dltyrosine

DL-Tyrosine 是一种由必需氨基酸苯丙氨酸合成的芳香族非必需氨基酸。它是几种重要神经递质（如肾上腺素、去甲肾上腺素、多巴胺）的前体。

L-Tyrosine-13C9,15N is intended for use as an internal standard for the quantification of L-tyrosine by GC- or LC-MS. L-Tyrosine is a non-essential amino acid.1It is produced by hydroxylation of phenylalanine by phenylalanine hydroxylase but can also be obtained from dietary sources or degradation of endogenous proteins, resulting in L-tyrosine release.1,2L-Tyrosine is a precursor in the biosynthesis of catecholamine neurotransmitters, melanins, and thyroid hormones.3Plasma, skeletal muscle, and erythrocyte levels of L-tyrosine are decreased in patients with chronic kidney disease.1 1.Kopple, J.D.Phenylalanine and tyrosine metabolism in chronic kidney failureJ. Nutr.137(6 Suppl 1)1586S-1590S(2007) 2.Webster, D., and Wildgoose, J.Tyrosine supplementation for phenylketonuriaCochrane DB Syst. Rev.2013(6)CD001507(2013) 3.Slominski, A., and Paus, R.Towards defining receptors for L-tyrosine and L-DOPAMol. Cell Endocrinol.99(2)C7-C11(1994)

3-METHOXY-DL-TYROSINE 是一种在人体和许多其他生物体中发现的天然氨基酸，是一种非必需氨基酸。它是神经递质多巴胺的前体，参与大脑中多巴胺水平的调节，在多种疾病中有潜在治疗应用，包括帕金森病、抑郁症和肥胖症。

DL-Tyrosine (Standard) 是 DL-Tyrosine 的标准品，适用于定量分析、质量控制及生化实验等相关研究。DL-Tyrosine 是一种由必需氨基酸苯丙氨酸合成的芳香族非必需氨基酸。它是几种重要神经递质（如肾上腺素、去甲肾上腺素、多巴胺）的前体。