L-lanthionine (Cys-Ser) (2R,2'R)-3,3'-sulfanediylbis(2-aminopropanoic acid) (R)-S-(2-amino-2-carboxyethyl)-L-cysteine (R,R)-2,6-diamino-4-thiaheptanedioic acid (R,R)-3,3'-thiobis-(2-aminopropanoic acid) (R,R)-bis(2-amino-2-carboxyethyl)sulfide -18.010564804077148438 -18.020000457763671875 172.0306549072265625 172.1999969482421875 2-amino-3-(2-amino-2-carboxyethyl)sulfanylpropanoic acid 3,3'-thiobis-L-alanine A protein modification that effectively cross-links an L-cysteine residue and an L-serine residue by a thioether bond to form L-lanthionine. C 0 H -2 N 0 O -1 S 0 C 6 H 8 N 2 O 2 S 1 C, S Cross-link 2. The natural occurrence of this modification is rare. For the more common modification see MOD:00120 meso-lanthionine [JSG]. L-lanthionine MOD:00119 PSI-MOD XLNK-SCys-(L)3Dha artifact crosslinked residues with loss of water L-lanthionine crosslinked L-serine residue