这样的受体可以是蛋白质、酶、膜通道或外来病原体的一个区域。

Thus a receptor may be a protein, enzyme, membrane channel, or a region of a foreign pathogen.

youdao

这种膜上的蛋白通道，直径只有几个纳米，可以（也只可以）让水分子通过，其通道每秒可过滤10亿个水分子。

The membrane’s protein channels, each just a few nanometers across, allow a stream of water molecules—and only water molecules—to pass single file at a rate of one billion per second.

youdao

检测膜离子通道同源蛋白FXYD家族成员2、4在大、小鼠肝外胆管中的表达情况。

To investigate expressions of homologous membranous ion channel proteins FXYD2 and FXYD 4 in murine normal extrahepatic bile duct.

youdao

So, that is just a quick example for some of you, you might be very familiar with ion channels, others might not know what these are, so I'll just tell you quite briefly that ion channels are these very massive transmembrane proteins.

这对你们中的某些人来说仅仅是个小例子，有些人可能已经非常熟悉离子通道这个概念了，但有些人可能还不清楚，那么就让我来简单地介绍一下离子通道,就是这些巨大的跨膜蛋白。

麻省理工公开课 - 化学原理课程节选