S-(glycyl)-L-cysteine (Cys-Gly) (2R)-2-amino-3-[(aminoacetyl)sulfanyl]propanoic acid -18.010564804077148438 -18.020000457763671875 1-(cystein-S-yl)-glycinate 159.0228271484375 159.17999267578125 A protein modification that effectively crosslinks an L-cysteine residue and a glycine residue by a thioester bond to form S-glycyl-L-cysteine. ACT_SITE Glycyl thioester intermediate C 0 H -2 N 0 O -1 S 0 C 5 H 7 N 2 O 2 S 1 C, G C-term Cross-link 2. For the modification of a C-terminal glycine by formation of a thioester bond with free L-cysteine see MOD:01777 [JSG]. MOD:00211 PSI-MOD S-(2-amino-1-oxoethyl)cysteine S-(glycyl)-L-cysteine XLNK-SCys-1Gly glycine cysteine thioester uniprot.ptm:PTM-0429 thioester crosslinked residues crosslinked residues with loss of water crosslinked glycine residue