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PCAT Chemical Processes – Aromatic Amino Acids

Aromatic amino acids include all of the following EXCEPT:

A. R
B. F
C. W
D. Y

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A is correct. If you have not yet memorized the one- and three-letter abbreviations for all 20 standard amino acids, be sure to do so before Test Day! Arginine (R) is a basic amino acid and is not aromatic. Phenylalanine (F), tryptophan (W), and tyrosine (Y) are all aromatic.

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