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        <PersonNm>Alan W Kornberg Esq</PersonNm>
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        <PersonNm>Edward J Benz Jr MD</PersonNm>
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        <PersonNm>Thomas A Boyd PhD</PersonNm>
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        <PersonNm>Janis L Coates PhD</PersonNm>
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        <PersonNm>Claudine Lurvey</PersonNm>
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        <PersonNm>Jerilyn M Bowers</PersonNm>
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        <PersonNm>Iain A Drummond PhD</PersonNm>
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        <PersonNm>Jane E Disney</PersonNm>
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        <ExplanationTxt>The Organization and/or its employees participate in various professional, scientific, and research associations and membership groups, including the Citizen Science Association, Society for Human Resources, the Society for Developmental Biology, and the Bioscience Association of Maine, among others. MDI Biological Laboratory's memberships with these organizations allows it to gain access to valuable benefits and resources that advance its charitable mission. However, a portion of the dues paid to these associations was available for lobbying activity by the associations on behalf of their members to advance scientific goals. The Organization estimates that during this tax year, of all dues and fees paid across all memberships, approximately $2,118 was available for lobbying purposes. The Organization also paid $2,500 to the Invest in Maine's Future campaign to advance a state bond which was related to the Organization's charitable mission. This amount is included within the $4,618 total reported on this Schedule C, Part II-B, Line 1f. Additionally, a nominal amount of employee staff time was devoted to meeting with members of the Maine Legislature for the purpose of discussing matters of scientific importance that directly relate to or impact the Organization's charitable mission. The Organization estimates that approximately $1,005 of employee expenses were paid during this tax year so that employees of the Organization could meet with and discuss such issues with political representatives in Augusta, Maine.</ExplanationTxt>
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        <ExplanationTxt>The Mount Desert Island Biological Labs provides grants, awards, and scholarships to multiple organizations and individuals annually. Such awards are intrinsic to our exempt mission to advance scientific research and train the next generation of scientists, physicians and entrepreneurs. During the tax year covered by this Form 990, the Organization paid $65,740 in Graduate Student Assistantships to six graduate students who were studying at the Hannover Medical School in Germany. These grants directly furthered the Organization's charitable mission to promote and advance scientific research and education. The Organization does not otherwise maintain property, investments, employees, or engage in other activities outside of the United States. The Organization adopts and maintains strict and thorough recordkeeping practices for all grants and awards, so that all expended funds are used as intended and in alignment with the mission of the Organization. Grants and awards are also subject to the review and oversight of top management and finance personnel. Lastly, as certain grants paid by the Organization are funded through Federal Grant Subaward Agreements, the Organization also routinely and fully complies with Federal Award Audit requirements, to ensure that all records accounting for such subawards are timely, accurate, and complete. No federal funds were used to support these students.</ExplanationTxt>
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        <ExplanationTxt>During the period covered by this Form 990, the Organization engaged Bentz, Whaley, Flessner and Associates, Inc (BWF) to provide fundraising consulting services. BWF did not solicit contributions on behalf of the Organization, maintain or oversee any fundraising events, or engage or participate in any of the Organization's program services. Rather, the Organization independently utilized the data and insight provided by BWF to improve the Organization's own fundraising capabilities and expertise. The services provided by BWF were valuable and improved the Organization's ability to fundraise on its own, but no gross receipts or donations received by the Organization can be connected to the services provided by BWF, nor did BWF solicit any funds on the Organization's behalf. Accordingly, $0 is reported on this Form 990, Schedule G, Part I, Column iv. Additionally, while all boxes checked on this Schedule G, Part I, Line 1 indicate fundraising activities engaged in by the Laboratory, BWF did not contribute directly to any of those efforts.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Mount Desert Island Biological Labs provides grants, awards, and scholarships to multiple organizations and individuals annually. Such awards are intrinsic to our exempt mission to advance scientific research and train the next generation of scientists, physicians and entrepreneurs. In part through our grants and awards programs, funded through federal grants and institutional endowment funds, The MDI Biological Laboratory provides biomedical training to more than 600 students each year. Our training programs emphasize hands-on experiences, problem solving, communication and partnership building. We offer opportunities to students and professionals at all levels, including middle and high school students, undergraduates, graduate students, and post-doctoral research fellows, as well as practicing physicians, veterinarians, scientists, teachers, and members of the public from all backgrounds. Additionally, we offer hands-on residential research fellowships to undergraduate, graduate and post-doctoral fellows. Participants join our active, global scientific community and have access to state-of-the-art research laboratories and core facilities, support staff and our inspirational coastal setting. Outside of supporting the education of future scientific leaders, we also provide subawards to other collaborating scientific and research institutions through several grants including the Maine IDeA Network of Biomedical Research Excellence (INBRE). As the founder and leader of the Maine INBRE program, a collaborative network of 17 Maine educational and research institutions sponsored by the National Institute of General Medical Sciences (NIGMS) of the National Institutes of Health (NIH), the MDI Biological Laboratory issues subawards to collaborating partners. The Maine INBRE strengthens Maine's capacity to conduct competitive biomedical research by focusing on three key areas: 1. Creating a technically skilled workforce in Maine through biomedical research training for undergraduates. 2. Providing research support to young faculty to increase their competitiveness for federal (NIH) biomedical research grants. 3. Improving the research infrastructure available to INBRE institutions through a collaborative network of core facilities with state-of-the-art equipment. The program provides research support and core facilities to junior faculty and creates research and training opportunities for undergraduate and graduate students. It serves as a pipeline for students interested in biomedical research careers and builds the scientific and technical capacity of Maine's workforce. The Organization adopts and maintains strict and thorough recordkeeping practices for all grants and awards, so that all expended funds are used as intended and in alignment with the mission of the Organization. Grants and awards are also subject to the review and oversight of top management and finance personnel. Lastly, as certain grants paid by the Organization are funded through Federal Grant Subaward Agreements, the Organization also routinely and fully complies with Federal Award Audit requirements, to ensure that all records accounting for such subawards are timely, accurate, and complete.</ExplanationTxt>
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        <ExplanationTxt>The President lives in the President's Cottage located on the Mount Desert Island Biological Laboratory campus. The Organization estimates the annual value of this housing to be approximately $27,720. Due to the nature of the President's responsibilities, including the need for the President to be on campus and accessible at nearly all hours on a daily basis, this lodging has been deemed by the Organization to be furnished for the convenience of Mount Desert Island Biological Laboratory, and that such a living arrangement is required for the President's position. Accordingly, the value of the housing allowance has not been included in the President's taxable compensation, though it is included in the total amount of non-taxable benefits reported on this Schedule J, Part II, Column D. Additionally, Mount Desert Island Biological Laboratory maintains membership in a private club to foster business relationships and increase awareness of the mission of the institution. During this tax year the institution paid $2,305 in fees and dues to this club.</ExplanationTxt>
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    <IRS990ScheduleL documentId="RetDoc1042800001">
      <LoansBtwnOrgInterestedPrsnGrp>
        <BusinessName>
          <BusinessNameLine1Txt>Revidia Therapeutics (fka Nova Biosciences Inc)</BusinessNameLine1Txt>
        </BusinessName>
        <RelationshipWithOrgTxt>Former President - 35% entity</RelationshipWithOrgTxt>
        <LoanPurposeTxt>Legal Expenses</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>120012</OriginalPrincipalAmt>
        <BalanceDueAmt>0</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>5</ContributionCnt>
        <NoncashContributionsRptF990Amt>2455681</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Gift Date Value</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>1</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 32b:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization engages its third-party financial advisors to assist in managing and processing non-cash gifts of stock when received.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Board members Elizabeth R. Myers, Ph.D. and Margaret A. Myers, M.D. share a family relationship.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>During the period covered by this Form 990, the Organization revised its mission statement to read as follows: "We improve human and environmental health by discovering basic mechanisms of regeneration and aging, translating our discoveries for the benefit of society, and developing the next generation of scientific leaders."</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization shall have three classes of members: 1. Regular Members 2. Associate Members, and 3. Honorary Members Regular Members shall be scientists with advanced degrees who have worked at the Organization for at least one season or such other persons as the Trustees may elect. Associate Members are individuals who are interested in the aims and purposes of the Organization but are not Regular or Honorary Members. An Honorary Member is an individual who is either a distinguished scientist who has had some association with the Organization or is an individual who has contributed significantly to the welfare of the Organization and who is elected an Honorary Member by the Board of Trustees.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Proposed nominations for election to the Board of Governing Trustees may be submitted to the Nominating Committee for research and consideration by any member of the Board of Governing Trustees and by any member of the Organization. Proposed nominations shall be submitted in writing with information required by the Nominating Committee. The Nominating Committee shall present its nominees for election as Governing Trustees in the notice of the annual meeting of Members. No other nominations shall be permitted. Election at the annual meeting shall be by majority vote of the Members of the Organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 is prepared with the assistance of an independent CPA firm. The CPA firm coordinates with key officers and finance personnel of the Organization to prepare and review a draft of the Form 990 prior to its filing with the IRS. This draft of the Form 990 is reviewed by senior management and the chair of the governance committee, and made available for full board review prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The board of trustees are asked to review the conflict of interest policy and disclose any potential conflicts annually, the organization monitors the conflict of interest issues for scientists at the time of hire as well as for scientists and other key people on NIH grants at key times during individual grant cycles. The chairman of the board has charged the Governance Committee with reviewing the written policy on an annual basis and ensuring that each member of the board reads and signs the policy annually. Should they arise, potential conflicts of interest are addressed by the board. Completion of conflict of interest forms and related matters are a formal agenda item for at least one board meeting annually.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The President's conditions for term of service as well as salary and other compensation is determined by the Board of the Trustees. In this process, the Organization uses comparability data from other non-profits in its operating area and in same field of scientific research to determine reasonable and market rate compensation and benefits to be offered to the Organization's officers and key employees.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization provides copies of its Form 990 tax returns and audited financial statements on its website at the following address: https://mdibl.org/about/our-location-culture/ quick-facts-resources/ Other documents, such as various governance statements, bylaws, and the Organization's conflict of interest policy, are available upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>Change in fair value of interest rate swap -160,903.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>The audit was subject to the review and oversight of the Organization's Executive Director, finance and audit committees, and key financial and business personnel within the Organization. Additionally, the Organization's audited financial statements and Form 990 are subject to review by the Organization's independent Board of Trustees prior to their issuance. The audit process has not changed from the prior year.</ExplanationTxt>
      </SupplementalInformationDetail>
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