has functional parent (2S,3S,2'R)-3-methyllanthionine sulfoxide (2S,3S,4Xi,6R)-2,6-diamino-3-methyl-4-oxo-4-thiaheptanedioic acid (2S,3S,SXi)-2-amino-3-([(R)-2-amino-2-carboxyethyl]sulfinyl)butanoic acid -2.0156500339508056641 -2.0199999809265136719 202.0412139892578125 202.2299957275390625 3-methyl-L-lanthionine S-oxide 3-methyl-L-lanthionine sulfoxide A protein modification that effectively cross-links an L-cysteine residue and an L-threonine residue by a thioether bond to form (2S,3S,2'R)-3-methyllanthionine sulfoxide. C 0 H -2 N 0 O 0 S 0 C 7 H 10 N 2 O 3 S 1 C, T CROSSLNK Beta-methyllanthionine sulfoxide (Thr-Cys) Cross-link 2. MOD:00335 PSI-MOD S-oxy-3-methyllanthionine natural uniprot.ptm:PTM-0069 3-methyllanthionine beta-carbon thioether crosslinked residues crosslinked L-threonine residue