derives from N-formyl-L-methionine residue N-(dihydroxymethyl)-L-methionine (fMet) 178.0537872314453125 178.2299957275390625 18.010564804077148438 18.020000457763671875 N-term C 6 H 12 N 1 O 3 S 1 (2S)-2-[(dihydroxymethyl)amino]-4-(methylsulfanyl)butanoic acid N-(dihydroxymethyl)-L-methionine N-orthoformylmethionine MOD:00030 PSI-MOD hypothetical MOD:01446 N-formyl-L-methionine hydrate H 2 O 1 A protein modification that effectively converts an N-formyl-Lmethionine residue to N-(dihydroxymethyl)-L-methionine. modified N-formyl-L-methionine residue