H-D-Phe-Pip-Arg-pNA hydrochloride, a chromogenic substrate, mimics the N-terminal segment of the A alpha chain of fibrinogen, the native substrate of thrombin. It displays specificity towards thrombin and is employed for quantifying antithrombin-heparin cofactor (AT-III). The utilization of H-D-Phe-Pip-Arg-pNA hydrochloride in the AT-III assay enables a sensitive, accurate, and straightforward measurement process.
N-CBZ-Phe-Arg-AMC (Z-FR-AMC) is a substrate for serine proteases, including cathepsins, kallikrein, and plasmin. The substrate exhibits absorption emission at 330 390 nm (weak fluorescence), while the end product (AMC) shows absorption emission at 342 441 nm (strong fluorescence).
{Boc}-Phe-Leu-Phe-Leu-Phe ({Boc}-FLFLF) is a selective antagonist of the formyl peptide receptor (FPR) family, effectively inhibiting receptor activity in response to formyl peptides.