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L-Histidine monohydrochloride monohydrat 是一种 α-氨基酸。 L-异构体是 22 种蛋白质氨基酸之一,即蛋白质的组成部分。
L-Histidine monohydrochloride monohydrat 是一种 α-氨基酸。 L-异构体是 22 种蛋白质氨基酸之一,即蛋白质的组成部分。
规格 | 价格 | 库存 | 数量 |
---|---|---|---|
500 mg | ¥ 163 | 现货 |
产品描述 | Histidine (abbreviated as His or H) is an alpha-amino acid. The L-isomer is one of the 22 proteinogenic amino acids, i.e., the building blocks of proteins. It is classified as a charged, polar because of the hydrophilic nature of the imidazole side chain. L-Histidine is a positively charged (pKa 6.5) aromatic amino acid. Histidine residues are often found in enzyme active sites, where the chemistry of the imidazole ring of histidine makes it a nucleophile and a good acid/base catalyzer. Histidine is special in that its biosynthesis is inherently linked to the pathways of nucleotide formation. In the first step of histidine synthesis, PRPP (5-phosphoribosyl-alpha-pyrophosphate) condenses with ATP to form a purine, N1-5'-phosphoribosyl ATP, in a reaction that is driven by the subsequent hydrolysis of the pyrophosphate that condenses out. Glutamine plays a role as an amino group donor resulting in the formation of 5-aminoamidazole-4-carboximide ribonucleotide (ACAIR), which is an intermediate in purine biosynthesis. Hisitidne is catabolized by the enzyme histidine ammonia-lyase which converts histidine into ammonia and urocanic acid. |
别名 | L-盐酸组氨酸一水物 |
分子量 | 209.63 |
分子式 | C6H12ClN3O3 |
CAS No. | 5934-29-2 |
Smiles | O.Cl.NC(Cc1c[nH]cn1)C(O)=O |
密度 | 1.49 g/cm3 |
存储 | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
溶解度信息 | DMSO: Slightly soluble |
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