Of the aromatic products of the Shikimate pathway, it has the lowest hydropathy index. This molecule's namesake hydroxylase catalyzes the first step in catecholamine synthesis, and it serves as a precursor of melanin, dopamine, and epinephrine. The inability to transform phenylalanine into this amino acid leads to PKU, and 
Of the aromatic products of the Shikimate pathway, it has the lowest hydropathy index. This molecule's namesake hydroxylase catalyzes the first step in catecholamine synthesis, and it serves as a precursor of melanin, dopamine, and epinephrine. The inability to transform phenylalanine into this amino acid leads to PKU, and it features a bulky aromatic side chain and an OH group. For 10 points, name this amino acid whose one letter abbreviation is Y, and whose three letter abbreviation is TYR.
Of the aromatic products of the Shikimate pathway, it has the lowest hydropathy index.
tyrosine