这两种蛋白质存在于所有神经细胞之中，并能控制在神经间传递信息的化学物质神经传递素的释放。

These proteins are found in every nerve cell and control the release of the chemicals which neurons use to talk to each other, called neurotransmitters.

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例如，法绍尔就认为，领鞭虫目原虫M. brevicollis能靠Munc18/syntaxin1这一对蛋白质隐匿某些化学物质，在很大程度上就象神经细胞释放神经传递素一样。

For instance, Fasshauer suspects M. brevicollis uses Munc18/syntaxin1 to secrete chemicals, much like neurons use it to release neurotransmitters.

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