Dr. Jiafeng "Jeff" Geng was born in a small town in northeastern China. He did his undergraduate study in Chemistry at Zhejiang University in China and continued his graduate research at Georgia State University, where he earned his PhD in 2015. His research at GSU lay at the interface of chemistry and biology, spanning a wide range of topics including mechanistic enzymology of metabolic pathways, protein cofactor biogenesis, and biosynthesis of natural products. His current postdoctoral research with the Barry lab is centered on mechanistic studies of biological electron transfer reactions. Specifically, he focuses on proton-couple transfer (PCET) reactions involved in DNA synthesis and repair mediated by ribonucleotide reductase as well as in photolytic water oxidation catalyzed by photo synthetic reaction centers.