L-methionine amide (2S)-2-amino-4-(methylsulfanyl)butanamide -0.98000001907348632812 -0.98401600122451782227 147.0592041015625 147.220001220703125 2-amino-4-(methylthio)butanamide A protein modification that effectively converts an L-methionine residue to L-methionine amide. C 0 H 1 N 1 O -1 S 0 C 5 H 11 N 2 O 1 S 1 C-term L-methionine amide M MOD:00102 MOD_RES Methionine amide MetN PSI-MOD amidated L-methionine methioninamide natural uniprot.ptm:PTM-0164 C1-amidated residue modified L-methionine residue