Figure 2. Gap junctions in the outer young cortical fibers (0-400 μm from the surface). A: Both small (arrows) and newly-formed gap junctions (opened arrows) in very superficial cells display loosely-packed connexons. B & C: Several larger gap junction plaques in slightly deeper cells also exhibit loosely-packed connexons. In the images, pf is the P face of the membrane and ef is the E face of the membrane. The scale bars indicate 200 nm.