Chemical Tools for Imaging, Manipulating, and Tracking Biological Systems: Diverse Methods for Prokaryotic and Eukaryotic Systems, Volume 638, the latest release in the Methods in Enzymology series, continues the legacy of this premier serial with quality chapters authored by leaders in the field. Sample chapters from this new release include In vitro characterization of the colibactin-activating peptidase ClbP enables development of a fluorogenic activity probe, Using FDAA probes to study cell division in Bacillus subtilis, Chemoenzymatic synthesis of UDP-sugars, Chemical tools for selective activity profiling of bacterial penicillin-binding proteins, Chemical Probes Reveal and Extraseptal Mode of Cross-linking in Staphylococcus Aureus, and much more.