trimethylated residue N-methylated residue methylated arginine trimethyl-L-arginine 198.1480560302734375 198.2700042724609375 42.0469512939453125 42.0800018310546875 (2S)-2-amino-5-([(dimethylamino)(methylimino)methyl]amino)pentanoic acid 2-[(4S)-4-amino-5-oxopentyl]-1,1,3-trimethylguanidine Trimethyl A protein modification that effectively converts an L-arginine residue to N(omega),N(omega),N'(omega)-trimethyl-L-arginine. omega-N,omega-N,omega-N'-trimethyl-L-arginine MOD:01669 (2S)-2-amino-5-([(dimethylamino)(methylamino)methylidene]amino)pentanoic acid N(G)-trimethylarginine N5-[(dimethylamino)(imino)methyl]ornithine C 9 H 18 N 4 O 1 hypothetical R PSI-MOD C 3 H 6 none trimethylationr tri-Methylation NoNoNo'Me3Arg