Molecular Weight: 490.52Salt Form: N/APurity: >95%Sequence (3-letter): Z-Phe-Ala-pNASequence (1-letter): Z-FA-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.