Molecular Weight: 550.57Salt Form: TFAPurity: >95%Sequence (3-letter): MeOSuc-Ala-Ala-Arg-pNASequence (1-letter): MeOSuc-AAR-pNAStorage: -20 °C or belowA colorimetric substrate for proteases. Activity is quantified by the release of p-nitroaniline which is measured by absorbance at 405 nm.