amidated residue C1-amidated residue -0.98000001907348632812 -0.98000001907348632812 -0.98401600122451782227 -0.98401600122451782227 PSI-MOD Amide formation (C terminus) MOD:00883 A protein modification that effectively replaces a 1-carboxyl group (usually referred to as the alpha-carboxyl) with a carboxamido group. H 1 N 1 O -1 H 1 N 1 O -1 X The normal biological process involves formation of an amide of an amino acid residue in a peptide sequence where it is followed by a glycine and two basic residues, either arginine or lysine, although in some taxa only one basic residue is required. The peptide is cleaved after the basic residues, glycine is oxidized to hydroxyglycine, which decomposes to release a carboxamide C-terminal [JSG]. C-term natural ctermamide alpha-amidated residue ResN Amidation Amidated