White to off-white lyopilized solid. 45 mg D-mannitol and 5 mg substrate. Sold on the basis of substrate content. PROTECT FROM MOISTURE. AVOID FREEZE/THAW CYCLES. A specific substrate for pancreatic elastase (k_m = 100 µM; k_cat/ K_m = 35,000 M^-1 s^-1 for rat pancreatic elastase, K_m = 30 µM; k_cat/K_m = 35,000 M^-1 s^-1 for porcine). Cleavage of substrate can be monitored at ~405 nm. Purity: ≥95% by HPLC.

Suc-Ala-Ala-Pro-Abu-pNA (Abu = L-a-Aminobutyric Acid)

Ref.: Largman, L. 1983. Biochemistry 22, 3763. Del Mar, E.G., et al. 1980. Biochemistry 19, 468.