They will change shape in response to binding of their target molecule.
Channel opening is triggered by a specific stimulus such as the voltage or pH difference across the cell membrane. These channel are selective in the type of ions that can pass through its pore. When ion channels are in their open state, they conduct electrical current by allowing specific types of ions to pass through them.
Carrier proteins are proteins that bind to molecules or ions on one side of the membrane and release them on the other. Channel proteins create holes/pores that penetrate the membrane, enabling target molecules or ions to flow through via diffusion without interfering with one another.
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