D,L-phenylalanine and D-L-dihydroxyphenyalanine (DOPA) were studied because of the great expense of the L-compounds. These amino acids, obtained from the nutritional Biochemicals Corporation ...

For example, the amino acid L-DOPA is used to treat Parkinson's disease, while L-glutamine supplementation is being investigated for its potential to reduce the side effects of cancer chemotherapy.

Related: How Tyrosine, an Amino Acid, Works in the Body When L-tyrosine enters the body, it is transformed into L-DOPA, a precursor to dopamine. This reaction can continue, helping to produce ...

Subsequent oxidation changes the DOPA moiety into a high-efficiency cross-linker to nearby nucleophilic amino acids. Thus the biotin label is transferred from the bait protein to its nearest ...