Suc-Leu-Tyr-AMC is a fluorescent substrate for calpain I and II, papain (another cysteine protease), and is used to measure the chymotrypsin-like peptidase activity of the 20S proteasome (excitation max: 360 nm; emission max: 460 nm). Suc-Leu-Tyr-AMC can also be cleaved by the Ti protease from E. coli.

(1beta,3beta,25S)-3-Hydroxyspirost-5-en-1-yl 2-O-(6-deoxy-alpha-L-mannopyranosyl)-beta-D-xylopyranoside is a natural product.

[Tyr52] PTH (52-84) (human)