Question

Cate dipeptide mixte se pot forma din glicocol ,valina si serina daca se tine cont si de asimetria atomilor de carbon din molecula ? A.18. B. 14. C.16. D 12. E nici un raspuns

Answer 1

glicocol : H2N- CH2-COOH                        1
valina : CH3-CH(CH3)-C*H(NH2)-COOH    2 enantiomeri   (v1, v2)
serina : HO-CH2-C*H(NH2)-COOH             2 enantiomeri   (s1,s2)

g-v1; g-v2; g-s1; g-s2; v1-g; v1-v2; v1-s1; v1-s2; s1-g;  s1-v1; s1-v2 ; s1-s2;
s2-g; s2-v1; s2-v2; s2-s1  16-dipeptide