L-cystine (cross-link) (2R,2'R)-3,3'-disulfane-1,2-diylbis(2-aminopropanoic acid) -2.0156500339508056641 -2.0199999809265136719 2-amino-3-(2-amino-2-carboxy-ethyl)disulfanyl-propanoic acid 204.002716064453125 204.2599945068359375 3,3'-disulfane-1,2-diylbis(2-azanylpropanoic acid) 3,3'-dithiobis(2-aminopropanoic acid) 3,3'-dithiobisalanine 3,3'-dithiodialanine A protein modification that effectively cross-links two L-cysteine residues to form L-cystine. C 0 H -2 N 0 O 0 S 0 C 6 H 8 N 2 O 2 S 2 C, C Cross-link 2; for formation of a disulfide bond between a peptide cysteine and a free cysteine, see MOD:00765. Cys2 Cystine ((Cys)2) DISULFID DISULFID Interchain L-cystine MOD:00034 PSI-MOD XLNK-SCys-SCys beta,beta'-diamino-beta,beta'-dicarboxydiethyldisulfide beta,beta'-dithiodialanine bis(alpha-aminopropionic acid)-beta-disulfide bis(beta-amino-beta-carboxyethyl)disulfide dicysteine natural disulfide crosslinked residues