V2EX enteropeptidase

Enteropeptidase

释义 Definition

肠肽酶(又称 enterokinase,旧称“肠激酶”):一种位于小肠(主要是十二指肠)黏膜刷状缘的蛋白酶,其关键作用是把胰蛋白酶原(trypsinogen)切割并激活为胰蛋白酶(trypsin),从而启动多种胰腺消化酶原的级联激活过程。

发音 Pronunciation (IPA)

/ntropptdez/

例句 Examples

Enteropeptidase activates trypsinogen in the small intestine.
肠肽酶在小肠中激活胰蛋白酶原。

A deficiency of enteropeptidase can impair protein digestion by preventing the normal activation cascade of pancreatic zymogens.
肠肽酶缺乏会阻断胰腺酶原的正常激活级联反应,从而影响蛋白质消化。

词源 Etymology

来自 **entero-**(“肠的”,源自希腊语 enteron,意为“肠”)+ peptidase(“肽酶/蛋白酶”,与“肽/消化”相关)。该酶早期常被称为 enterokinase,但现代命名更强调其“切割肽键的酶”这一功能,因此使用 enteropeptidase 更准确。

相关词 Related Words

文学与著作 Literary Works

  • Guyton and Hall Textbook of Medical Physiology(消化生理章节中讨论肠肽酶启动胰酶激活)
  • Ganong’s Review of Medical Physiology(蛋白质消化与胰腺酶原激活相关内容)
  • Harper’s Illustrated Biochemistry(消化酶、酶原与肠肽酶的作用机制)
  • Boron and Boulpaep Medical Physiology(胃肠道生理与刷状缘酶相关叙述)
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