[ASAP] Cysteine Counting via Isotopic Chemical Labeling for Intact Mass Proteoform Identifications in Tissue Posted on 4 October 2023 by John G. Pavek, Brian L. Frey, Dustin C. Frost, Ting-Jia Gu, Lingjun Li, and Lloyd M. Smith Analytical ChemistryDOI: 10.1021/acs.analchem.3c02473