There are over 300 types of ion channels in a living cell.

Ion channels can be classified by how they respond to their environment.

The ion channels, he and his colleagues found, do not close tightly enough.

Ion channels are present in the membranes of all cells.

In the search for new drugs, ion channels are a frequent target.

Tip links pull on the ion channels to open them up.

Ion channels are common in mammals, and presumably other animals, as well.

Now, if this ion channel is blocked, there can be no fertilization.

Every cell has 20 to 40 types of ion channel that help it communicate and function.