N-methylglycine 14.015649795532226562 14.029999732971191406 71.03711700439453125 71.0800018310546875 A protein modification that effectively converts a glycine residue to N-methylglycine. C 1 H 2 N 0 O 0 C 3 H 5 N 1 O 1 DeltaMass also has an entry for the free amino acid. Polypeptides with monomethylated amino terminals can undergo premature cleavage during the coupling step of an Edman degradation. This can result in "preview" with both a residue and the following residue being seen from the first step on through a sequence [JSG]. G L-sarcosine MOD:00072 MOD_RES N-methylglycine Methyl Methylation N-methylated glycine N-methylglycine N-term NMe1Gly PSI-MOD Sar Sarcosine Sarcosyl methylaminoacetic acid methylaminoethanoic acid natural uniprot.ptm:PTM-0483 residues isobaric at 71.037114 Da methylated glycine alpha-amino monomethylated residue