Essential Biochemistry - Chemistry Of Proteins (Section 2 - No. 37)

All amino acids found in proteins are optically active, except

Serine

Glycine

Tyrosine

Threonine

Explanation

Glycine is achiral (not optically active) because its side chain is just a hydrogen atom. All other amino acids have four different groups attached to the alpha-carbon.

Essential Biochemistry - Chemistry Of Proteins (Section 2 - No. 37)

Explanation

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