Scientists & Staff | National Institute of Environmental Health Sciences Skip Navigation Scientists & Staff Close the left navigation Add DNA Replication Fidelity Group Thomas A. Kunkel, Ph.D. NIH Distinguished Investigator Tel 984-287-4281 [email protected] Margaret M. Humble Biologist Tel 984-287-3440 [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] Percy L. Schuck, Ph.D. Fellow - IRTA Tel 984-287-4283 [email protected] William H. Wilkins, Ph.D. Fellow - IRTA Tel 984-287-4585 [email protected] Jessica S. Williams, Ph.D. Staff Scientist Tel 984-287-4290 [email protected] Back to Top Last Reviewed: April 10, 2026