Quick-freeze deep-etch of granulo-fibrillar material at the crests of the ridges. This material is composed of thinner and shorter filaments that, like the striated bands, appear to bind to the membrane. The fracture plane also exposed the cell’s exterior. TEM taken on 6/4/91 by C. Schroeder with Zeiss 10A operating at 80kV. Neg. 19,800X. Bar = 0.25µm. There is a high resolution version of this image in the library (CIL:39321) which is available for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).