L-PHENYLALANINE (13C9) is an isotopically labeled, proteinogenic amino acid belonging to the phenylalanine class, featuring a benzyl side chain attached to the α-carbon of the amino acid backbone. The molecule contains a free amino group and a free carboxyl group on the α-carbon, with nine carbon atoms in the labeled framework replaced by 13C, while the side chain retains the aromatic phenyl ring characteristic of phenylalanine. As an 13C tracer, it is used in isotopic labeling for amino acid metabolism studies, quantitative mass spectrometry and NMR method development, and the preparation of labeled amino acid building blocks for peptide or protein labeling workflows.
CAT No: L-Iso-0480
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