What is the one letter symbol of the amino acid below?

Name: What is the one letter symbol of the amino acid below?
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Question

Quizplus · Accepted Answer

The one letter symbol for tryptophan is W, which is not an option in the answer choices. However, a unique feature of tryptophan is that its side chain can absorb UV light, making it useful for certain spectrophotometric analyses. Therefore, the answer must be C, which is the only option that contains a UV light-absorbing aromatic amino acid: phenylalanine (F).

What Is the One Letter Symbol of the Amino Acid