<PAGE>

                                                                       EXHIBIT D

                                 EXHIBIT # 4.43

THIS  WARRANT AND THE  UNDERLYING  SHARES OF COMMON  STOCK  REPRESENTED  BY THIS
CERTIFICATE  HAVE NOT BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF 1933 (THE
"ACT"),  AND ARE  "RESTRICTED  SECURITIES"  AS THAT TERM IS  DEFINED IN RULE 144
UNDER THE ACT.  THE  SECURITIES  MAY NOT BE OFFERED FOR SALE,  SOLD OR OTHERWISE
TRANSFERRED  EXCEPT  PURSUANT TO AN EFFECTIVE  REGISTRATION  STATEMENT UNDER THE
ACT,  OR  PURSUANT  TO  AN  EXEMPTION  FROM  REGISTRATION  UNDER  THE  ACT,  THE
AVAILABILITY  OF WHICH IS TO BE  ESTABLISHED  TO THE  SATISFACTION  OF MOLECULAR
DIAGNOSTICS, INC.

                                                                 Warrant No. RJ1




                   WARRANT TO PURCHASE SHARES OF COMMON STOCK


                       WARRANT TO PURCHASE 500,000 SHARES


                         EXERCISE PRICE $0.17 PER SHARE
                  (SUBJECT TO ADJUSTMENT AS SET FORTH HEREIN)]



                         ISSUE DATE: SEPTEMBER 02, 2003
 VOID AFTER 3:00 P.M., CENTRAL TIME, ON THE FIFTH ANNIVERSARY OF THE ISSUE DATE


     THIS CERTIFIES THAT Reid Jilek, 200 Harbor Drive,  Suite # 1402, San Diego,
CA 92101 is entitled to purchase from  Molecular  Diagnostics,  Inc., a Delaware
corporation (hereinafter called the "Company") with its principal office located
at 414 North Orleans  Street,  Suite 800,  Chicago,  Illinois 60610, at any time
after the Exercise Date (as defined below),  but before 3:00 P.M., Central Time,
on the  Expiration  Date (as defined  below),  at the Exercise Price (as defined
below),  the number of shares (the  "Warrant  Shares") of the  Company's  common
stock,  par value  $0.001 per share (the "Common  Stock") set forth  above.  The
number of Shares  purchasable  upon  exercise of this  Warrant and the  Exercise
Price per Share shall be subject to adjustment from time to time as set forth in
Section 4 below.



                                      D-1
<PAGE>

         SECTION 1. DEFINITIONS

         The  following  terms used in this  Warrant  shall  have the  following
meanings (unless otherwise expressly provided herein):

         The "Act." The Securities Act of 1933, as amended.

         The "Commission." The Securities and Exchange Commission.

         The "Company." Molecular Diagnostics, Inc.

         "Common Stock." The Company's Common Stock, par value $0.001 per share.

         "Current Market Price." The Current Market Price shall be determined as
follows:

                  (a)  if  the  security  at  issue  is  listed  on  a  national
         securities  exchange or admitted to unlisted trading privileges on such
         an exchange or quoted on either the National Market System or the Small
         Cap Market of the automated  quotation  service  operated by The Nasdaq
         Stock  Market,  Inc.  ("Nasdaq"),  the current  value shall be the last
         reported  sale price of that security on such exchange or system on the
         day for which the Current  Market Price is to be  determined  or, if no
         such sale is made on such day,  the average of the highest  closing bid
         and lowest asked price for such day on such exchange or system; or

                  (b) if the  security  at issue is not so  listed  or quoted or
         admitted to unlisted trading privileges, the Current Market Value shall
         be the average of the last reported highest bid and lowest asked prices
         quoted on the Nasdaq  Electronic  Bulletin Board, or, if not so quoted,
         then by the National  Quotation  Bureau,  Inc. on the last business day
         prior  to  the  day  for  which  the  Current  Market  Price  is  to be
         determined; or

                  (c) if the  security  at issue is not so  listed  or quoted or
         admitted to unlisted  trading  privileges  and bid and asked prices are
         not  reported,  the current  market value shall be  determined  in such
         reasonable  manner as may be prescribed  from time to time by the Board
         of  Directors  of the  Company,  subject  to the  objection  procedures
         hereinafter described.

         "Exercise Date." September 02, 2003.

         "Exercise  Price."  [$0.17] per Share, as modified from time to time in
accordance with the provisions of this Warrant.

         "Expiration Date." The fifth anniversary of the Issue Date indicated on
the first page of this Warrant.

         "Holder" or "Warrantholder."  The person to whom this Warrant is issued
and any valid transferee thereof pursuant to Section 3.1 below.



                                      D-2
<PAGE>

         "NASD." The National Association of Securities Dealers, Inc.

         "Nasdaq." The automated  quotation  system operated by the Nasdaq Stock
Market, Inc.

         "Termination  of  Business."  Any sale,  lease or  exchange  of all, or
substantially  all, of the  Company's  assets or  business  or any  dissolution,
liquidation or winding up of the Company.

         "Warrant."  This Warrant and any other warrants  issued in substitution
for or  replacement  thereof,  including  those  evidenced by a  certificate  or
certificates originally issued or issued upon division,  exchange,  substitution
or transfer pursuant to this Warrant.

         "Warrant  Shares." The Common Stock  purchasable  upon exercise of this
Warrant  including  the Common  Stock  underlying  unexercised  portions of this
Warrant.

         SECTION 2. TERM OF WARRANTS; EXERCISE OF WARRANT

         2.1. Exercise of Warrant.

                  (a)  Subject to the terms of this  Warrant,  the Holder  shall
         have the right, at any time beginning on the Exercise Date but prior to
         3:00 p.m.,  Central Time, on the Expiration  Date, to purchase from the
         Company up to the number of fully paid and nonassessable Warrant Shares
         to which the Holder may at the time be entitled to purchase pursuant to
         this Warrant,  upon surrender to the Company,  at its principal office,
         of the Warrant to be exercised,  together with the purchase form on the
         reverse  thereof,  duly filled in and signed,  and upon  payment to the
         Company  of the  Exercise  Price for the  number of  Warrant  Shares in
         respect  of which the  Warrant is then  exercised,  but in no event for
         less than 100 Warrant  Shares  (unless  fewer than an  aggregate of 100
         Warrant Shares are then purchasable under all outstanding Warrants held
         by a Holder).

                  (b) In lieu of payment of the Exercise  Price,  the Holder may
         require the Company to convert this Warrant into shares of Common Stock
         (the "Conversion  Right") as provided for in this Section 2.1(b).  Upon
         exercise of the  Conversion  Right,  the Company  shall  deliver to the
         Holder  (without  payment by the Holder of any of the  Exercise  Price)
         that number of shares of Common Stock equal to the quotient obtained by
         dividing (x) the value of the Warrant at the time the Conversion  Right
         is exercised (determined by subtracting the aggregate Exercise Price in
         effect  immediately  prior to the exercise of the Conversion Right from
         the  aggregate  Current  Market Price for the Common Stock  immediately
         prior to the exercise of the Conversion Right by (y) the Current Market
         Price of the Common Stock.

         2.2. Payment of Exercise Price. Payment of the aggregate Exercise Price
may be made in cash or by check, or any combination thereof.

         2.3. Issuance of Shares.  Upon surrender of this Warrant and payment of
the applicable Exercise Price, the Company shall issue and cause to be delivered
with all  reasonable  dispatch to or upon the written order of the Holder and in
the name or names the Holder may designate,  a certificate or  certificates  for
the  number  of full  Warrant  Shares so  purchased  upon the  exercise  of this
Warrant, together with cash, as provided in Section 12 hereof, in respect of any

                                      D-3
<PAGE>

fraction  of a Warrant  Share  that  would  otherwise  have been  issuable  upon
exercise of this Warrant.

         2.4.  Status as Holder of Shares.  Upon  receipt of this Warrant by the
company  following any exercise by the Holder,  the Holder shall be deemed to be
the  holder  of  record  of  the  Warrant   Shares   issuable   upon   exercise,
notwithstanding  that the  transfer  books of the  Company may then be closed or
that certificates  representing the Warrant Shares may not have been prepared or
actually delivered to the Holder.

         SECTION 3. TRANSFERABILITY AND FORM OF WARRANT

         3.1. Limitation on Transfer. Any assignment or transfer of this Warrant
shall  be made by  presentation  and  surrender  hereof  to the  Company  at its
principal  office or the office of its transfer agent, if any,  accompanied by a
duly executed  Assignment  Form.  Upon the  presentation  and surrender of these
items to the  Company,  the  Company,  at its sole  expense,  shall  execute and
deliver  to the  transferee  or  transferees  of this  Warrant a new  Warrant or
Warrants,  in the name of the transferee or transferees  named in the Assignment
Form, and this Warrant shall at that time be canceled.

         3.2. Exchange of Certificate. This Warrant may be exchanged for another
Warrant or Warrants  entitling the  Warrantholder  to purchase a like  aggregate
number of Warrant  Shares as the Warrant or Warrants  surrendered  then entitled
the Warrantholder to purchase.  Any Warrantholder desiring to exchange a Warrant
shall make a request in writing  delivered to the Company,  and shall surrender,
properly  endorsed,  with  signatures  guaranteed,  the Warrant to be exchanged.
Thereupon,  the Company shall execute and deliver to the person entitled thereto
a new Warrant as requested.

         3.3.  Mutilated,  Lost, Stolen, or Destroyed  Certificate.  In case the
certificate  evidencing  this  Warrant  shall  be  mutilated,  lost,  stolen  or
destroyed,  the Company shall,  at the request of the  Warrantholder,  issue and
deliver in exchange and substitution for and upon  cancellation of the mutilated
certificate,  or in lieu of and substitution for the certificate lost, stolen or
destroyed,  a new  Warrant of like tenor  representing  an  equivalent  right or
interest,  but only upon receipt of evidence  satisfactory to the Company of the
loss, theft or destruction of the Warrant and a bond of indemnity, if requested,
also satisfactory in form and amount,  at the applicant's  cost.  Applicants for
substitute Warrants shall also comply with any other reasonable  regulations and
pay any other reasonable charges the Company may request.

         SECTION 4. ADJUSTMENT OF NUMBER OF SHARES

         The number and kind of securities purchasable upon the exercise of this
Warrant and the Exercise Price payable shall be subject to adjustment  from time
to time upon the happening of certain events, as follows:

         4.1.  Adjustments.  The number of Warrant Shares  purchasable  upon the
exercise of this Warrant and the Exercise  Price shall be subject to adjustments
as follows:

                  (a) In case the  Company  shall (i) pay a  dividend  in Common
         Stock or make a distribution to its stockholders in Common Stock,  (ii)
         subdivide its outstanding  Common Stock,  (iii) combine its outstanding

                                      D-4
<PAGE>

         Common Stock into a smaller  number of shares of Common Stock,  or (iv)
         issue by  classification  of its Common Stock other  securities  of the
         Company,  then in any of the  foregoing  cases,  the  number of Warrant
         Shares  purchasable  upon  exercise  of the Warrant  immediately  prior
         thereto shall be adjusted so that the  Warrantholder  shall be entitled
         to receive the kind and number of Warrant Shares or other securities of
         the  Company  that it would have owned or would have been  entitled  to
         receive  immediately after the happening of any of the events described
         above,  had  the  Warrant  been  exercised  immediately  prior  to  the
         happening  of the event or any record date with  respect  thereto.  Any
         adjustment  made  pursuant  to  this  subsection  4.1(a)  shall  become
         effective immediately after the effective date of the event retroactive
         to the record date, if any, for the event.

                  (b) If the Company shall issue rights,  options,  warrants, or
         convertible  securities  to all or  substantially  all  holders  of its
         Common  Stock,  without any charge to the  holders,  entitling  them to
         subscribe  for or  purchase  Common  Stock at a price per share that is
         lower at the record date  mentioned  below than the then Current Market
         Price,  the number of Warrant Shares  thereafter  purchasable  upon the
         exercise of this Warrant shall be determined by multiplying  the number
         of Warrant Shares theretofore purchasable upon exercise of this Warrant
         by a fraction,  the numerator of which shall be the number of shares of
         Common  Stock  outstanding  immediately  prior to the  issuance  of the
         rights, options, warrants or convertible securities, plus the number of
         additional shares of Common Stock offered for subscription or purchase,
         and the  denominator  of which  shall be the number of shares of Common
         Stock  outstanding  immediately  prior to the  issuance  of the rights,
         options, warrants, or convertible securities, plus the number of shares
         of Common Stock that the aggregate  offering  price of the total number
         of shares  offered would purchase at the Current Market Price as of the
         record date. The  adjustment  shall be made whenever  rights,  options,
         warrants,  or  convertible  securities  are  issued,  and shall  become
         effective  immediately  and  retroactively  to the record  date for the
         determination of stockholders entitled to receive the rights,  options,
         warrants, or convertible securities.

                  (c) If the Company shall  distribute  to all or  substantially
         all holders of its Common Stock evidences of its indebtedness or assets
         (excluding cash dividends or distributions  out of earnings) or rights,
         options,  warrants,  or convertible  securities containing the right to
         subscribe for or purchase Common Stock  (excluding those referred to in
         subsection  4.1(b)  above),  then in each case the  number  of  Warrant
         Shares  thereafter  purchasable upon the exercise of this Warrant shall
         be determined by multiplying  the number of Warrant Shares  theretofore
         purchasable  upon exercise of this Warrant by a fraction,  of which the
         numerator  shall  be the  then  Current  Market  Price  on the  date of
         distribution,  and the denominator of which shall be the Current Market
         Price on the date of distribution minus the then fair value (determined
         as provided in subparagraph  (e) below) of the portion of the assets or
         evidences of indebtedness so distributed or of the subscription rights,
         options,  warrants, or convertible  securities applicable to one share.
         The  adjustment  shall be made  whenever any  distribution  is made and
         shall become  effective on the date of distribution  retroactive to the
         record date for the  determination of stockholders  entitled to receive
         the distribution.



                                      D-5
<PAGE>

                  (d) No adjustment in the number of Warrant Shares  purchasable
         pursuant to this Warrant shall be required unless the adjustment  would
         require an  increase  or decrease of at least one percent in the number
         of Warrant  Shares then  purchasable  upon the exercise of this Warrant
         or, if this  Warrant  is not then  exercisable,  the  number of Warrant
         Shares  purchasable upon the exercise of this Warrant on the first date
         thereafter that this Warrant becomes  exercisable;  provided,  however,
         that any adjustments  which by reason of this  subsection  (4.1(d)) are
         not required to be made immediately  shall be carried forward and taken
         into account in any subsequent adjustment.

                  (e) Whenever the number of Warrant Shares purchasable upon the
         exercise of this Warrant is adjusted, as herein provided,  the Exercise
         Price  payable  upon  exercise  of this  Warrant  shall be  adjusted by
         multiplying the Exercise Price immediately prior to the adjustment by a
         fraction,  the numerator of which shall be the number of Warrant Shares
         purchasable upon the exercise of the Warrant  immediately  prior to the
         adjustment, and the denominator of which shall be the number of Warrant
         Shares so purchasable immediately thereafter.

                  (f) Whenever  the number of Warrant  Shares  purchasable  upon
         exercise of this  Warrant is adjusted as herein  provided,  the Company
         shall cause to be promptly mailed to the  Warrantholder  by first class
         mail,  postage  prepaid,  notice of the adjustment and a certificate of
         the chief financial  officer of the Company setting forth the number of
         Warrant Shares  purchasable upon the exercise of this Warrant after the
         adjustment, a brief statement of the facts requiring the adjustment and
         the computation by which the adjustment was made.

                  (g) For the  purpose of this  Section  4.1,  the term  "Common
         Stock" shall mean (i) the class of stock designated as the Common Stock
         of the Company as of the Issue Date of this Warrant,  or (ii) any other
         class of stock resulting from successive  changes or  reclassifications
         of the Common Stock consisting  solely of changes in par value, or from
         par value to no par value,  or from no par value to par  value.  If, at
         any time, as a result of an adjustment made pursuant to this Section 4,
         the  Warrantholder  shall become entitled to purchase any securities of
         the Company  other than Common Stock,  then (y) if the  Warrantholder's
         right to  purchase  is on any other  basis than that  available  to all
         holders of the  Company's  Common  Stock,  the Company  shall obtain an
         opinion of an  independent  investment  banking  firm valuing the other
         securities  and (z)  thereafter  the  number  of  other  securities  so
         purchasable   upon  exercise  of  this  Warrant  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 Warrant
         Shares contained in this Section 4.

                  (h) Upon the expiration of any rights,  options,  warrants, or
         conversion  privileges,  if they  shall  have not been  exercised,  the
         number of Warrant Shares purchasable upon exercise of the Warrants,  to
         the extent the Warrants have not then been exercised,  shall, upon such
         expiration,  be readjusted  and shall  thereafter be as they would have
         been had they been originally  adjusted (or had the original adjustment
         not been  required,  as the  case may be) on the  basis of (i) the fact
         that the only  shares of  Common  Stock so  issued  were the  shares of
         Common Stock, if any,  actually issued or sold upon the exercise of the

                                      D-6
<PAGE>

         rights, options,  warrants, or conversion privileges, and (ii) the fact
         that the shares of Common  Stock,  if any,  were issued or sold for the
         consideration  actually  received by the Company upon the exercise plus
         the  consideration,  if any,  actually  received by the Company for the
         issuance,  sale or grant  of all such  rights,  options,  warrants,  or
         conversion privileges whether or not exercised; provided, however, that
         no  readjustment  shall  have the  effect of  decreasing  the number of
         Warrant Shares  purchasable  upon exercise of this Warrant by an amount
         in excess of the amount of the adjustment  initially made in respect of
         the issuance,  sale,  or grant of such rights,  options,  warrants,  or
         conversion rights.

         4.2. No Adjustment for Dividends. Except as provided in Section 4.1, no
adjustment in respect of any dividends or distributions out of earnings shall be
made during the term, or upon the exercise, of this Warrant.

         4.3. No  Adjustment  in Certain  Cases.  No  adjustments  shall be made
pursuant to Section 4 hereof in connection with the issuance of the Common Stock
upon the conversion, if any, of the Company's 12% Secured Convertible Promissory
Notes or exercise of any warrants  issued to the holders  thereof in  connection
therewith.  No  adjustments  shall be made  pursuant  to  Section  4  hereof  in
connection  with the grant or exercise of presently  authorized  or  outstanding
options to  purchase,  or the  issuance  of shares of Common  Stock  under,  the
Company's director or employee benefit plan.

         4.4.   Preservation   of   Purchase   Rights   upon   Reclassification,
Consolidation,  etc. In case of any  consolidation of the Company with or merger
of the Company into another corporation, or in case of any sale or conveyance to
another  corporation of the property,  assets,  or business of the Company as an
entirety or substantially as an entirety, the Company or successor or purchasing
corporation,  as the case  may be,  shall  execute  with  the  Warrantholder  an
agreement that the Warrantholder shall have the right thereafter upon payment of
the Exercise Price in effect  immediately prior to the action to purchase,  upon
exercise of this Warrant, the kind and amount of shares and other securities and
property  that it would have owned or have been  entitled  to receive  after the
happening of the  consolidation,  merger,  sale, or conveyance  had this Warrant
been  exercised  immediately  prior  to the  action.  In the  event  of a merger
described in Section 368(a)(2)(E) of the Internal Revenue Code of 1986, in which
the Company is the surviving corporation, the right to purchase Shares under the
Warrants  shall  terminate on the date of such merger and thereupon the Warrants
shall become null and void, but only if the controlling  corporation shall agree
to substitute for the Warrants, its warrants which entitle the holder thereof to
purchase upon their exercise the kind and amount of shares and other  securities
and  property  which it would have  owned or been  entitled  to receive  had the
Warrants been exercised  immediately  prior to such merger.  Any such agreements
referred to in this Section 4.4 shall provide for adjustments, which shall be as
nearly  equivalent  as may be  practicable  to the  adjustments  provided for in
Section 4 hereof.  The provisions of this Section (4.4) shall similarly apply to
successive consolidations, mergers, sales, or conveyances.

         4.5.  Par Value of Shares of Common  Stock.  Before  taking  any action
which would cause an adjustment effectively reducing the portion of the Exercise
Price  allocable to each Share below the par value per share of the Common Stock
issuable  upon  exercise of the  Warrants,  the Company will take any  corporate
action which may, in the opinion of its counsel,  be necessary in order that the

                                      D-7
<PAGE>

Company may validly and legally issue fully paid and nonassessable  Common Stock
upon exercise of the Warrants.

         4.6.  Independent Public Accountants.  The Company may retain a firm of
independent public accountants of recognized national standing (which may be any
such firm regularly  employed by the Company) to make any  computation  required
under this Section 4, and a  certificate  signed by the firm shall be conclusive
evidence of the correctness of any computation made under this Section 4.

         4.7.  Treasury Stock.  For purposes of this Section 4, shares of Common
Stock owned or held at any relevant time by, or for the account of, the Company,
in its treasury or otherwise, shall not be deemed to be outstanding for purposes
of the calculations and adjustments described.

         SECTION 5. NOTICE TO HOLDERS

         If, prior to the  expiration of this Warrant  either by its terms or by
its exercise in full, any of the following shall occur:

                  (a) the  Company  shall  declare a dividend or  authorize  any
         other distribution on its Common Stock; or

                  (b)  the  Company   shall   authorize   the  granting  to  the
         shareholders of its Common Stock of rights to subscribe for or purchase
         any securities or any other similar rights; or

                  (c) any reclassification,  reorganization or similar change of
         the Common Stock, or any  consolidation  or merger to which the Company
         is a party, or the sale, lease, or exchange of any significant  portion
         of the assets of the Company; or

                  (d) the voluntary or involuntary  dissolution,  liquidation or
         winding up of the Company; or

                  (e) any  purchase,  retirement or redemption by the Company of
         its Common Stock;

then,  and in any such case,  the Company shall deliver to the Holder or Holders
written  notice thereof at least 30 days prior to the earliest  applicable  date
specified below with respect to which notice is to be given,  which notice shall
state the following:

                  (x) the date on which a record is to be taken for the  purpose
         of the dividend,  distribution or rights,  or, if a record is not to be
         taken,  the date as of which  the  holders  of  Common  Stock of record
         entitled to the dividend, distribution or rights will be determined;

                 (y) the date on which  any  reclassification,  reorganization,
         consolidation,   merger,  sale,  transfer,  dissolution,   liquidation,
         winding up or purchase,  retirement or redemption is expected to become
         effective,  and the date, if any, as of which the Company's  holders of
         Common Stock of record shall be entitled to exchange their Common Stock

                                      D-8
<PAGE>

         for securities or other property deliverable upon the reclassification,
         reorganization,  consolidation,  merger, sale,  transfer,  dissolution,
         liquidation, winding up, purchase, retirement or redemption; and

                  (z) if any matters  referred to in the  foregoing  clauses (x)
         and (y) are to be voted upon by holders of Common Stock, the date as of
         which the shareholders entitled to vote will be determined.

         SECTION 6. OFFICERS' CERTIFICATE

         Whenever the Exercise  Price or the aggregate  number of Warrant Shares
purchasable  pursuant  to this  Warrant  shall be  adjusted  as  required by the
provisions  of  Section  4 above,  the  Company  shall  promptly  file  with its
Secretary  or an  Assistant  Secretary  at its  principal  office,  and with its
transfer  agent,  if any, an  officers'  certificate  executed by the  Company's
President and Secretary or Assistant  Secretary,  describing  the adjustment and
setting forth, in reasonable  detail, the facts requiring the adjustment and the
basis for and calculation of the adjustment in accordance with the provisions of
this Warrant.  Each such  officers'  certificate  shall be made available to the
Holder or Holders of this Warrant for  inspection at all reasonable  times,  and
the  Company,  after  each  adjustment,  shall  promptly  deliver  a copy of the
officers'  certificate  relating to that  adjustment to the Holder or Holders of
this  Warrant.  The officers'  certificate  described in this Section 6 shall be
deemed  to be  conclusive  as to the  correctness  of the  adjustment  reflected
therein if, and only if, no Holder of this Warrant  delivers  written  notice to
the Company of an objection to the adjustment within 30 days after the officers'
certificate  is delivered to the Holder or Holders of this Warrant.  The Company
will make its books and records  available  for  inspection  and copying  during
normal  business hours by the Holder so as to permit a  determination  as to the
correctness  of the  adjustment.  Failure to prepare  or provide  the  officers'
certificate shall not modify the parties' rights hereunder.

         SECTION 7. RESERVATION OF WARRANT SHARES

         There has been reserved, and the Company shall at all times keep
reserved so long as this Warrant remains outstanding, out of its authorized and
unissued Common Stock, a number of shares of Common Stock sufficient to support
the full exercise hereof. Every transfer agent for the Common Stock and other
securities of the Company issuable upon the exercise of this Warrant will be
irrevocably authorized and directed at all times to reserve a number of
authorized shares and other securities as shall be requisite for such purpose.
The Company will keep a copy of this Warrant on file with every transfer agent
for the Common Stock and other securities of the Company issuable upon the
exercise of this Warrant. The Company will supply every transfer agent with duly
executed stock and other certificates, as appropriate, for such purpose and will
provide or otherwise make available any cash which may be payable as provided in
Section 11 hereof.

         SECTION 8. RESTRICTIONS ON TRANSFER.

         The  Warrantholder  agrees that prior to making any disposition of this
Warrant or the Warrant Shares,  the  Warrantholder  shall give written notice to
the Company describing  briefly the manner in which any proposed  disposition is
to be made;  and no  disposition  shall be made if the Company has  notified the

                                      D-9
<PAGE>

Warrantholder  that, in the opinion of counsel  reasonably  satisfactory  to the
Warrantholder,  a registration statement or other notification or post-effective
amendment thereto  (hereinafter  collectively a "Registration  Statement") under
the  Act is  required  with  respect  to  the  disposition  and no  Registration
Statement  has been  filed by the  Company  with,  and  declared  effective,  if
necessary, by, the Commission.

         SECTION 9. PAYMENT OF TAXES

         The Company will pay all documentary stamp taxes, if any,  attributable
to the initial issuance of this Warrant or the shares of Common Stock comprising
the Warrant Shares; provided,  however, the Company shall not be required to pay
any tax that may be  payable  in  respect of any  transfer  of the  Warrants  or
Warrant Shares.

         SECTION 10. TRANSFER TO COMPLY WITH THE SECURITIES ACT OF 1933

         This Warrant,  the Warrant Shares,  and any other securities  issued or
issuable upon exercise of this Warrant, may not be offered, sold or transferred,
in whole or in part, except in compliance with the Act, and except in compliance
with all applicable state  securities laws. The Company may cause  substantially
the following legends, or their equivalents, to be set forth on each certificate
representing  the Warrant Shares and any other security  issued or issuable upon
exercise of this Warrant,  not theretofore  distributed to the public or sold to
underwriters, as defined by the Act, for distribution to the public:

                  (a) "THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE HAVE NOT
         BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT  OF  1933  OR  ANY  STATE
         SECURITIES  LAWS  AND  MAY  NOT BE  SOLD,  EXCHANGED,  HYPOTHECATED  OR
         TRANSFERRED  IN ANY MANNER EXCEPT IN COMPLIANCE  WITH SUCH LAWS AND THE
         WARRANT PURSUANT TO WHICH THEY WERE ISSUED."

                  (b) Any legend required by applicable state securities laws.

         Any certificate  issued at any time in exchange or substitution for any
certificate   bearing  such  legends  (except  a  new  certificate  issued  upon
completion of a public distribution  pursuant to a registration  statement under
the  Securities  Act  of  1933,  as  amended  (the  "Act"),  or  the  securities
represented thereby) shall also bear the above legends unless, in the opinion of
the Company's  counsel,  the  securities  represented  thereby need no longer be
subject to such restrictions.

         SECTION 11. FRACTIONAL SHARES

         No fractional shares or scrip  representing  fractional shares shall be
issued upon the exercise of all or any part of this Warrant. With respect to any
fraction  of a share  of any  security  called  for upon  any  exercise  of this
Warrant,  the  Company  shall pay to the Holder an amount in money equal to that
fraction multiplied by the Current Market Price of that share.



                                      D-10
<PAGE>

         SECTION 12. NO RIGHTS AS STOCKHOLDER; NOTICES TO WARRANTHOLDER

         Nothing contained in this Warrant shall be construed as conferring upon
the Warrantholder or its transferees any rights as a stockholder of the Company,
including the right to vote, receive dividends,  consent or receive notices as a
stockholder  in  respect to any  meeting of  stockholders  for the  election  of
directors of the Company or any other matter.  The Company  covenants,  however,
that for so long as this  Warrant  is at least  partially  unexercised,  it will
furnish any Holder of this Warrant with copies of all reports and communications
furnished to the shareholders of the Company. In addition,  if at any time prior
to the expiration of the Warrants and prior to their  exercise,  any one or more
of the following events shall occur:

                  (a) any action which would require an  adjustment  pursuant to
         Section 4.1 (except subsections 4.1(e) and 4.1(h) or 4.4; or

                  (b) a dissolution,  liquidation,  or winding up of the Company
         (other than in connection with a consolidation,  merger, or sale of its
         property,  assets,  and business as an entirety or  substantially as an
         entirety) shall be proposed:

then the Company shall give notice in writing of the event to the Warrantholder,
as provided in Section 15 hereof, at least 20 days prior to the date fixed as a
record date or the date of closing the transfer books for the determination of
the stockholders entitled to any relevant dividend, distribution, subscription
rights or other rights or for the determination of stockholders entitled to vote
on such proposed dissolution, liquidation, or winding up. The notice shall
specify the record date or the date of closing the transfer books, as the case
may be. Failure to mail or receive notice or any defect therein shall not affect
the validity of any action taken with respect thereto.

         SECTION 13. CHARGES DUE UPON EXERCISE

         The Company shall pay any and all issue or transfer  taxes,  including,
but not limited to, all federal or state taxes, that may be payable with respect
to the transfer of this Warrant or the issue or delivery of Warrant  Shares upon
the exercise of this Warrant.

         SECTION 14. WARRANT SHARES TO BE FULLY PAID

         The Company  covenants  that all Warrant  Shares that may be issued and
delivered  to a Holder of this  Warrant  upon the  exercise of this  Warrant and
payment of the  Exercise  Price will be,  upon such  delivery,  validly and duly
issued, fully paid and nonassessable.

         SECTION 15. NOTICES

         Any  notice   pursuant  to  this   Warrant  by  the  Company  or  by  a
Warrantholder  or a holder of Shares  shall be in writing and shall be deemed to
have been duly given if delivered or mailed by certified  mail,  return  receipt
requested:

         (i) If to a  Warrantholder  or a holder  of  Shares,  addressed  to the
address set forth above.

         (ii) If to the Company  addressed  to it at 414 North  Orleans  Street,
Suite 510, Chicago, Illinois 60610, Attention: President.



                                      D-11
<PAGE>

         Each party may from time to time change the address to which notices to
it are to be delivered or mailed  hereunder by notice in accordance  herewith to
the other party.

         SECTION 16. MERGER OR CONSOLIDATION OF THE COMPANY

         The  Company  will not  merge  or  consolidate  with or into any  other
corporation  or  sell  all  or  substantially  all of its  property  to  another
corporation,  unless in  connection  therewith,  the Company  complies  with the
provisions of Section 4.4 hereof.

         SECTION 17. APPLICABLE LAW

         This Warrant shall be governed by and construed in accordance  with the
internal  laws (as  opposed  to  conflicts  of law  provisions)  of the State of
Illinois,  and courts located in Illinois shall have exclusive jurisdiction over
all disputes arising hereunder.

         SECTION 18. ACCEPTANCE OF TERMS; SUCCESSORS.

         By its  acceptance  of this Warrant,  the Holder  accepts and agrees to
comply  with all of the terms  and  provisions  hereof.  All the  covenants  and
provisions  of this  Warrant by or for the  benefit of the Company or the Holder
shall bind and inure to the benefit of their  respective  successors and assigns
hereunder.

         SECTION 19. MISCELLANEOUS PROVISIONS

         (a) Subject to the terms and conditions  contained herein, this Warrant
shall be  binding  on the  Company  and its  successors  and shall  inure to the
benefit of the original  Holder,  its  successors and assigns and all holders of
Warrant  Shares and the exercise of this Warrant in full shall not terminate the
provisions of this Warrant as it relates to holders of Warrant Shares.

         (b) If the Company fails to perform any of its  obligations  hereunder,
it shall be liable to the Holder for all damages,  costs and expenses  resulting
from the failure,  including, but not limited to, all reasonable attorney's fees
and disbursements.

         (c) This Warrant cannot be changed or terminated or any  performance or
condition waived in whole or in part except by an agreement in writing signed by
the party  against  whom  enforcement  of the change,  termination  or waiver is
sought;  provided,  however, that any provisions hereof may be amended,  waived,
discharged  or  terminated  upon the  written  consent  of the  Company  and the
Company.

         (d) If any  provision  of this  Warrant  shall  be held to be  invalid,
illegal or unenforceable, the provision shall be severed, enforced to the extent
possible,  or  modified  in  such a way  as to  make  it  enforceable,  and  the
invalidity,  illegality  or  unenforceability  shall not affect the remainder of
this Warrant.

         (e) The Company agrees to execute any further agreements,  conveyances,
certificates and other documents as may be reasonably requested by the Holder to
effectuate the intent and provisions of this Warrant.



                                      D-12
<PAGE>

         (f) Paragraph  headings used in this Warrant are for  convenience  only
and  shall  not be taken or  construed  to  define  or limit any of the terms or
provisions of this Warrant.  Unless  otherwise  provided,  or unless the context
shall  otherwise  require,  the use of the singular shall include the plural and
the use of any gender shall include all genders.

         IN WITNESS  WHEREOF,  the Company  has caused  this  Warrant to be duly
executed and issued as of the Issue Date first set forth above.



                                   MOLECULAR DIAGNOSTICS, INC.


                                   By: /s/ Peter P. Gombrich
                                      -----------------------------------------
                                      Peter P. Gombrich
                                      Chief Executive Officer



                                      D-13
<PAGE>

                                  PURCHASE FORM
                                  -------------

                                                           Dated _________, ____


         The undersigned  hereby  irrevocably elects to exercise this Warrant to
the extent of purchasing  ______________ shares of the Common Stock of Molecular
Diagnostics, Inc. and tenders payment of the exercise price thereof.

                     INSTRUCTIONS FOR REGISTRATION OF STOCK


 Name __________________________________________________________________________
                     (Please type or print in block letters)



 Address _______________________________________________________________________

.................................................................................

                                 ASSIGNMENT FORM
                                 ---------------

         FOR  VALUE  RECEIVED,  _________________,  hereby  sells,  assigns  and
transfers unto



Name     _______________________________________________________________________
                     (Please type or print in block letters)

Address  _______________________________________________________________________

the right to purchase  _________  shares Common Stock of Molecular  Diagnostics,
Inc. (the  "Company")  represented  by this Warrant and does hereby  irrevocably
constitute and appoint the Company as its attorney-in-fact, to transfer the same
on the books of the Company with full power of substitution in the premises.

         Signature                                           Dated
                  -----------------------------------------        -------------

NOTICE:  THE SIGNATURE ON THIS  ASSIGNMENT  MUST  CORRESPOND WITH THE NAME AS IT
APPEARS UPON THE FACE OF THIS WARRANT IN EVERY PARTICULAR, WITHOUT ALTERATION OR
ENLARGEMENT OR ANY CHANGE WHATEVER.

                                      D-14