The largest accumulation of endosomal vesicles and early endosomes is next to the buccal cavity area under the membranelles of the peniculi and quadrulus. Cilia of the peniculi have a very close packing but have only three rows of parasomal sacs, two rows on the two margins of the light rows of cilia and a third row down the middle of the eight ciliary rows separating the dorsal from the ventral peniculi. Early endosomes have smooth membranes except for their clathrin coated evaginations waiting to be pinched off. In this micrograph most membranes are uncoated. Two tangentially fractured basal bodies showing the globular masses seen in thin sections in their shafts are embedded in strands of the meshwork of the filamentous reticulum. Only one cilium shows the P-fracture face of the ciliary membrane, all others appear not to have been fractured. Rings of IMPs or transmembrane particles are seen at ciliary bases. TEM taken on 6/4/91 by R. Allen with Zeiss 10A operating at 80kV. Neg. 19,800X. Bar = 0.25µm. A print of the negative was scanned and processed in Photoshop. This image is best used for qualitative analysis. A high resolution image (CIL:12635) is available for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).
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