Dr. Li [The Mark Foundation for Cancer Research Fellow] is mapping the positions of the amino acid cysteine in cancer-relevant proteins. He will perform functional screens that reveal the cysteine residues that are essential to the progression of cancer. Since the unique chemistry of cysteine makes it an attractive target for therapeutic development, this map can guide the discovery and optimization of drugs that can bind to and inhibit cancer-promoting proteins. His research has the potential to greatly accelerate the discovery of new cancer targets and their corresponding therapeutics.