2-(S-L-cysteinyl)pyruvic acid O-phosphothioketal 167.9823760986328125 168.0399932861328125 270.991546630859375 271.19000244140625 phospholactoyl cysteine adduct phosphoenolpyruvate cysteine adduct SPEPCys 2-([(2R)-2-azanyl-2-carboxyethyl]sulfanyl)-2-(phosphonooxy)propanoic acid 2-(S-L-cysteinyl)pyruvic acid O-phosphothioketal S-[1-carboxy-1-(phosphonooxy)ethyl]cysteine MOD:00797 (2R)-2-amino-3-[1-carboxy-1-(phosphonooxy)ethyl]sulfanylpropanoic acid MOD_RES 2-(S-cysteinyl)pyruvic acid O-phosphothioketal C 6 H 10 N 1 O 7 P 1 S 1 2-([(2R)-2-amino-2-carboxyethyl]sulfanyl)-2-(phosphonooxy)propanoic acid C natural a protein modification that effectively converts an L-cysteine residue to the PEP adduct, 2-(S-L-cysteinyl)pyruvic acid O-phosphothioketal cysteinyl pyruvate O-phosphothioketal C 3 H 5 O 6 P 1 PSI-MOD none phosphorus containing modified residue modified L-cysteine residue