L-Tyrosine

L-Tyrosine (CAS No.: 60-18-4) is a naturally occurring aromatic, non-essential amino acid biosynthesized in vivo from L-phenylalanine and widely distributed across biological systems as a fundamental building block of proteins and a key metabolic intermediate. It serves as a critical biochemical precursor for the biosynthesis of catecholamines, including epinephrine, as well as thyroid hormones and melanin, thereby occupying a central position in studies of cellular metabolism, signal transduction, and pigment formation pathways. L-Tyrosine has also been reported to modulate enzymatic activity, including the inhibition of citrate synthase in specific neural tissues, suggesting potential utility in investigations of mitochondrial metabolism and metabolic regulation. In biochemical and pharmacological research, it is commonly employed as a substrate or metabolic probe in enzymatic assays, neurotransmitter biosynthesis studies, and pathway elucidation experiments, with activity typically observed in the low micromolar to millimolar concentration range depending on the system and assay conditions. Its well-characterized metabolic roles and involvement in multiple interconnected signaling pathways make L-Tyrosine a valuable tool for in vitro and in vivo models aimed at exploring amino acid metabolism, neurochemical processes, and endocrine regulation, with experimental concentrations or dosing regimens tailored to specific study designs and research objectives.