Scientists & Staff | National Institute of Environmental Health Sciences Skip Navigation Scientists & Staff Close the left navigation Add Genome Integrity & Structural Biology Laboratory Table of Contents Chief Deputy Chief Chromosome Stability Group DNA Repair & Nucleic Acid Enzymology Group William A. Beard, Ph.D. Staff Scientist Tel 984-287-3570 [email protected] Julie K. Horton, Ph.D. Staff Scientist Tel 984-287-3571 [email protected] DNA Replication Fidelity Group Genome Stability Structural Biology Group Mechanisms of Genome Dynamics Group Mechanisms of Mutation Group Mitochondrial DNA Replication Group Mutagenesis & DNA Repair Regulation Group Nuclear Magnetic Resonance Group Stalled Replication Repair Group Structure Function Group Scientist Emeritus Chief Robert S. Williams, Ph.D. Acting Chief, Genome Integrity and Structural Biology Laboratory and Principal Investigator Tel 984-287-3542 [email protected] Deputy Chief William C. Copeland, Ph.D. Deputy Chief, Genome Integrity and Structural Biology Laboratory and Principal Investigator Tel 984-287-4269 [email protected] Chromosome Stability Group Michael A. Resnick, Ph.D. (Retired) Scientist Emeritus Tel 984-287-4109 [email protected] DNA Repair & Nucleic Acid Enzymology Group William A. Beard, Ph.D. Staff Scientist Tel 984-287-3570 [email protected] Julie K. Horton, Ph.D. Staff Scientist Tel 984-287-3571 [email protected] DNA Replication Fidelity Group Thomas A. Kunkel, Ph.D. NIH Distinguished Investigator Tel 984-287-4281 [email protected] Scott A. Lujan, Ph.D. Biologist Tel 919-619-1254 [email protected] Sarah A. Marks, Ph.D. Fellow - IRTA Tel 984-287-4283 [email protected] Mahina Monsur, Ph.D. Fellow - Visiting Tel 984-287-4281 [email protected] Jessica S. Williams, Ph.D. Staff Scientist Tel 984-287-4290 [email protected] Genome Stability Structural Biology Group Robert S. Williams, Ph.D. Acting Chief, Genome Integrity and Structural Biology Laboratory and Principal Investigator Tel 984-287-3542 [email protected] Cathryn D. Appel, M.S. Biologist Tel 984-287-3534 [email protected] Oya Bermek, Ph.D. Staff Scientist Tel 984-287-3539 [email protected] Percy P. Tumbale, Ph.D. Biologist Tel 984-287-3536 [email protected] Ananda Ayyappan Jaguva Vasudevan, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-3535 [email protected] Jessica L. Wojtaszek, Ph.D. Biologist Tel 984-287-3533 [email protected] Mechanisms of Genome Dynamics Group Dmitry A. Gordenin, Ph.D. Principal Investigator Tel 984-287-4117 [email protected] Yun-Chung Hsiao, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-4697 [email protected] Zachary W. Kockler, Ph.D. Special Volunteer Tel 984-287-4121 [email protected] Safia Mahabub Sauty, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-4121 [email protected] Brett A. Shore Fellow - IRTA Postbaccalaureate Tel 984-287-4117 [email protected] Joan F. Sterling Biologist Tel 984-287-4120 [email protected] Lauren S. Taylor Fellow - IRTA Postbaccalaureate Tel 984-287-4122 [email protected] Mechanisms of Mutation Group Roeland M. Schaaper, Ph.D. Principal Investigator Tel 984-287-4287 [email protected] Niketa Bhawsinghka, Ph.D. Fellow - Visiting Tel 984-287-4292 [email protected] Abra N. Granger Fellow - IRTA Postbaccalaureate Tel 984-287-4294 [email protected] Bradley P. Klemm, Ph.D. Biologist Tel 984-287-4264 [email protected] Mitochondrial DNA Replication Group William C. Copeland, Ph.D. Deputy Chief, Genome Integrity and Structural Biology Laboratory and Principal Investigator Tel 984-287-4269 [email protected] Shi-Lan Wu, Ph.D. Biologist Tel 984-287-3487 [email protected] Dillon E. King, Ph.D. Fellow - IRTA Tel 984-287-4270 [email protected] Shruti Somai-Hyatt, Ph.D. Fellow - Visiting Tel 984-287-4266 [email protected] Chioma H. Aloh, Ph.D. Fellow - Visiting Tel 984-287-4266 [email protected] Margaret A. Gustafson, Ph.D. Special Volunteer Tel 984-287-4236 [email protected] Amanda A. Riccio, Ph.D. Special Volunteer Tel 984-284-4266 [email protected] Mutagenesis & DNA Repair Regulation Group Paul W. Doetsch, Ph.D. Deputy Scientific Director and Senior Investigator Tel 984-287-3643 [email protected] Yukitomo Arao, Ph.D. Staff Scientist Tel 984-287-4322 [email protected] Natalya P. Degtyareva, Ph.D. Staff Scientist Tel 984-287-4096 [email protected] Maria L. Garcia Villada, Ph.D. Contractor - Biologist Tel 984-287-3546 [email protected] Nuclear Magnetic Resonance Group Geoffrey A. Mueller, Ph.D. Director, Nuclear Magnetic Resonance Research Core Facility and Principal Investigator Tel 984-287-3589 [email protected] Xunyang Chen Fellow - IRTA Postbaccalaureate Tel 984-287-4588 [email protected] Rodney E. De Diavoukana Fellow Tel 984-287-3589 [email protected] Eugene F. Derose, Ph.D. Contractor - NMR Center Manager Tel 984-287-3572 [email protected] Scott A. Gabel Biologist Tel 984-287-3587 [email protected] Gage O. Leighton Fellow - IRTA Postdoctoral Tel 984-287-4588 [email protected] Stalled Replication Repair Group Rajula P. Alleva, Ph.D. Principal Investigator Tel 984-287-4668 [email protected] Chayan Bhattacharya, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-4668 [email protected] Akbar Zainu, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-4723 [email protected] Structure Function Group Lars C. Pedersen, Ph.D. Director, X-ray Crystallography Facility and Principal Investigator Tel 984-287-3538 [email protected] Andrea M. Kaminski Biologist Tel 984-287-3537 [email protected] Scientist Emeritus Robert E. London, Ph.D. (Retired) Scientist Emeritus Tel 919-491-0001 [email protected] Back to Top Last Reviewed: April 17, 2026