V2EX periplasmic

Periplasmic

释义 Definition

periplasmic(形容词):与周质空间(periplasm)有关的;位于周质空间中的。周质空间通常指革兰氏阴性菌中,位于内膜(细胞质膜)外膜之间的凝胶状空间(也常扩展用于描述某些细菌膜间区域)。

发音 Pronunciation (IPA)

/prplzmk/

例句 Examples

The enzyme is periplasmic and helps break down nutrients before they enter the cell.
这种酶位于周质空间中,帮助在营养物质进入细胞前进行分解。

Periplasmic binding proteins play a key role in bacterial transport systems, influencing how substrates are captured and delivered to membrane transporters.
周质结合蛋白在细菌转运系统中起关键作用,影响底物如何被捕获并递送至膜转运蛋白。

词源 Etymology

periplasmic 来自 peri-(希腊语前缀,意为“周围、环绕”)+ plasm(意为“形成的物质、细胞质”一类的“生物质”概念)+ -ic(形容词后缀,表示“……的”)。字面含义可理解为“围绕细胞质细胞内部物质的(区域)相关的”,在微生物学中具体化为“与周质空间相关”。

相关词 Related Words

文学作品与经典文本 Literary Works

  • 《Molecular Biology of the Cell》(Alberts 等):在细菌细胞结构与膜系统相关章节中会讨论周质空间与相关蛋白的定位概念。
  • 《Brock Biology of Microorganisms》(Madigan 等):在革兰氏阴性菌细胞包被(cell envelope)与周质蛋白功能的内容中常出现该术语。
  • 《Escherichia coli and Salmonella: Cellular and Molecular Biology》(经典参考书):关于大肠杆菌周质蛋白、周质酶与转运系统的章节中频繁使用 periplasmic
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