2024年7月31日 · Tyrosinemia is a rare genetic disorder characterized by elevated levels of the amino acid tyrosine in the blood. This condition is caused by a deficiency in one of the enzymes responsible for breaking down tyrosine, leading to its accumulation.

L-Tyrosine or tyrosine (symbol Tyr or Y) [2] or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a conditionally essential amino acid with a polar side group .

Amino Acid Abbreviation Structure MW pKa (25 °C) pI (25° C) -CO2H -NH2 sidechain Alanine Ala A 89.10 2.35 9.87 6.11 Arginine Arg R 174.20

1 pKa：-COOH基团解离常数的对数的负数。 2 pKb：-NH3基团解离常数的对数的负数。 3 pKx：分子中其他基团解离常数的对数的负数。 4 pl：等电点的pH值 参考文献：D.R.Lide, Handbook of Chemistry and Physics, 72nd Edition, CRC Press, Boca Raton, FL, 1991.

酪氨酸（Tyrosine, 縮寫為 Tyr or Y） [1] 或 4 - 羥基苯丙氨酸, 是細胞用來合成蛋白質的22種胺基酸之一，在細胞中可用於合成蛋白質，其密碼子為UAC和UAU，屬於含有極性側基，人體可自行合成的非必需胺基酸。

2022年1月1日 · Tyr 除此之外，还有一些三字母或单字母符号可用来表示未明确定义的缩写： Asx、B可代表天冬氨酸（Asp、D）或天冬酰胺（Asn、N）。

酪氨酸（tyrosine；Tyr）的化学名称为2-氨基-3-对羟苯基丙酸，它是一种含有酚羟基的芳香族极性α-氨基酸。 酪氨酸是人体的条件必需氨基酸和生酮生糖氨基酸 。

Aromatic Amino Acids (Phe, Trp, Tyr) Absorb light at 280 nm, UV absorption used as a measure of protein concentration--Warburg-Christian Tyr side chain has pKa = 10.1 (~10)

In the electronic ground state, the para-coumaric acid (pCA) chromophore of PYP is nega-tively charged and forms two short hydrogen bonds to the side chains of Glu-46 and Tyr-42. The resulting acid triad is central to the marked pH dependence of …

Tyrosine pKa. Tyrosine possesses three critical pKa values: the α-carboxyl group exhibits a pKa of 2.2, the α-amino group has a pKa of 9.1, and the phenolic hydroxyl group on the side chain displays a pKa of 10.1.