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Question

Amino acids are organic compounds that contain amino and carboxylic groups. In the form of proteins, amino acid residues form the second-largest component of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis.

Serine (HOCH2CH(NH2)COOH) is an essential amino acid. The correct Fisher projection od serine is:

A
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B
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C
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D
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Solution

The correct option is D
In a Fischer projection most oxidised functional group (e.g. COOH group) should be kept on the top of the vertical line.
Hence, structure (d) is the correct Fischer projection of serine.

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