p-Nitrobenzyl mesylate (PNBM) is a thiol-specific alkylating reagent for direct kinase substrate identification. p-Nitrobenzyl mesylate (PNBM) alkylates thiophosphorylated proteins to form thiophosphate ester epitopes that can be detected by thiophosphate-ester-specific antibody by immunoblotting, immunoprecipitation or immunoaffinity purification.

thiol-specific alkylating reagent for direct kinase substrate identification

Hygroscopic