K 579 is a dipeptidyl peptidase IV inhibitor.

Gemigliptin (LC15-0444) tartrate hydrate 是一种选择性、可逆且竞争性的二肽基肽酶 4 (DPP-4) 抑制剂，其对人重组DPP-4的IC50值为10.3 nM。Gemigliptin tartrate hydrate 具有显著的抗糖基化特性，并可用于研究与晚期糖基化终产物相关的糖尿病并发症。

Fluostatin A是一种最初从链霉菌中分离出的荧光酮类化合物。它对二肽基肽酶3（DPP-3）的选择性抑制作用优于对DPP-1、DPP-2和DPP-4的抑制作用（IC50s分别为0.44, >100, >100, 和 >100 µg/ml）。

Z-Leu-Tyr-Chloromethylketone是一种抑制剂，专门针对钙蛋白酶(calpain)活性。

Calpastatin subdomain B为具有生物活性的肽，其作用为抑制钙蛋白酶活性。

Z-LLL-AMC is a fluorogenic substrate for the chymotrypsin-like activity of the 26S proteasome or 20S proteolytic core. Chymotrypsin-like activity can be quantified by fluorescent detection of free AMC (also known as 7-amino-4-methylcoumarin), which is excited at 340-360 nm and emits at 440-460 nm. Z-LLL-AMC is typically used in cell lysates after experimental treatment.