Molecular Weight: 624.7Salt Form: TFAPurity: >95%Sequence (3-letter): Z-Val-Pro-Arg-pNASequence (1-letter): Z-VPR-pNAStorage: -20 °C or belowA colorimetric substrate for thrombin. Activity is quantified by the release of p-nitroaniline which is measured by absorbance at 405 nm.