Amide nitrogen in unlikely to be a proton acceptor.
D000577:Amides; D001665:Binding Sites; D002384:Catalysis; D055598:Chemical Phenomena; D002621:Chemistry; D010447:Peptide Hydrolases / Q000378:metabolism*; D011522:Protons
D000577:Amides; D011522:Protons; D010447:Peptide Hydrolases