In quick-freeze deep-etch preparations in which cells are slam frozen the pellicle and the plasma membrane tends to be flattened. The double rings are present but only the outer ring of IMPs stand out...

Views of a striated band linked to the epiplasm on the ridge slopes and the intermembrane space between the plasma membrane and alveolus space inside the alveolus. TEM taken on 6/6/91 by C. Schroeder ...

Views of a striated band linked to the epiplasm on the ridge slopes and the intermembrane space between the plasma membrane and alveolus space inside the alveolus. TEM taken on 6/6/91 by C. Schroeder ...

A view of cortical fibers except the observer is looking at a cross-sectioned cell as though from anterior toward the posterior end of the cell; in this view the kd sections are seen on the left side ...

Freeze fracture image of the surface ridges at the anterior end of the cell where kineties to the right and left sides come together at an angle at the anterior suture tip. In this area are numerous p...

A high magnification view of the above septum in planar view and the septal pores that connect adjacent alveoli. The pores always lie next to the junction of the septum with the outer alveolar membran...

A high magnification view of the above septum in planar view and the septal pores that connect adjacent alveoli. The pores always lie next to the junction of the septum with the outer alveolar membran...

Striated band spanning the base of a longitudinal ridge (kinetodesmal fibers are seen in the ridge in cross section). The epiplasm appears absent from the top of the ridge or is replaced by two thicke...

A higher magnification view that shows the bilayer nature of the ciliary membrane, plasma membrane and the outer and inner (alveolar sac membranes of the alveoli. The 9-doublet + 2-singlet microtubula...

Longitudinal section of a striated band lying superficially to an arm of the infraciliary lattice but not contacting it. A post is seen at the junction of a branch in the infraciliary lattice. TEM tak...