Răspuns :
H2N-CH2-CONH-CH2-CONH-CH(CH3)-COOH = Gli-Gli-Ala
H2N-CH2-CONH-CH(CH3)-CONH-CH2-COOH = Gli-Ala-Gli
H2N-CH(CH3)-CONH-CH2-CONH-CH2-COOH = Ala-Gli-Gli
H2N-CH2-CONH-CH2-CONH-CH(CH3)-COOH = Gli-Gli-Ala
H2N-CH2-CONH-CH(CH3)-CONH-CH2-COOH = Gli-Ala-Gli
H2N-CH(CH3)-CONH-CH2-CONH-CH2-COOH = Ala-Gli-Gli