Question: the nicotinic acetylcholine receptor is a cation channel in the...
The nicotinic acetylcholine receptor is a cation channel in the plasma membrane of some neurons. It is composed of five subunits, each of which is a transmembrane protein. The hydropathy plot of one of the subunit is shown. How many membrane-spanning alpha helices do you predict for this protein subunit? The hydropathy index shows DeltaG (hydrophobic --> water).
The plasma membrane of a neuron is 3.5 nm thick.