Question

Threonine has two asymmetric centers and, therefore, has four stereoisomers. Naturally occurring l-threonine is (2S,3R)-threonine. Which of the following stereoisomers is l-threonine?

ÇOO,
-NH3
ÇOO
ÇOO
Н-
-NH3
Но-
ČH3
Н,N-
Н
-ОН
CH3
Н,N-
-н
Н-
FOH
ČH3
Но—н
ČH3
-H-
в
Expand
Transcribed Image Text

ÇOO, -NH3 ÇOO ÇOO Н- -NH3 Но- ČH3 Н,N- Н -ОН CH3 Н,N- -н Н- FOH ČH3 Но—н ČH3 -H- в

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