V2EX cytochrome p450

Cytochrome P450

释义 Definition

细胞色素P450:一大类含血红素(heme)的酶(主要位于肝脏等组织的内质网或线粒体),通过氧化反应参与药物代谢、解毒与类固醇等内源性物质的合成/转化。“P450”源于其与一氧化碳结合后在450 nm处出现特征吸收峰。(也常简称为“CYP”。)

发音 Pronunciation (IPA)

/satokrom fr ffti/

例句 Examples

Cytochrome P450 helps the liver break down many medicines.
细胞色素P450帮助肝脏分解许多药物。

Genetic differences in cytochrome P450 enzymes can change how quickly a person metabolizes a drug, affecting both effectiveness and side effects.
细胞色素P450酶的遗传差异会改变个体代谢药物的速度,从而影响疗效与不良反应。

词源 Etymology

“Cytochrome”来自“cyto-(细胞)+ chrome(颜色)”,指这类带色素的蛋白;“P450”中的“P”常被解释为“pigment(色素)”,而“450”指该蛋白在与一氧化碳结合、处于还原态时在450纳米附近出现的特征光谱峰值,因此得名。

相关词 Related Words

文学与著作中的用例 Literary Works

  • Lehninger Principles of Biochemistry(《莱宁格生物化学原理》)
  • Goodman & Gilman’s The Pharmacological Basis of Therapeutics(《古德曼与吉尔曼:药理学基础》)
  • Casarett & Doull’s Toxicology: The Basic Science of Poisons(《卡萨雷特与杜尔毒理学》)
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