High Quality Content by WIKIPEDIA articles! Ubiquitin-AMC is a fluorogenic substrate for a wide range of deubiquitinating enzymes (DUBs), including ubiquitin C-terminal hydrolases (UCHs) and ubiquitin specific proteases (USPs). It is a particularly useful reagent for the study of deubiquitinating activity where detection sensitivity or continuous monitoring of activity is essential. Ubiquitin-AMC is prepared by the C-terminal derivatisation of ubiquitin with 7-amino-4-methylcoumarin and has been shown to be a useful and sensitive fluorogenic substrate for wide range of deubiquitinylating enzymes (DUBs), including ubiquitin C-terminal hydrolases (UCHs) and ubiquitin specific proteases (USPs). Ubiquitin-AMC has been shown to be a sensitive substrate for UCH-L3 (Km = 0.039µM) (Product code UW9745) and for Isopeptidase-T (Km = 0.17-1.4µM) (Product code UW9690), and is particularly useful for studying deubiquitinylating activity where detection sensitivity or continuous monitoring of activity is essential.