1MB = MALA + MPHE 18 = 236 NÊN B LA ALA PHE HOĂC PHEALA ̀ ̣0,25MC = MGLY + MPHE 18 = 222 NÊN C LA PHEGLY HOĂC GLYPHE ̀ ̣VÂY A CO THÊ LA
8.1
M
B
= M
Ala
+ M
Phe
18 = 236 nên B la Ala Phe hoăc PheAla ̀ ̣
0,25
M
C
= M
Gly
+ M
Phe
18 = 222 nên C la PheGly hoăc GlyPhe ̀ ̣
Vây A co thê la: AlaPheGly hoăc GlyPheAla ̣ ́ ̉ ̀ ̣
Câu tao A: ́ ̣
H NCH CH CONHCH CH C H CONHCH COOH
2
(
3
) (
2 6
5
)
2
(AlaPheGly)
H NCH CONHCH CH C H CONHCH CH COOH
2
2
(
2 6
5
) (
3