident  with the  interests  of the
holders of Common Stock.

                                       35

<PAGE>


     28.  Successors.  All  of the  covenants  and  provisions  of  this  Rights
Agreement  by or for the benefit of the  Company or the Rights  Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

     29.  Benefits of this Rights  Agreement.  Nothing in this Rights  Agreement
shall be construed to give to any person or corporation  other than the Company,
the Rights  Agent and the  registered  holders of the Right  Certificates  (and,
prior to the Distribution  Date, the Common Stock) any legal or equitable right,
remedy or claim under this Rights Agreement;  but this Rights Agreement shall be
for the sole and  exclusive  benefit of the  Company,  the Rights  Agent and the
holders  of record of the Right  Certificates  (and,  prior to the  Distribution
Date, the Common Stock).

     30. Governing Law. This Rights Agreement and each Right Certificate  issued
hereunder  shall be deemed to be a contract  made under the laws of the State of
Delaware and for all purposes  shall be governed by and  construed in accordance
with the  laws of such  state  applicable  to  contracts  to be made  solely  by
residents of such state and performed entirely within such state.

     31.  Counterparts.  This Rights  Agreement may be executed in any number of
counterparts and each of such  counterparts  shall for all purposes be deemed to
be an original,  and all such counterparts shall together constitute but one and
the same instrument.

     32. Descriptive  Headings.  Descriptive headings of the several sections of
this Rights Agreement are inserted for convenience only and shall not control or
affect the meaning or construction of any of the provisions hereof.

     33. Severability.  If any term, provision,  covenant or restriction of this
Rights Agreement is held by a court of competent jurisdiction or other authority
to be invalid, illegal or unenforceable, the remainder of the terms, provisions,
covenants and  restrictions of this Rights  Agreement shall remain in full force
and effect and shall in no way be affected, impaired or invalidated.

                                       36

<PAGE>


     IN WITNESS WHEREOF, the parties hereto have caused this Rights Agreement to
be duly executed,  and their seals affixed and attested,  all as of the date and
year first above written.

[SEAL]

ATTEST:                                       SCICLONE PHARMACEUTICALS, INC.


By: /s/ Mark A. Culhane                       By: /s/ Donald R. Sellers
  -------------------------------                -------------------------------
  Name: Mark A. Culhane                          Name: Donald R. Sellers
  Title: CFO                                     Title: CEO & President


[SEAL]

ATTEST:                                       CHASE MELLON SHAREHOLDER SERVICES,
                                              L.L.C.


By: /s/ Daniel W. Spengel                     By: /s/ Paul Collins
  -------------------------------                -------------------------------
  Name: Daniel W. Spengel                        Name: Paul Collins
  Title: Assistant Vice President                Title: Assistant Vice President



<PAGE>


                                    EXHIBIT A


                         SCICLONE PHARMACEUTICALS, INC.

                          CERTIFICATE OF DETERMINATION
                           REGARDING THE TERMS OF THE
                            Series B Preferred Stock

     Pursuant  to Section  401 of the  General  Corporation  Law of the State of
California

     1. We, the President and Chief Financial Officer, respectively, of SciClone
Pharmaceuticals, Inc.  (the  "Corporation"),  organized  and existing  under the
General  Corporation  Law of the State of  California,  in  accordance  with the
provisions of Section 401 thereof, DO HEREBY CERTIFY:

     That pursuant to the authority conferred upon the Board of Directors by the
Articles of Incorporation,  as amended, of the said Corporation,  the said Board
of Directors  on July 25,  1997,  adopted the  following  resolution  creating a
series of 2,000,000  shares of Preferred Stock  designated as Series B Preferred
Stock, none of which are issued or outstanding:

         "RESOLVED,  that  pursuant  to the  authority  vested  in the  Board of
     Directors of this  Corporation  in  accordance  with the  provisions of its
     Restated  Articles of  Incorporation,  a series of  Preferred  Stock of the
     Corporation  be and it hereby is created,  and that the  determination  and
     amount  thereof and the powers,  preferences  and relative,  participating,
     optional and other  special  rights of the shares of such  series,  and the
     qualifications, limitations or restrictions thereof are as follows:

         Section 1.  Designation and Amount.  The shares of such series shall be
     designated  as Series B Preferred  Stock (the "Series B Preferred  Stock"),
     $.001 par value  per  share,  and the  number of shares  constituting  such
     series shall be 2,000,000.

         Section 2. Dividends and Distributions.

               (A) The  holders of Series B  Preferred  Stock  then  outstanding
     shall be entitled to be paid  dividends as follows for each share of Series
     B Preferred Stock then held by them, first,  prior and in preference to any
     outstanding  shares  of Series A  Preferred  Stock and  Common  Stock.  The
     dividend  rate on the shares of Series B Preferred  Stock shall be for each
     quarterly  dividend  (hereinafter  referred  to  as a  "quarterly  dividend
     period"),  which  quarterly  dividend  periods shall commence on January 1,
     April 1, July 1 and  October 1 each year (each such date being  referred to
     herein as a "Quarterly  Dividend Payment Date") (or in the case of original
     issuance,  from the date of original issuance) and shall end on and include
     the day  next  preceding  the  first  date of the next  quarterly  dividend
     period,  at a rate per quarterly  dividend  period  (rounded to the nearest
     cent) equal to the  greater of (a) $75.00 or (b) subject to the  provisions
     for  adjustment  hereinafter  set forth,  100 times the aggregate per share
     amount of all cash dividends,  and 100 times the

                                       1

<PAGE>


     aggregate  per share  amount  (payable in cash,  based upon the fair market
     value at the time the non-cash  dividend or other  distribution is declared
     as  determined  in good faith by the Board of  Directors)  of all  non-cash
     dividends or other distributions other than a dividend payable in shares of
     Common Stock or a subdivision of the outstanding shares of Common Stock (by
     reclassification or otherwise),  declared (but not withdrawn) on the Common
     Stock,  no par value,  of the  Corporation  (the "Common Stock") during the
     immediately  preceding  quarterly  dividend period, or, with respect to the
     first quarterly  dividend period,  since the first issuance of any share or
     fraction  of a share  of  Series  B  Preferred  Stock.  In the  event  this
     Corporation   shall  at  any  time  after  August  15,  1997  (the  "Rights
     Declaration  Date") (i) declare any  dividend  on Common  Stock  payable in
     shares of Common Stock,  (ii) subdivide the  outstanding  Common Stock,  or
     (iii) combine the outstanding Common Stock into a smaller number of shares,
     then in each such case the  amount to which  holders  of shares of Series B
     Preferred Stock were entitled  immediately prior to such event under clause
     (b) of the preceding  sentence shall be adjusted by multiplying such amount
     by a  fraction  the  numerator  of which is the  number of shares of Common
     Stock outstanding immediately after such event and the denominator of which
     is the number of shares of Common Stock that were  outstanding  immediately
     prior to such event.

               (B)  Dividends  on the Series B  Preferred  Stock  shall begin to
     accrue and be cumulative on outstanding  shares of Series B Preferred Stock
     from the Quarterly  Dividend  Payment Date next preceding the date of issue
     of such  shares of Series B  Preferred  Stock,  unless the date of issue of
     such  shares is prior to the record date for the first  Quarterly  Dividend
     Payment Date, in which case  dividends on such shares shall begin to accrue
     from the date of issue of such  shares,  or  unless  the date of issue is a
     Quarterly  Dividend Payment Date or is a date after the record date for the
     determination  of holders of shares of Series B Preferred Stock entitled to
     receive a quarterly  dividend and before such  Quarterly  Dividend  Payment
     Date, in either of which events such dividends shall begin to accrue and be
     cumulative from such Quarterly  Dividend  Payment Date.  Accrued but unpaid
     dividends shall not bear interest. Dividends paid on the shares of Series B
     Preferred  Stock in an amount less than the total amount of such  dividends
     at the time accrued and payable on such shares shall be allocated  pro rata
     on a  share-by-share  basis among all such shares at the time  outstanding.
     The  Board of  Directors  may fix a record  date for the  determination  of
     holders of shares of Series B Preferred  Stock entitled to receive  payment
     of a dividend or distribution declared thereon,  which record date shall be
     no more than 45 days prior to the date fixed for the payment thereof.

         Section 3. Voting  Rights.  The holders of shares of Series B Preferred
     Stock shall have the following voting rights:

               (A)  Subject to the  provision  for  adjustment  hereinafter  set
     forth,  each share of Series B  Preferred  Stock  shall  entitle the holder
     thereof to 100 votes on all matters submitted to a vote of the stockholders
     of the  Corporation.  In the event the Corporation  shall at any time after
     the Rights  Declaration  Date (i)  declare  any  dividend  on Common  Stock
     payable in shares of Common Stock,  (ii) subdivide the  outstanding  Common
     Stock, or (iii) combine the outstanding  Common Stock into a smaller number
     of  shares,  then in each such case the  number of votes per share to which
     holders of shares of Series B  Preferred  Stock were  entitled  immediately
     prior to such event  shall be  adjusted

                                       2

<PAGE>


     by  multiplying  such number by a fraction  the  numerator  of which is the
     number of shares of Common Stock  outstanding  immediately after such event
     and the  denominator  of which is the number of shares of Common Stock that
     were outstanding immediately prior to such event.

               (B) Except as  otherwise  provided  herein,  in the  Articles  of
     Incorporation,  as  amended,  or by law,  the holders of shares of Series A
     Preferred  Stock,  Series B  Preferred  Stock and the  holders of shares of
     Common Stock shall vote together as one class on all matters submitted to a
     vote of stockholders of the Corporation.

               (C)  Except  as  set  forth  herein,   in  the   Certificate   of
     Incorporation and in the By-laws, holders of Series B Preferred Stock shall
     have no special  voting  rights  and their  consent  shall not be  required
     (except  to the extent  they are  entitled  to vote with  holders of Common
     Stock as set forth herein) for taking any corporate action.

        Section 4.  Reacquired  Shares.  Any shares of Series B Preferred  Stock
     purchased or otherwise acquired by the Corporation in any manner whatsoever
     shall be retired and canceled promptly after the acquisition  thereof.  All
     such shares shall upon their  cancellation  become  authorized but unissued
     shares of  Preferred  Stock and may be  reissued as part of a new series of
     Preferred  Stock to be created by resolution or resolutions of the Board of
     Directors, subject to the conditions and restrictions on issuance set forth
     herein.

         Section 5. Liquidation, Dissolution or Winding Up.

               (A) In the event of any  voluntary  or  involuntary  liquidation,
     dissolution or winding up of the  Corporation,  the holders of the Series B
     Preferred  Stock  then  outstanding  shall be  entitled,  for each share of
     Series B Preferred Stock then held by them, first,  prior and in preference
     to any Series A Preferred Stock and Common Stock, to receive the greater of
     (a)   $3,000.00  per  share,   plus  accrued   dividends  to  the  date  of
     distribution,  whether  or not  earned or  declared,  or (b) an amount  per
     share, subject to the provision for adjustment hereinafter set forth, equal
     to 100 times the aggregate amount to be distributed per share to holders of
     Common  Stock.  In the event the  Corporation  shall at any time  after the
     Rights Declaration Date (i) declare any dividend on Common Stock payable in
     shares of Common Stock,  (ii) subdivide the  outstanding  Common Stock,  or
     (iii) combine the outstanding Common Stock into a smaller number of shares,
     then in each such case the  amount to which  holders  of shares of Series B
     Preferred Stock were entitled  immediately  prior to such event pursuant to
     clause (b) of the preceding  sentence shall be adjusted by multiplying such
     amount by a  fraction  the  numerator  of which is the  number of shares of
     Common Stock  outstanding  immediately after such event and the denominator
     of which is the  number of shares of  Common  Stock  that were  outstanding
     immediately prior to such event.

         Section 6.  Consolidation,  Merger,  etc. In case the Corporation shall
     enter into any consolidation,  merger,  combination or other transaction in
     which the shares of Common  Stock are  exchanged  for or changed into other
     stock or securities,  cash and/or any other property, then in any such case
     the shares of Series B Preferred Stock shall at

                                       3

<PAGE>


     the same time be  similarly  exchanged  or  changed  in an amount per share
     (subject to the provision for  adjustment  hereinafter  set forth) equal to
     100 times the aggregate amount of stock, securities,  cash and/or any other
     property  (payable  in kind),  as the case may be,  into which or for which
     each  share of  Common  Stock is  changed  or  exchanged.  In the event the
     Corporation shall at any time after the Rights Declaration Date (i) declare
     any  dividend  on Common  Stock  payable  in shares of Common  Stock,  (ii)
     subdivide the  outstanding  Common Stock,  or (iii) combine the outstanding
     Common  Stock into a smaller  number of shares,  then in each such case the
     amount set forth in the preceding  sentence with respect to the exchange or
     change  of  shares  of  Series  B  Preferred  Stock  shall be  adjusted  by
     multiplying  such amount by a fraction the numerator of which is the number
     of shares of Common Stock outstanding  immediately after such event and the
     denominator  of which is the  number of shares  of Common  Stock  that were
     outstanding immediately prior to such event.

         Section 7. No Redemption.  The shares of Series B Preferred Stock shall
     not be redeemable.

         Section 8. Fractional Shares. Series B Preferred Stock may be issued in
     fractions of a share which shall entitle the holder,  in proportion to such
     holder's  fractional shares, to exercise voting rights,  receive dividends,
     participate  in  distributions  and have the benefit of all other rights of
     holders of Series B Preferred  Stock.  All  payments  made with  respect to
     fractional shares hereunder shall be rounded to the nearest whole cent.

         Section 9. Certain Restrictions.

               (A)  Whenever   quarterly   dividends   or  other   dividends  or
     distributions  payable  on the  Series B  Preferred  Stock as  provided  in
     Section 2 are in  arrears,  thereafter  and until all  accrued  and  unpaid
     dividends and distributions, whether or not declared, on shares of Series B
     Preferred Stock  outstanding  shall have been paid in full, the Corporation
     shall not:

                  (i) declare or pay dividends on, make any other  distributions
         on, or redeem or purchase or otherwise  acquire for  consideration  any
         shares  of  stock  ranking  junior  (either  as to  dividends  or  upon
         liquidation,  dissolution  or  winding  up) to the  Series B  Preferred
         Stock;

                  (ii)   declare  or  pay   dividends   on  or  make  any  other
         distributions  on any shares of stock ranking on a parity (either as to
         dividends  or upon  liquidation,  dissolution  or winding  up) with the
         Series B Preferred Stock, except dividends paid ratably on the Series B
         Preferred  Stock  and all such  parity  stock on  which  dividends  are
         payable or in arrears in  proportion  to the total amounts to which the
         holders of all such shares are then entitled;

                  (iii)   redeem  or   purchase   or   otherwise   acquire   for
         consideration  shares of any stock  ranking  on a parity  (either as to
         dividends  or upon  liquidation,  dissolution  or winding  up) with the
         Series B Preferred Stock, provided that the Corporation may at any time
         redeem,  purchase or otherwise  acquire shares of any

                                       4

<PAGE>


         such  parity  stock  in  exchange  for  shares  of  any  stock  of  the
         Corporation ranking junior (either as to dividends or upon dissolution,
         liquidation or winding up) to the Series B Preferred Stock; or

                  (iv)  purchase  or  otherwise  acquire for  consideration  any
         shares of Series B Preferred Stock, or any shares of stock ranking on a
         parity with the Series B Preferred  Stock,  except in accordance with a
         purchase offer made in writing or by publication  (as determined by the
         Board of  Directors)  to all  holders of such shares upon such terms as
         the Board of Directors,  after  consideration of the respective  annual
         dividend  rates  and  other  relative  rights  and  preferences  of the
         respective Series and classes shall determine in good faith will result
         in fair and equitable treatment among the respective series or classes.

               (B) The  Corporation  shall  not  permit  any  subsidiary  of the
     Corporation to purchase or otherwise  acquire for  consideration any shares
     of stock of the Corporation  unless the Corporation  could, under paragraph
     (A) of this Section 9,  purchase or  otherwise  acquire such shares at such
     time and in such manner.

         Section 10.  Ranking.  The Series B Preferred  Stock shall be junior to
     all later authorized Series of the Corporation's  preferred stock as to the
     payment of dividends and the  distribution  of assets,  unless the terms of
     any series shall provide otherwise.

         Section 11.  Amendment.  The Restated  Articles of Incorporation of the
     Corporation shall not be amended in any manner which would materially alter
     or change  the  powers,  preferences  or  special  rights  of the  Series B
     Preferred Stock so as to affect them adversely without the affirmative vote
     of the holders of two-thirds or more of the outstanding  shares of Series B
     Preferred Stock voting together as a single class."

     2. There are no shares of Series A Preferred Stock outstanding.

     IN WITNESS WHEREOF, we have executed and subscribed this Certificate and do
affirm the  foregoing  as true under the  penalties  of perjury  this 8th day of
August, 1997 under the laws of the State of California.


                                                       /s/ Donald R. Sellers
                                                       -------------------------
                                                       Donald R. Sellers,
                                                       President



                                                       /s/ Mark A. Culhane
                                                       -------------------------
                                                       Mark A. Culhane,
                                                       Chief  Financial Officer

                                       5


<PAGE>


                                    EXHIBIT B

                          [Form of Right Certificate]

Certificate No. W-                                              _________ Rights

     NOT EXERCISABLE AFTER JULY 24, 2007 OR EARLIER IF REDEEMED OR EXCHANGED. AT
     THE OPTION OF THE COMPANY, THE RIGHTS MAY BE REDEEMED AT $.001 PER RIGHT OR
     EXCHANGED  FOR  PREFERRED  STOCK  ON THE  TERMS  SET  FORTH  IN THE  RIGHTS
     AGREEMENT. IN THE EVENT THAT THE RIGHTS REPRESENTED BY THIS CERTIFICATE ARE
     ISSUED TO A PERSON WHO IS AN ACQUIRING PERSON OR CERTAIN  TRANSFEREE OF THE
     RIGHTS  PREVIOUSLY  OWNED BY SUCH PERSONS,  THIS RIGHT  CERTIFICATE AND THE
     RIGHTS  REPRESENTED  HEREBY  SHALL BE NULL AND VOID AND WILL NO  LONGER  BE
     TRANSFERABLE.


                                RIGHT CERTIFICATE

                         SCICLONE PHARMACEUTICALS, INC.

     This  certifies  that   ______________,   or  registered  assigns,  is  the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement  dated as of July  25,  1997  ("Rights  Agreement")  between  SciClone
Pharmaceuticals, Inc., a California  corporation  ("Company"),  and  ChaseMellon
Shareholder  Services,  L.L.C. ("Rights Agent"), to purchase from the Company at
any time  after the  Distribution  Date (as such term is  defined  in the Rights
Agreement)  and  prior to 2:00 p.m.  California  time on July 24,  1997,  at the
principal  office of the  Rights  Agent,  or its  successors  as  Rights  Agent,
designated  for  such  purposes,   one   one-hundredth   of  a  fully  paid  and
nonassessable  share of  Series B  Preferred  Stock of the  Company  ("Preferred
Stock") at a purchase price of $30.00 per one  one-hundredth  of a share, as the
same may from time to time be adjusted in accordance  with the Rights  Agreement
("Purchase  Price"),  upon  presentation and surrender of this Right Certificate
with the Form of Election  to Purchase  duly  executed.  Capitalized  terms used
herein and not otherwise defined herein shall have the meanings ascribed to such
terms in the Rights Agreement.

                                       1

<PAGE>


     As provided in the Rights  Agreement,  the Purchase Price and the number of
shares of Preferred  Stock or other  securities  which may be purchased upon the
exercise  of the Rights  evidenced  by this  Right  Certificate  are  subject to
modification  and adjustment  upon the happening of certain events and, upon the
happening of certain events, securities other than shares of Preferred Stock, or
other  property,  may be acquired upon exercise of the Rights  evidenced by this
Right Certificate, as provided by the Rights Agreement.

     Upon the  occurrence of a Flip-In  Event,  if the Rights  evidenced by this
Rights  Certificate  are  beneficially  owned by (i) an  Acquiring  Person or an
Affiliate or Associate of any such  Acquiring  Person,  (ii) a transferee of any
such  Acquiring  Person,   Associate  or  Affiliate,   or  (iii)  under  certain
circumstances  specified in the Rights Agreement,  a transferee of a person who,
after such transfer,  became an Acquiring  Person, or any Affiliate or Associate
of an Acquiring Person, such Rights shall be null and void and will no longer be
transferable  and no holder  hereof  shall have any right  with  respect to such
Rights from and after the occurrence of such Flip-In Events.

     This  Right  Certificate  is  subject  to all  the  terms,  provisions  and
conditions of the Rights Agreement,  which terms,  provisions and conditions are
incorporated  herein by  reference  and made a part  hereof and to which  Rights
Agreement  reference  is  hereby  made  for a full  description  of the  rights,
limitations of rights,  obligations,  duties and immunities of the Rights Agent,
the  Company  and  the  holders  of  record  of the  Right  Certificates,  which
limitation of rights include the temporary  suspension of the  exercisability of
such Rights under the specific  circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the principal  executive office of
the Company and are available upon written request to the Company.

     This Right  Certificate,  with or without  other Right  Certificates,  upon
surrender at the  principal  office of the Rights  Agent,  may be exchanged  for
another  Right  Certificate  or  Right

                                       2

<PAGE>


Certificates  of like tenor and date evidencing  Rights  entitling the holder of
record to purchase a like aggregate  number of shares of Preferred  Stock as the
Rights  evidenced by the Right  Certificate  or Right  Certificates  surrendered
shall have entitled such holder to purchase.  If this Right Certificate shall be
exercised  in part,  the holder  shall be  entitled  to receive  upon  surrender
hereof,  another Right Certificate or Right Certificates for the number of whole
Rights not exercised.

     Subject to the provisions of the Rights Agreement, at any time prior to the
earlier of (i) the occurrence of a Flip-In Event (as such term is defined in the
Rights  Agreement) or (ii) the  Expiration  Date (as such term is defined in the
Rights  Agreement),  the Rights evidenced by this Certificate may be redeemed by
the Company at its option at a redemption  price of $.001 per Right.  Subject to
the provisions of the Rights  Agreement,  the Company may, at its option, at any
time after a Flip-In Event, exchange all or part of the Rights evidenced by this
Certificate for shares of the Company's  Common Stock or for Preferred Stock (or
shares of a class or series of the  Company's  preferred  stock  having the same
rights, privileges and preferences as the Preferred Stock).

     In the event (i) any person or group  becomes an  Acquiring  Person or (ii)
any of the types of  transactions,  acquisitions or other events described above
as self-dealing  transactions occur, and prior to the acquisition by such person
or group of 50% or more of the outstanding shares of Common Stock, the Board may
require all or any portion of the outstanding Rights (other than Rights owned by
such  Acquiring  Person which have become void) to be exchanged for Common Stock
on a pro rata basis,  at an exchange  ratio of one share of Common  Stock or one
one-hundredth  of a share of Preferred Stock (or of a share of a class or series
of the Company's  Preferred  Stock having  equivalent  rights,  preferences  and
privileges), per Right (subject to adjustment).

     No fractional  shares of Preferred  Stock shall be issued upon the exercise
of any Right or Rights evidenced hereby (other than fractions which are integral
multiples of one one-hundredth of a

                                       3

<PAGE>


share of Preferred Stock, which may, at the option of the Company,  be evidenced
by depository receipts), and no fractional shares of Common Stock will be issued
upon the exchange of any Right or Rights evidenced hereby,  and in lieu thereof,
as provided in the Rights  Agreement,  fractions of shares of Preferred Stock or
Common Stock shall  receive an amount in cash equal to the same  fraction of the
then Current Market Price (as such term is defined in the Rights Agreement) of a
share of Preferred Stock or Common Stock, as the case may be.

     No holder of this Right Certificate,  as such, shall be entitled to vote or
receive  dividends or be deemed for any purpose the holder of Common Stock or of
any other  securities  of the  Company  which may at any time be issuable on the
exercise hereof,  nor shall anything contained in the Rights Agreement or herein
be construed to confer upon the holder  hereof,  as such, any of the rights of a
stockholder of the Company or any right to vote in the election of directors; or
upon any matter submitted to stockholders at any meeting thereof,  or to give or
withhold  consent to any  corporate  action or to receive  notice of meetings or
other actions  affecting  stockholders  (other than certain actions specified in
the Rights  Agreement)  or to  receive  dividends  or  subscription  rights,  or
otherwise,  until the Right or Rights evidenced by this Right  Certificate shall
have been exercised or exchanged as provided in the Rights Agreement.

     This Right  Certificate  shall not be valid or  obligatory  for any purpose
until it shall have been countersigned by the Rights Agent.

                                       4

<PAGE>


     WITNESS the facsimile  signature of the proper  officers of the Company and
its corporate seal. Dated as of _______________, 19__.

ATTEST:                                           SCICLONE PHARMACEUTICALS, INC.

______________________                            By:__________________________
Secretary
                                                  Title:_______________________


COUNTERSIGNED:                                    CHASEMELLON SHAREHOLDER 
                                                  SERVICES, L.L.C.
                                                  As Rights Agent

                                                  By:__________________________
                                                     Authorized Officer

                                       5

<PAGE>


                    Form of Reverse Side of Right Certificate

                               FORM OF ASSIGNMENT

             (To be executed by the registered holder if such holder
                  desires to transfer any or all of the Rights
                     represented by this Right Certificate)

     FOR VALUE  RECEIVED,  the undersigned  hereby sells,  assigns and transfers
unto

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

- ------------------------------------------------------------------------------
                   (Name, address and social security or other
                        identifying number of transferee)

___________________________________  (_______________) of the Rights represented
by this Right Certificate, together with all right, title and interest in and to
said    Rights,    and   hereby    irrevocably    constitutes    and    appoints
_________________________  attorney to transfer  said Rights on the books of the
within-named Company with full power of substitution.

         Dated:___________________, 19__.         ______________________________
                                                  (Signature)

Signature Guaranteed:


                                   CERTIFICATE

     The undersigned hereby certifies by checking the appropriate boxes that:

     (1) the  rights  evidenced  by this Right  Certificate  [ ] are [ ] are not
being sold,  assigned and  transferred by or on behalf of a Person who is or was
an  Acquiring  Person  (as such  capitalized  terms are  defined  in the  Rights
Agreement);

     (2) after due inquiry and to the best knowledge of the undersigned,  it [ ]
did [ ] did not acquire the Rights evidenced by this Right  Certificate from any
Person who is or was an  Acquiring  Person or an  Affiliate  or  Associate of an
Acquiring Person or any transferee of such Persons.

         Dated:___________________, 19__.         ______________________________
                                                  (Signature)

Signature Guaranteed:

                                       6

<PAGE>


                    Form of Reverse Side of Right Certificate
                                   (continued)


                                     NOTICE

     The signatures to the foregoing  Assignment and the foregoing  Certificate,
if  applicable,  must  correspond  to the name as written  upon the face of this
Right Certificate in every particular,  without alteration or enlargement or any
change  whatsoever,  and must be  guaranteed  by a  participant  in a Securities
Transfer Association ("STA") recognized signature program.

     In the event that the  foregoing  Certificate  is not duly  executed,  with
signature guaranteed,  the Company may deem the Rights represented by this Right
Certificate to be Beneficially  Owned by an Acquiring  Person or an Affiliate or
Associate of an Acquiring Person (as such  capitalized  terms are defined in the
Rights Agreement),  and not issue any Right Certificate or Right Certificates in
exchange for this Right Certificate.

                                       7

<PAGE>


                      Form of Reverse of Right Certificate
                                   (continued)

                          FORM OF ELECTION TO PURCHASE

             (To be executed by the registered holder if such holder
                  desires to exercise any or all of the Rights
                     represented by this Right Certificate)

To SciClone Pharmaceuticals, Inc.:

     The  undersigned  hereby  irrevocably  elects to  exercise  _______________
(__________) of the Rights represented by this Right Certificate to purchase the
shares of the Common  Stock of the  Company,  or other  securities  or  property
issuable  upon the  exercise  of said  number of Rights  pursuant  to the Rights
Agreement.

     The undersigned  hereby requests that a certificate for any such securities
and any such property be issued in the name of and delivered to:

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

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


                   (Name, address and social security or other
                          identifying number of issuee)

         The undersigned  hereby further  requests that if said number of Rights
shall not be all the Rights represented by this Right  Certificate,  a new Right
Certificate  for the  remaining  balance of such Rights be issued in the name of
and delivered to:

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

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


                   (Name, address and social security or other
                          identifying number of issuee)


         Dated:___________________, 19__.         ______________________________
                                                  (Signature)

Signature Guaranteed:

                                       8

<PAGE>


                    Form of Reverse Side of Right Certificate
                                   (continued)


                                   CERTIFICATE

     The undersigned hereby certifies by checking the appropriate boxes that:

     (1) the  Rights  evidenced  by this Right  Certificate  [ ] are [ ] are not
being exercised by or on behalf of a Person who is or was an Acquiring Person or
an  Affiliate  or  Associate  of any such  Acquiring  Person or an  Affiliate or
Associate of any such  Acquiring  Person (as such terms are defined  pursuant to
the Rights Agreement);

     (2) after due inquiry and to the best knowledge of the undersigned,  it [ ]
did [ ] did not acquire the Rights evidenced by this Right  Certificate from any
Person who is or was an  Acquiring  Person or an  Affiliate  or  Associate of an
Acquiring Person or any transferee of such Persons.

         Dated:___________________, 19__.         ______________________________
                                                  (Signature)

Signature Guaranteed:


                                     NOTICE

     The  signature  to the  foregoing  Election to Purchase  and the  foregoing
Certificate, if applicable, must correspond to the name as written upon the face
of the  this  Right  Certificate  in every  particular,  without  alteration  or
enlargement or any change whatsoever, and must be guaranteed by a member firm of
a registered national securities  exchange, a member of the National Association
of Securities  Dealers,  Inc., or a commercial  bank or trust company  having an
office or correspondent in the United States.

     In the event that the foregoing Certificate is not executed, with signature
guaranteed,   the  Company  may  deem  the  Rights  represented  by  this  Right
Certificate to be Beneficially  Owned by an Acquiring  Person or an Affiliate or
Associate of an Acquiring Person (as such  capitalized  terms are defined in the
Rights Agreement),  and not issue any Right Certificate or Right Certificates in
exchange for this Right Certificate.

                                       9

<PAGE>


                                    EXHIBIT C

UNDER CERTAIN CIRCUMSTANCES, AS SET FORTH IN THE RIGHTS AGREEMENT, RIGHTS ISSUED
TO,  BENEFICIALLY  OWNED BY OR  TRANSFERRED  TO ANY  PERSON WHO IS OR BECOMES AN
ACQUIRING  PERSON (AS  DEFINED  IN THE  RIGHTS  AGREEMENT)  OR AN  ASSOCIATE  OR
AFFILIATE (AS DEFINED IN THE RIGHTS AGREEMENT)  THEREOF AND CERTAIN  TRANSFEREES
THEREOF WILL BE NULL AND VOID AND WILL NO LONGER BE TRANSFERABLE.


                         SCICLONE PHARMACEUTICALS, INC.

                               Summary of Terms of
                                Rights Agreement


Nature of Right:         When exercisable, each Right (a "Right") will initially
                         entitle the holder to purchase one  one-hundredth  of a
                         share of Series B Preferred Stock  ("Preferred  Stock")
                         of SciClone Pharmaceutical, Inc. (the "Company").

Means of Distribution:   The  Rights  will  be  distributed  to  holders  of the
                         Company's outstanding Common Stock as a dividend of one
                         Right for each share of Common  Stock.  The Rights will
                         also be  attached  to all  future  issuances  of Common
                         Stock  prior  to  the  Distribution  Date  (as  defined
                         below).

Exercisability:          Rights  become  exercisable  on the earlier of: (i) the
                         tenth day following the date of public  announcement by
                         the  Company or by any  person or group (an  "Acquiring
                         Person")   that  such  person  or  group  has  acquired
                         beneficial  ownership  of 15% or more of the  Company's
                         outstanding  Common Stock,  or (ii) the tenth  business
                         day  (unless  extended by the Board prior to the time a
                         person  becomes  an  Acquiring  Person)  following  the
                         commencement,   or  announcement  of  an  intention  to
                         commence,  by  any  person  or  group  of a  tender  or
                         exchange offer which would result in such person owning
                         15% or  more of the  outstanding  Common  Stock  of the
                         Company  (the  earlier of such dates is  referred to as
                         the  "Distribution  Date"),  provided that an Acquiring
                         Person does not include an Exempt  Person (as such term
                         is defined in the Rights Agreement).  Rights will trade
                         separately from the Common Stock once the Rights become
                         exercisable.

Exercise Price:          $30 per share, which is the amount that in the judgment
                         of the  Board of  Directors  represents  the  long-term
                         value of the  Common  Stock over the term of the Rights
                         Agreement (the "Exercise Price").

Term:                    The  Rights  will  expire  upon the  earlier of (i) ten
                         years after the date of  issuance,  or July 24, 2007 or
                         (ii) redemption or exchange by the Company as described
                         below.

Redemption of Rights:    Rights are  redeemable  at a price of $0.001 per Right,
                         by the vote of the Company's Board of Directors, at any
                         time until the  occurrence of a Flip-In Event  (defined
                         below).

Preferred Stock:         The Preferred  Stock  purchasable  upon exercise of the
                         Rights  will be  nonredeemable  and junior to any other
                         series of preferred stock the

                                       1

<PAGE>


                         Company  may issue  (unless  otherwise  provided in the
                         terms of such other  series).  Each share of  Preferred
                         Stock  will have a  preferential  cumulative  quarterly
                         dividend  in an  amount  equal  to the  greater  of (a)
                         $75.00 or b) 100 times the  dividend  declared  on each
                         share of Common Stock. In the event of liquidation, the
                         holders of  Preferred  Stock will  receive a  preferred
                         liquidation  payment equal to the greater of (a) $3,000
                         per  share,  plus  accrued  dividends  to the  date  of
                         distribution whether or not earned or declared,  or (b)
                         an amount  per share  equal to 100 times the  aggregate
                         payment to be  distributed  per share of Common  Stock.
                         Each  share of  Preferred  Stock  will have 100  votes,
                         voting together with the shares of Common Stock. In the
                         event of any merger, consolidation or other transaction
                         in which  shares of Common Stock are  exchanged  for or
                         changed  into  other  securities,   cash  and/or  other
                         property,   each  share  of  Preferred  Stock  will  be
                         entitled  to  receive  100 times the amount and type of
                         consideration  received per share of Common Stock.  The
                         rights  of  the   Preferred   Stock  as  to  dividends,
                         liquidation and voting, and in the event of mergers and
                         consolidations,     are    protected    by    customary
                         anti-dilution   provisions.   Fractional   shares   (in
                         integral  multiples of one  one-hundredth) of Preferred
                         Stock will be issuable;  however, the Company may elect
                         to  distribute  depository  receipts  in  lieu  of such
                         fractional  shares.  In lieu of fractional shares other
                         than fractions that are multiples of one  one-hundredth
                         of a share, an adjustment in cash will be made based on
                         the  market  price of the  Preferred  Stock on the last
                         trading date prior to the date of exercise.  Because of
                         the   nature  of  the   Preferred   Stock's   dividend,
                         liquidation  and  voting  rights,   the  value  of  one
                         one-hundredth of a share of Preferred Stock purchasable
                         upon  exercise  of each Right  should  approximate  the
                         value of one share of Common Stock.

Rights in Event of       In the  event  that  an  Acquiring  Person  engages  in
Self-Dealing             certain self-dealing  transactions with the Company, or
Transaction or           a Person becomes the beneficial owner of 15% or more of
Acquisition of           the  outstanding  Common Stock  ("Flip-In  Events"),  a
Substantial Amount       holder a Right  thereafter  has the right to  purchase,
of Common Stock:         upon payment of the then  current  Exercise  Price,  in
                         lieu of one one-hundredth of a share of Preferred Stock
                         per outstanding  Right, such number of shares of Common
                         Stock  having  a  market  value  at  the  time  of  the
                         transaction  equal to the  Exercise  Price  divided  by
                         one-half  the Current  Market  Price (as defined in the
                         Rights Agreement) of the Common Stock.  Notwithstanding
                         the foregoing,  Rights held by the Acquiring  Person or
                         any   Associate   or   Affiliate   thereof  or  certain
                         transferees  will be null  and void  and no  longer  be
                         transferable.

                         Self-dealing  transactions  are  defined  to  include a
                         consolidation,   merger  or  other  combination  of  an
                         Acquiring  Person with the Company in which the Company
                         is the surviving corporation, the transfer of assets to
                         the Company in exchange for  securities of the Company,
                         or otherwise  obtain  securities of the Company  (other
                         than in a pro rata  distribution to all  shareholders),
                         the  sale,  purchase,  transfer,  distribution,  lease,
                         mortgage,  pledge  or  acquisition  of  assets  by  the
                         Acquiring  Person to, from or with the Company on other
                         than  an  arm's  length  basis,   compensation   to  an
                         Acquiring   Person  for   services   (other   than  for
                         employment  as  a  regular  or  part-time  employee  or
                         director on a basis  consistent with the Company's past

                                       2

<PAGE>


                         practice),  a loan  or  provision  of  other  financial
                         assistance (except proportionately as a shareholder) to
                         an  Acquiring  Person or the  licensing,  sale or other
                         transfer of proprietary technology or know-how from the
                         Company to the  Acquiring  Person on terms not approved
                         by  the  Board  of  Directors  or  a  reclassification,
                         recapitalization  or other  transaction with the effect
                         of increasing  by more than 1% the  Acquiring  Person's
                         proportionate  share of any class of  securities of the
                         Company.

Rights in Event of       If,  following the occurrence of a Flip-In  Event,  the
Business Combination:    Company is  acquired by any person in a merger or other
                         business  combination  transaction  in which the Common
                         Stock  is  exchanged  or  converted  or  in  which  the
                         corporation is not the surviving corporation, or 50% or
                         more of its  assets or  earnings  power are sold to any
                         person, each holder of a Right (other than an Acquiring
                         Person,  or  Affiliates or  Associates  thereof)  shall
                         thereafter have the right to purchase,  upon payment of
                         the then current Exercise Price,  such number of shares
                         of  common  stock  of the  acquiring  company  having a
                         current  market  value  equal  to  the  Exercise  Price
                         divided by one-half  the Current  Market  Price of such
                         common stock.

Exchange Option:         In the  event  (i)  any  person  or  group  becomes  an
                         Acquiring   Person   or  (ii)  any  of  the   types  of
                         transactions,  acquisitions  or other events  described
                         above as self-dealing  transactions occur, and prior to
                         the  acquisition by such person or group of 50% or more
                         of the  outstanding  shares of Common Stock,  the Board
                         may  require  all or  any  portion  of the  outstanding
                         Rights  (other  than  Rights  owned  by such  Acquiring
                         Person  which have  become  void) to be  exchanged  for
                         Common Stock on a pro rata basis,  at an exchange ratio
                         of one share of Common Stock or one  one-hundredth of a
                         share of  Preferred  Stock (or of a share of a class or
                         series  of  the   Company's   Preferred   Stock  having
                         equivalent  rights,  preferences and  privileges),  per
                         Right (subject to adjustment).

Fractional Shares:       No  fractional  shares of Common  Stock  will be issued
                         upon  exercise of the Rights and,  in lieu  thereof,  a
                         payment  in cash  will be  made to the  holder  of such
                         Rights equal to the same fraction of the current market
                         value of a share of Common Stock.

Adjustment:              The Exercise Price payable, and the number of shares of
                         Preferred   Stock  or  other   securities  or  property
                         issuable,  upon  exercise  of the Rights are subject to
                         adjustment from time to time to prevent dilution (i) in
                         the event of a stock  dividend  on,  or a  subdivision,
                         combination or reclassification of the Preferred Stock,
                         (ii) upon the grant to holders of the  Preferred  Stock
                         of  certain   rights  or  warrants  to  subscribe   for
                         Preferred Stock or convertible  securities at less than
                         the  current  market  price of the  Preferred  Stock or
                         (iii) upon the distribution to holders of the Preferred
                         Stock of evidences of indebtedness or assets (excluding
                         dividends   payable   in   Preferred   Stock)   or   of
                         subscription  rights  or  warrants  (other  than  those
                         referred  to above).  The  number of Rights  associated
                         with each  share of  Common  Stock is also  subject  to
                         adjustment  in the event of a stock split of the Common
                         Stock or a stock  dividend on the Common Stock  payable
                         in  Common  Stock or  subdivisions,  consolidations  or
                         combinations of the Common Stock

                                       3

<PAGE>


                         occurring,  in any such case, prior to the Distribution
                         Date.

Rights as Shareholder:   The Rights themselves do not entitle the holder thereof
                         to any  rights  as a  shareholder,  including,  without
                         limitation, voting rights or to receive dividends.

Amendment of Rights:     Until the Rights become nonredeemable, the Company may,
                         except with respect to the redemption price,  amend the
                         Agreement  in  any  manner.  After  the  Rights  become
                         nonredeemable,  the Company may amend the  Agreement to
                         cure  any  ambiguity,  to  correct  or  supplement  any
                         provision which may be defective or  inconsistent  with
                         any other  provisions,  to shorten or lengthen any time
                         period  under  the  Rights  Agreement,  or to change or
                         supplement  any provision in any manner the Company may
                         deem  necessary  or  desirable,  provided  that no such
                         amendment  may  adversely  affect the  interests of the
                         holders of the Rights (other than the Acquiring  Person
                         or its Affiliates or Associates) or cause the Rights to
                         again be redeemable or the Agreement to again be freely
                         amendable.



     A copy of the Rights  Agreement  is  available,  free of  charge,  from the
     Company,  901 Mariner's Island  Boulevard,  San Mateo,  California,  94404,
     Attention: Secretary. This summary description of the Rights Agreement does
     not purport to be complete and is qualified in its entirety by reference to
     the Rights  Agreement,  as amended from time to time, which is incorporated
     in this summary description by reference.

                                       4




                   [SciClone Pharmaceuticals, Inc. Letterhead]


                                         Contacts: Mark A. Culhane
                                                   Chief Financial Officer
                                                   SciClone Pharmaceutical, Inc.
                                                   415-358-3456


                         SCICLONE PHARMACEUTICALS, INC.
                        ADOPTS SHAREHOLDERS RIGHTS PLAN


San Mateo, Calif., July 29, 1997--SciClone Pharmaceuticals,  Inc. (NASDAQ: SCLN)
announced  today  that its Board of  Directors  has  adopted a  Preferred  Stock
Purchase  Rights Plan designed to better assist its  shareholders to realize the
full value of their  investment and to provide for fair and equal  treatment for
all  shareholders  in the event of any attempted  takeover of the Company.  This
plan is a common  anti-takeover  instrument  and its  adoption  is intended as a
means to guard against any potential use of coercive  takeover  tactics designed
to gain  control of  SciClone  without  paying all  shareholders  fair and equal
value. This distribution of the Rights is not in response to any known effort or
proposal to acquire control of the Company, SciClone.

Under the plan, shareholders will receive one Right to purchase one one-hundreth
of a share of a new  series of  Preferred  Stock for each  outstanding  share of
SciClone  Common  Stock  held of record at the close of  business  on August 15,
1997.

The Rights, which will initially trade with the Common Stock, become exercisable
at $30.00 per Right, only after a person or group acquires 15 percent or more of
SciClone's  Common Stock in a transaction not approved by the Board or announces
an unapproved  tender offer which could result in such person or group owning 15
percent or more of the Common Stock. Generally, following such events the Rights
permit SciClone shareholders other than the acquiror to purchase SciClone Common
Stock having a



<PAGE>


SciClone Pharmaceuticals Adopts Shareholder Rights Plan
July 29, 1997
Page 2 of 2


market value of twice the  exercise  price of the Rights.  In  addition,  in the
event of certain business combinations, the Rights permit purchase of the Common
Stock of an acquiror at a 50 percent discount.

The  Rights  expire on August 15,  2007.  The  Rights  distribution  will not be
taxable to Shareholders  and will be payable to shareholders of record on August
15, 1997.

SciClone  Pharmaceuticals,  Inc. is an international  biopharmaceutical  company
involved   in   the   acquisition,    development   and   commercialization   of
pharmaceuticals worldwide. SciClone focuses on specialist-oriented products that
address  significantly  unmet chronic and life  threatening  diseases  including
hepatitis B and C, cancer, immune system disorders and cystic fibrosis.

Press   releases   and   additional    corporate    information   for   SciClone
Pharmaceuticals, Inc. are available on the Internet at www.sciclone.com.


                                      ####




                   [SciClone Pharmaceuticals, Inc. Letterhead]

                                 August 26, 1997


Dear Fellow Shareholders:

     The Board of Directors of SciClone  Pharmaceuticals, Inc.  ("SciClone") has
adopted a Shareholder  Rights Plan (the  "Plan").  We have enclosed a summary of
the principal terms of the Plan and we urge you to read it carefully.

     The Plan is designed to protect your  interests in the event the Company is
confronted with an unsolicited  takeover attempt.  The Plan contains  provisions
designed to deter unsolicited offers that do not treat all Shareholders equally,
acquisitions of significant blocks of shares in the open market without paying a
control premium and other coercive takeover tactics which may impair the Board's
ability to represent  your  interests  fully.  These tactics  unfairly  pressure
Shareholders,  squeeze them out of their investment without giving them any real
choice and deprive  them of the full value of their  Common  Stock.  The Plan is
similar to plans adopted by over 1,500 publicly held companies,  and was adopted
by the Board of  Directors  after  consultation  with the  Company's  investment
bankers and counsel.  We consider the Plan to be an effective tool in protecting
your equity investment, while not preventing a fair acquisition offer.

     The Plan is not  intended to prevent a takeover of the Company and will not
do so. It is designed to deal with unilateral actions by a hostile acquiror that
are  calculated  to  deprive  the Board and the  Company's  Shareholders  of the
ability  to take  actions  to  maximize  Shareholder  value.  The Plan  does not
preclude the Board from considering or accepting an offer to acquire all or part
of the Company,  if the Board  believes the offer to be in the best interests of
the  Company's  Shareholders.  The Plan has not been  adopted in response to any
known effort to acquire control of the Company.

     The  adoption  of the Plan does not weaken the  financial  strength  of the
Company or interfere with its business plans.  The issuance of the Rights has no
dilutive effect,  will not affect reported earnings per share, is not taxable to
the  Company  or you,  and will not  change  the way in which  you can trade the
Company's stock. As explained in detail in the enclosed summary of the Plan, the
Rights can only be exercised  if and when a situation  arises which the Plan was
created to address.

     You are not  required  to take  any  action  at this  time.  We  recommend,
however,  that you read the enclosed  summary of the many  features of the Plan,
and retain the summary with your SciClone stock certificates or records.  If you
should  require  further  information,  a copy of the Plan is available from the
Company's Secretary.

     The Board  believes  that the  adoption of the Plan  represents a sound and
reasonable means of preserving the long-term value of the Company for all of its
Shareholders. We want to thank all Shareholders for their continued support.


                                                   Very truly yours,

                                                   /s/ Donald R. Sellers
                                                   -----------------------------
                                                   Donald R. Sellers
                                                   President and Chief Executive
                                                   Officer


<PAGE>


UNDER CERTAIN CIRCUMSTANCES, AS SET FORTH IN THE RIGHTS AGREEMENT, RIGHTS ISSUED
TO,  BENEFICIALLY  OWNED BY OR  TRANSFERRED  TO ANY  PERSON WHO IS OR BECOMES AN
ACQUIRING  PERSON (AS  DEFINED  IN THE  RIGHTS  AGREEMENT)  OR AN  ASSOCIATE  OR
AFFILIATE (AS DEFINED IN THE RIGHTS AGREEMENT)  THEREOF AND CERTAIN  TRANSFEREES
THEREOF WILL BE NULL AND VOID AND WILL NO LONGER BE TRANSFERABLE.


                         SCICLONE PHARMACEUTICALS, INC.

                               Summary of Terms of
                                Rights Agreement


Nature of Right:         When exercisable, each Right (a "Right") will initially
                         entitle the holder to purchase one  one-hundredth  of a
                         share of Series B Preferred Stock  ("Preferred  Stock")
                         of SciClone Pharmaceutical, Inc. (the "Company").

Means of Distribution:   The  Rights  will  be  distributed  to  holders  of the
                         Company's outstanding Common Stock as a dividend of one
                         Right for each share of Common  Stock.  The Rights will
                         also be  attached  to all  future  issuances  of Common
                         Stock  prior  to  the  Distribution  Date  (as  defined
                         below).

Exercisability:          Rights  become  exercisable  on the earlier of: (i) the
                         tenth day following the date of public  announcement by
                         the  Company or by any  person or group (an  "Acquiring
                         Person")   that  such  person  or  group  has  acquired
                         beneficial  ownership  of 15% or more of the  Company's
                         outstanding  Common Stock,  or (ii) the tenth  business
                         day  (unless  extended by the Board prior to the time a
                         person  becomes  an  Acquiring  Person)  following  the
                         commencement,   or  announcement  of  an  intention  to
                         commence,  by  any  person  or  group  of a  tender  or
                         exchange offer which would result in such person owning
                         15% or  more of the  outstanding  Common  Stock  of the
                         Company  (the  earlier of such dates is  referred to as
                         the  "Distribution  Date"),  provided that an Acquiring
                         Person does not include an Exempt  Person (as such term
                         is defined in the Rights Agreement).  Rights will trade
                         separately from the Common Stock once the Rights become
                         exercisable.

Exercise Price:          $30 per share, which is the amount that in the judgment
                         of the  Board of  Directors  represents  the  long-term
                         value of the  Common  Stock over the term of the Rights
                         Agreement (the "Exercise Price").

Term:                    The  Rights  will  expire  upon the  earlier of (i) ten
                         years after the date of  issuance,  or July 24, 2007 or
                         (ii) redemption or exchange by the Company as described
                         below.

Redemption of Rights:    Rights are  redeemable  at a price of $0.001 per Right,
                         by the vote of the Company's Board of Directors, at any
                         time until the  occurrence of a Flip-In Event  (defined
                         below).

Preferred Stock:         The Preferred  Stock  purchasable  upon exercise of the
                         Rights  will be  nonredeemable  and junior to any other
                         series of preferred stock the

                                       1

<PAGE>


                         Company  may issue  (unless  otherwise  provided in the
                         terms of such other  series).  Each share of  Preferred
                         Stock  will have a  preferential  cumulative  quarterly
                         dividend  in an  amount  equal  to the  greater  of (a)
                         $75.00 or b) 100 times the  dividend  declared  on each
                         share of Common Stock. In the event of liquidation, the
                         holders of  Preferred  Stock will  receive a  preferred
                         liquidation  payment equal to the greater of (a) $3,000
                         per  share,  plus  accrued  dividends  to the  date  of
                         distribution whether or not earned or declared,  or (b)
                         an amount  per share  equal to 100 times the  aggregate
                         payment to be  distributed  per share of Common  Stock.
                         Each  share of  Preferred  Stock  will have 100  votes,
                         voting together with the shares of Common Stock. In the
                         event of any merger, consolidation or other transaction
                         in which  shares of Common Stock are  exchanged  for or
                         changed  into  other  securities,   cash  and/or  other
                         property,   each  share  of  Preferred  Stock  will  be
                         entitled  to  receive  100 times the amount and type of
                         consideration  received per share of Common Stock.  The
                         rights  of  the   Preferred   Stock  as  to  dividends,
                         liquidation and voting, and in the event of mergers and
                         consolidations,     are    protected    by    customary
                         anti-dilution   provisions.   Fractional   shares   (in
                         integral  multiples of one  one-hundredth) of Preferred
                         Stock will be issuable;  however, the Company may elect
                         to  distribute  depository  receipts  in  lieu  of such
                         fractional  shares.  In lieu of fractional shares other
                         than fractions that are multiples of one  one-hundredth
                         of a share, an adjustment in cash will be made based on
                         the  market  price of the  Preferred  Stock on the last
                         trading date prior to the date of exercise.  Because of
                         the   nature  of  the   Preferred   Stock's   dividend,
                         liquidation  and  voting  rights,   the  value  of  one
                         one-hundredth of a share of Preferred Stock purchasable
                         upon  exercise  of each Right  should  approximate  the
                         value of one share of Common Stock.

Rights in Event of       In the  event  that  an  Acquiring  Person  engages  in
Self-Dealing             certain self-dealing  transactions with the Company, or
Transaction or           a Person becomes the beneficial owner of 15% or more of
Acquisition of           the  outstanding  Common Stock  ("Flip-In  Events"),  a
Substantial Amount       holder a Right  thereafter  has the right to  purchase,
of Common Stock:         upon payment of the then  current  Exercise  Price,  in
                         lieu of one one-hundredth of a share of Preferred Stock
                         per outstanding  Right, such number of shares of Common
                         Stock  having  a  market  value  at  the  time  of  the
                         transaction  equal to the  Exercise  Price  divided  by
                         one-half  the Current  Market  Price (as defined in the
                         Rights Agreement) of the Common Stock.  Notwithstanding
                         the foregoing,  Rights held by the Acquiring  Person or
                         any   Associate   or   Affiliate   thereof  or  certain
                         transferees  will be null  and void  and no  longer  be
                         transferable.

                         Self-dealing  transactions  are  defined  to  include a
                         consolidation,   merger  or  other  combination  of  an
                         Acquiring  Person with the Company in which the Company
                         is the surviving corporation, the transfer of assets to
                         the Company in exchange for  securities of the Company,
                         or otherwise  obtain  securities of the Company  (other
                         than in a pro rata  distribution to all  shareholders),
                         the  sale,  purchase,  transfer,  distribution,  lease,
                         mortgage,  pledge  or  acquisition  of  assets  by  the
                         Acquiring  Person to, from or with the Company on other
                         than  an  arm's  length  basis,   compensation   to  an
                         Acquiring   Person  for   services   (other   than  for
                         employment  as  a  regular  or  part-time  employee  or
                         director on a basis  consistent with the Company's past

                                       2

<PAGE>


                         practice),  a loan  or  provision  of  other  financial
                         assistance (except proportionately as a shareholder) to
                         an  Acquiring  Person or the  licensing,  sale or other
                         transfer of proprietary technology or know-how from the
                         Company to the  Acquiring  Person on terms not approved
                         by  the  Board  of  Directors  or  a  reclassification,
                         recapitalization  or other  transaction with the effect
                         of increasing  by more than 1% the  Acquiring  Person's
                         proportionate  share of any class of  securities of the
                         Company.

Rights in Event of       If,  following the occurrence of a Flip-In  Event,  the
Business Combination:    Company is  acquired by any person in a merger or other
                         business  combination  transaction  in which the Common
                         Stock  is  exchanged  or  converted  or  in  which  the
                         corporation is not the surviving corporation, or 50% or
                         more of its  assets or  earnings  power are sold to any
                         person, each holder of a Right (other than an Acquiring
                         Person,  or  Affiliates or  Associates  thereof)  shall
                         thereafter have the right to purchase,  upon payment of
                         the then current Exercise Price,  such number of shares
                         of  common  stock  of the  acquiring  company  having a
                         current  market  value  equal  to  the  Exercise  Price
                         divided by one-half  the Current  Market  Price of such
                         common stock.

Exchange Option:         In the  event  (i)  any  person  or  group  becomes  an
                         Acquiring   Person   or  (ii)  any  of  the   types  of
                         transactions,  acquisitions  or other events  described
                         above as self-dealing  transactions occur, and prior to
                         the  acquisition by such person or group of 50% or more
                         of the  outstanding  shares of Common Stock,  the Board
                         may  require  all or  any  portion  of the  outstanding
                         Rights  (other  than  Rights  owned  by such  Acquiring
                         Person  which have  become  void) to be  exchanged  for
                         Common Stock on a pro rata basis,  at an exchange ratio
                         of one share of Common Stock or one  one-hundredth of a
                         share of  Preferred  Stock (or of a share of a class or
                         series  of  the   Company's   Preferred   Stock  having
                         equivalent  rights,  preferences and  privileges),  per
                         Right (subject to adjustment).

Fractional Shares:       No  fractional  shares of Common  Stock  will be issued
                         upon  exercise of the Rights and,  in lieu  thereof,  a
                         payment  in cash  will be  made to the  holder  of such
                         Rights equal to the same fraction of the current market
                         value of a share of Common Stock.

Adjustment:              The Exercise Price payable, and the number of shares of
                         Preferred   Stock  or  other   securities  or  property
                         issuable,  upon  exercise  of the Rights are subject to
                         adjustment from time to time to prevent dilution (i) in
                         the event of a stock  dividend  on,  or a  subdivision,
                         combination or reclassification of the Preferred Stock,
                         (ii) upon the grant to holders of the  Preferred  Stock
                         of  certain   rights  or  warrants  to  subscribe   for
                         Preferred Stock or convertible  securities at less than
                         the  current  market  price of the  Preferred  Stock or
                         (iii) upon the distribution to holders of the Preferred
                         Stock of evidences of indebtedness or assets (excluding
                         dividends   payable   in   Preferred   Stock)   or   of
                         subscription  rights  or  warrants  (other  than  those
                         referred  to above).  The  number of Rights  associated
                         with each  share of  Common  Stock is also  subject  to
                         adjustment  in the event of a stock split of the Common
                         Stock or a stock  dividend on the Common Stock  payable
                         in  Common  Stock or  subdivisions,  consolidations  or
                         combinations of the Common Stock

                                       3

<PAGE>


                         occurring,  in any such case, prior to the Distribution
                         Date.

Rights as Shareholder:   The Rights themselves do not entitle the holder thereof
                         to any  rights  as a  shareholder,  including,  without
                         limitation, voting rights or to receive dividends.

Amendment of Rights:     Until the Rights become nonredeemable, the Company may,
                         except with respect to the redemption price,  amend the
                         Agreement  in  any  manner.  After  the  Rights  become
                         nonredeemable,  the Company may amend the  Agreement to
                         cure  any  ambiguity,  to  correct  or  supplement  any
                         provision which may be defective or  inconsistent  with
                         any other  provisions,  to shorten or lengthen any time
                         period  under  the  Rights  Agreement,  or to change or
                         supplement  any provision in any manner the Company may
                         deem  necessary  or  desirable,  provided  that no such
                         amendment  may  adversely  affect the  interests of the
                         holders of the Rights (other than the Acquiring  Person
                         or its Affiliates or Associates) or cause the Rights to
                         again be redeemable or the Agreement to again be freely
                         amendable.



     A copy of the Rights  Agreement  is  available,  free of  charge,  from the
     Company,  901 Mariner's Island  Boulevard,  San Mateo,  California,  94404,
     Attention: Secretary. This summary description of the Rights Agreement does
     not purport to be complete and is qualified in its entirety by reference to
     the Rights  Agreement,  as amended from time to time, which is incorporated
     in this summary description by reference.

                                       4



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