Question

Va rog!
1.Scrieti formulele structurale pentru urmatoarele tripeptide:
a) Gli-Gli-Gli
b)alfa-Ala-alfa-Ala-Gli
2.Precizati caracterul acido-bazic al glicinei la pH=7.

Answer 1

1)

a)

Gli = H2N-CH2-COOH

=>

H2N-CH2-CONH-CH2-CONH-CH2-COOH

b)

alfa-Ala = H2N-C(CH3)H-COOH

gli = H2N-CH2-COOH

=>

H2N-C(CH3)H-CONH-C(CH3)H-CONH-CH2-COOH

2)

amfoter

in solutie apoasa la pH = 7

⁺H3N-CH2-COO⁻