Membrane transport proteins that transduce free energy stored in electrochemical ion gradients into a concentration gradient are a major class of membrane proteins. We report the crystal structure at ...

The tools of biochemistry have finally caught up with lactose repressor protein. US and Italian biologists this week offer new results about the oft-studied protein -- the first known genetic ...

Millions of Americans can’t digest a certain sugar in milk and milk products called lactose. If you’re one of them, you have lactose intolerance. The condition isn’t harmful, but it can be ...

Lactose permease (LacY) of Escherichia coli stands as a prototype of the major facilitator superfamily, employing the energy of a proton gradient to mediate the uptake of sugars against their ...