A namesake ammonialyase of this amino acid converts it into cinnamate, and Seymour Kaufman first discovered the importance of the coenzyme tetrahydrobiopterin in this amino acid's hydroxylase. Nirenberg and Matthaei began decoding the genetic code by finding that the codon UUU encoded this amino acid. With aspartic acid it makes Aspartame. Chorismate mutase catalyzes the formation of prephenate, a precursor to both tyrosine and this other amino acid. Failure to convert this amino acid into tyrosine results in a buildup 
A namesake ammonialyase of this amino acid converts it into cinnamate, and Seymour Kaufman first discovered the importance of the coenzyme tetrahydrobiopterin in this amino acid's hydroxylase. Nirenberg and Matthaei began decoding the genetic code by finding that the codon UUU encoded this amino acid. With aspartic acid it makes Aspartame. Chorismate mutase catalyzes the formation of prephenate, a precursor to both tyrosine and this other amino acid. Failure to convert this amino acid into tyrosine results in a buildup of phenylpyruvic acid in the metabolic disorder PKU. For 10 points, name this amino acid abbreviated Phe.
A namesake ammonialyase of this amino acid converts it into cinnamate, and Seymour Kaufman first discovered the importance of the coenzyme tetrahydrobiopterin in this amino acid's hydroxylase.
{phenylalanine} [prompt on {Phe} and {F}]