Does each type of membrane have a different membrane potential? I'm especially interested in answers that can cite academic papers that have attempted to measure membrane potentials.
I've asked about the composition of membranes before , and although I recieved some information, I didn't get all the information I was after. This isn't a problem with our community but rather with the field at large: the popular thinking is membranes are membranes are membranes (mostly due to the difficulties in studying membrane biophysics experimentally).
This is how wikipedia defines membrane potential:
Membrane potential (also transmembrane potential or membrane voltage) is the difference in electric potential between the interior and the exterior of a biological cell. - Wikipedia
This isn't strictly true. Intracellular membranes also have membrane potentials as one can imagine, and there is some unverified information regarding compartmental pH values. This is why I am interested to find out if there have been studies attempting to quantify this across the cell membrane, and across different subcellular membranes.