So this entire structure that transverses the membrane of one cell and the membrane of the adjacent cell, and also transverses this into cellular space. This is a single gap junction. So this is the cytoplasm of one cell and this is the cytoplasm of that adjacent cell. And the length of this gap junction is about 35 angstroms. And the final aspect, the final difference between the voltage gated and ligan gate channels and the gap junctions is that these iron channels are produced by single type of cell, but gap junctions are actually produced by two cells. And we'll see why in just a moment.