These are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. Although your body can make nonessential amino acids, it cannot make essential amino ...

Aspartame a methyl ester L-aspartylphenylalanine, is a widely used sweetener. The intake of aspartame was studied in 51 adults 23 of whom were carriers for phenylketonuria (PKU). The study was ...

During that same year, Marshall Nirenberg and Heinrich Matthaei began deciphering the genetic code, and they determined that the codon UUU specifically represented the amino acid phenylalanine.