N,N,N-trimethyl-L-methionine (1S)-1-carboxy-N,N,N-trimethyl-3-(methylsulfanyl)propanaminium (1S)-1-carboxy-N,N,N-trimethyl-3-(methylsulfanyl)propanazanium 1+ 175.1025390625 175.2899932861328125 2-trimethylammonio-4-(methylthio)butanoic acid 43.054225921630859375 43.090000152587890625 A protein modification that effectively converts an L-methionine residue to N,N,N-trimethyl-L-methionine. C 3 H 7 N 0 O 0 S 0 C 8 H 17 N 1 O 1 S 1 M MOD:01382 MOD_RES N,N,N-trimethylmethionine N,N,N-trimethyl-L-methionine N,N,N-trimethylmethionine cation N,N,N-trimethylmethioninium N-term N2Me3+Met PSI-MOD natural uniprot.ptm:PTM-0503 N-methylated methionine alpha-amino trimethylated protonated-residue