Uniporter
（重定向自Uniport）
A uniporter is an integral membrane protein that is involved in facilitated diffusion. They can be either ion channels or carrier proteins.
Uniporter carrier proteins work by binding to one molecule of substrate at a time and transporting it with its concentration gradient. Uniporter channels open in response to a stimulus and allow the free flow of specific molecules. Both kinds of uniporters rely on passive transport, as they do not directly require cellular energy to function.