Arthur O. Tzianabos, Ph.D., has served as the Chair of our Board of Directors from September 2024 and has served as a member of our Board of Directors since September 2018. Dr. Tzianabos also served as the Interim Executive Chair of our Board of Directors from March 2025 to October 2025. Dr. Tzianabos has served as the Chief Executive Officer of Lifordi Immunotherapeutics, a biopharmaceutical company, since June 2023. Dr. Tzianabos also serves as a Venture Partner at 5AM Ventures, where he has focused on life sciences investments since September 2022. Dr. Tzianabos serves on the Board of Directors of Q32 Bio Inc. (formerly Homology Medicines, Inc.), a genetic medicines company, where he previously served as President and Chief Executive Officer from April 2016 to September 2022. Prior to joining Homology Medicines, Inc., Dr. Tzianabos served as President and Chief Scientific Officer at OvaScience, Inc., a biotechnology company, from September 2013 to March 2016. Previously, Dr. Tzianabos served in various senior management positions at Shire Plc, a pharmaceutical company, and as a professor at Harvard Medical School. Dr. Tzianabos serves on the Development Board of the College of Life Sciences and Agriculture at the University of New Hampshire. Dr. Tzianabos previously served on the Board of Directors of Akouos, Inc., a public biotechnology company. Dr. Tzianabos holds a B.S. in Biology from Boston College and a Ph.D. in Microbiology from the University of New Hampshire. We believe that Dr. Tzianabos is qualified to serve on our Board of Directors because of his executive and clinical experience, as well as his extensive involvement in the biotechnology industry.