L-cystine (cross-link) -2.0156500339508056641 -2.0199999809265136719 204.002716064453125 204.2700042724609375 3,3'-dithiodialanine DISULFID Cross-link 2; for formation of a disulfide bond between a peptide cysteine and a free cysteine, see MOD:00765. 3,3'-dithiobisalanine PSI-MOD C, C bis(alpha-aminopropionic acid)-beta-disulfide 2-amino-3-(2-amino-2-carboxy-ethyl)disulfanyl-propanoic acid (2R,2'R)-3,3'-disulfane-1,2-diylbis(2-aminopropanoic acid) MOD:00034 XLNK-SCys-SCys Cys2 natural Cystine ((Cys)2) A protein modification that effectively cross-links two L-cysteine residues to form L-cystine. 3,3'-disulfane-1,2-diylbis(2-azanylpropanoic acid) H -2 3,3'-dithiobis(2-aminopropanoic acid) beta,beta'-dithiodialanine C 6 H 8 N 2 O 2 S 2 none dicysteine DISULFID Interchain bis(beta-amino-beta-carboxyethyl)disulfide L-cystine beta,beta'-diamino-beta,beta'-dicarboxydiethyldisulfide disulfide crosslinked residues