BIOL3149 Study Guide - Quiz Guide: Lactose Permease, Antiporter, Symporter

• School: UNB
• Department: Biology
• Course: BIOL3149
• Professor: Edwards Jonathon

Document Summary

Lactose permease lacy is a transport protein that moves lactose inward, and is powered by a proton that is also moving inward. Lacy proton-driven transport is electrogenic coupled transport because an unequal distribution of charge results: lactose is neutral and a proton has a positive charge of 1. The charge of the cell is influenced, this is not ideal because we want the interior of the cell to be negatively charge relative to the exterior because atp-producing systems require an electrochemical gradient across the membrane. The na+/h+ antiporter is a membrane protein that couples the export of na+ with the import of a proton. Because the molecules are of like charges, there is no net movement of the charge, meaning this process is electroneutral. Alternately open one end or the other of a channel that spans the membrane. To form proton motive force that powers atp synthesis. Energy stored in atp can drive membrane transport nutrients.