disulfide crosslinked residues L-cystine S-oxide 13.979265213012695312 13.979999542236328125 219.9976348876953125 220.2700042724609375 C 6 H 8 N 2 O 3 S 2 none CROSSLNK S-cysteinyl 3-(oxidosulfanyl)alanine (Cys-Cys) S-[(2R)-2-amino-3-oxopropyl] (2R)-2-amino-3-oxopropane-1-sulfinothioate cystine sulfoxide MOD:01383 Cross-link 2. L-cystine S-oxide (2R)-2-amino-3-[([(2R)-2-amino-2-carboxyethyl]sulfanyl)sulfinyl]propanoic acid hypothetical PSI-MOD C, C S-cysteinyl 3-(oxidosulfanyl)alanine A protein modification that effectively cross-links two L-cysteine residues and oxidizes a sulfur to form L-cystine S-oxide. H -2 O 1 crosslinked L-cysteine residue