The amino acid threonine is one of the common natural building blocks for proteins. Unlike many of the standard 20 amino acids, it contains 2 stereogenic centers. The natural form, L-Threonine, is shown below.![Molecular structure of L-Threonine]``` O OH ║ HO─C─C─NH₂ │ │ H CH₃```Drawn below are four Fischer projections of threonine stereoisomers. Is each compound an enantiomer, diastereomer, or the correct structure of L-Threonine?**A.**```COOH │ H₂N─C─H │ HO CH₃```**B.**```COOH │ H──C─H │ HO CH₃```**C.**```COOH │ H₂N─C─OH │ H──CH₃```**D.**```COOH │ H──C─H₂N │ HO CH₃```Options for classification (for each stereoisomer):- Diastereomer- Enantiomer- L-Threonine(Selection dropdown available for each structure: A, B, C, D)

Answered: The amino acid threonine is one of the…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The amino acid threonine is one of the common natural building blocks for proteins. Unlike many of the standard 20 amino acids, it contains 2 stereogenic centers. The natural form, L-Threonine, is shown below.

![Molecular structure of L-Threonine]
```
O OH
║
HO─C─C─NH₂
│ │
H CH₃
```

Drawn below are four Fischer projections of threonine stereoisomers. Is each compound an enantiomer, diastereomer, or the correct structure of L-Threonine?

**A.**
```
COOH
│
H₂N─C─H
│
HO CH₃
```

**B.**
```
COOH
│
H──C─H
│
HO CH₃
```

**C.**
```
COOH
│
H₂N─C─OH
│
H──CH₃
```

**D.**
```
COOH
│
H──C─H₂N
│
HO CH₃
```

Options for classification (for each stereoisomer):
- Diastereomer
- Enantiomer
- L-Threonine

(Selection dropdown available for each structure: A, B, C, D)

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Stereochemistry is a branch of chemistry that deal with three dimensional arrangement of atoms within the molecules. In the given structure, we have to identify the relationship between two figures.

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