To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 6A Serial section sequence of the small myelinated axon shown in Figure 6 (1.9 MB TIFF file). This sequence contains 19 sections (30 nm thick) imaged at 3 nm per pixel. Bar, 200 nm. Axonal endoplasmic reticulum is very narrow Mark Terasaki J Cell Sci 2018. 131:None-None; doi: 10.1242/jcs.210450 Download Original Video