Document:

EXHIBIT # 4.40

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. DB1

                   WARRANT TO PURCHASE SHARES OF COMMON STOCK

                      WARRANT TO PURCHASE 1,100,000 SHARES
                   (SUBJECT TO ADJUSTMENT AS SET FORTH HEREIN)

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

                           ISSUE DATE: AUGUST 20, 2003

        VOID AFTER 3:00 P.M., CENTRAL TIME, ON THE SECOND ANNIVERSARY OF
                                 THE ISSUE DATE

          THIS CERTIFIES THAT DAN BURNS, P.O. Box 1086, Del Mar, California,
92014-1086 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. As consideration for this Warrant, the Warrant holder agrees to
forgive all outstanding indebtedness of the Company to the Warrant holder.

          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.

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          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."  Immediate

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

          "Expiration Date." The second 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.

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

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

<PAGE>

          "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
<PAGE>

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
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:
<PAGE>

               (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 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 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,
               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 (d) 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.

               (c) 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(c)) are not required to be made
               immediately shall be carried forward and taken into account in
               any subsequent adjustment.

<PAGE>

               (d) 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.

               (e) 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.

               (f) 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.

               (g) 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

<PAGE>

               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 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 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.

<PAGE>

          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
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;

<PAGE>

               (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 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

          As soon as an increase in the number of authorized shares is approved
by the stockholders of the Company, the Company shall at all times thereafter
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
<PAGE>

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
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.

<PAGE>

          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.

          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.

<PAGE>

          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
800, Chicago, Illinois 60610, Attention: President.

     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.

<PAGE>

          (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.

          (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:  _________________________
                                        Peter P. Gombrich
                                        Chief Executive Officer

<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.EXHIBIT D

                                 EXHIBIT # 4.41

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. DB2

                   WARRANT TO PURCHASE SHARES OF COMMON STOCK

                       WARRANT TO PURCHASE 935,000 SHARES

                         EXERCISE PRICE $0.20 PER SHARE
                  (SUBJECT TO ADJUSTMENT AS SET FORTH HEREIN)]

                         ISSUE DATE: SEPTEMBER 16, 2003
       VOID AFTER 3:00 P.M., CENTRAL TIME, ON THE FIFTH ANNIVERSARY OF THE
                                   ISSUE DATE

          THIS CERTIFIES THAT Dan Burns, PO Box 1086, Del Mar, CA 92014 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.

<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 16, 2003.

          "Exercise Price." [$0.20] 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)

                                      D-4
<PAGE>

          subdivide its outstanding Common Stock, (iii) combine its outstanding
          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 for securities or other property deliverable upon the

                                      D-8
<PAGE>

          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

                                      D-9
<PAGE>

to be made; and no disposition shall be made if the Company has notified the
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: _____________________________
                                        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

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