L-Phenylalanine is an essential amino acid, which is biologically converted into L-tyrosine, another one of the DNA-encoded amino acids, which in turn is converted to L-DOPA and further converted into dopamine, norepinephrine, and epinephrine. L-Phenylalanine is produced for medical, feed, and nutritional applications such as in the preparation of Aspartame.
P 1595 (OTTO) L-Phenyl alanine, 99%+ Cas 63-91-2 - used to biochemically form proteins, coded for by DNA.