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What is a peptide bond?
A peptide bond is a bond that links two amino acids together in a protein to form a long chain.
A peptide bond is ##"-CO-NH-"##
It joins the ##"CO-"## of one amino acid with the ##"-NH"## of another,as in glycylalanine:
##"H"_2"NCH"_2"CO-NHCH"("CH"_3)"COOH"##