L-cysteine 5-imidazolinone glycine -18.010564804077148438 -18.020000457763671875 142.02008056640625 142.17999267578125 Cross-link 2; carboxamidine; incidental to RESID:AA0181; incidental to RESID:AA0183; incidental to RESID:AA0365. H -2 O -1 2-[1-amino-2-sulfanylethyl]-1-carboxymethyl-1-imidazolin-5-one A protein modification that effectively crosslinks an L-cysteine residue and a glycine residue to form L-cysteine 5-imidazolinone glycine. XLNK-1Cys-NGly(Imidazole) para-hydroxybenzylidene-imidazolidinone chromophore L-cysteine 5-imidazolinone glycine none PSI-MOD 4-methylidene-imidazole-5-one (MIO) active site C, G CROSSLNK 5-imidazolinone (Cys-Gly) cysteinyl-5-imidazolinone glycine MOD:00196 C 5 H 6 N 2 O 1 S 1 natural (2-[(1R)-1-amino-2-sulfanylethyl]-5-oxo-4,5-dihydro-1H-imidazol-1-yl)acetic acid crosslinked residues with loss of water 5-imidazolinone ring crosslinked residues (Gly) crosslinked L-cysteine residue crosslinked glycine residue