出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/01/23 16:22 UTC 版)
The permeases are membrane transport proteins, a class of multipass transmembrane proteins that facilitate the diffusion of a specific molecule in or out of the cell by passive transport. In contrast, active transporters couple molecule transmembrane transport with an energy source such as ATP or a favorable ion gradient.