所有的离子通道都是仅对某一种离子具有选择性的，而我们可以来想一想这种选择性是如何发生的，这也就是原子半径这个概念将会变得，非常重要的地方。
And all ion channels are selective for a single type of ion, and we can think about how that selectivity takes place, and that's where this idea of atomic radius is going to become very important.
这些离子通道都有的一部分，就是所谓的选择性过滤器，这个过滤器，会滤过允许穿过的离子。
What all of these channels have is what's called a selectivity filter, so this filter filters out the type of ion that's going to be allowed through.
但是，当闸门打开的时候，钠离子通道，将会有极高的选择性，不允许除钠离子以外的任何其它离子通过。
However, when that gate is opened, the sodium channel is now going to be incredibly selective and only let through sodium ions and no other type of ion.
在这一模型中，离子通道的选择性过滤器主要处于三个态，一个三离子态和两个两离子态，转导过程用这三个态之间的相互跃迁来描述。
In this model, ion conduction involves transitions of three states, with one three-ion state and two two-ion states in the selectivity filter respectively.
绝大多数TRP离子通道为非电压依赖性、非选择性阳离子通道。
Most of the TRP channels are voltage independent and non selective cation channels.
绝大多数TRP离子通道为非电压依赖性、非选择性阳离子通道。
Most of the TRP channels are voltage independent and non selective cation channels.
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