D-PHENYLALANINE (RING-D5) is a deuterium-labeled, non-proteinogenic isotopically substituted amino acid derivative of phenylalanine in which five deuterium atoms are incorporated into the aromatic ring. The molecule contains a primary amino group and a carboxyl functional group on the side chain-bearing carbon, with the benzyl side chain retaining an unsubstituted phenyl framework except for the ring deuteration, and it is explicitly specified as the D stereochemical form. In research and analytical workflows, this isotopically labeled amino acid is used as a stable isotope tracer or internal standard for LC-MS or NMR studies of amino acid handling, peptide/protein labeling, and incorporation patterns where aromatic-ring deuteration provides a distinguishable mass signature.
CAT No: L-Iso-0498
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