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*CIL – Cell Image Library accession number. Please use this to reference an image.

CIL:36693*  Cite 

A more extensive freeze-fracture view of the membranelles on the left side of the buccal cavity. Fractures of eighty or more basal bodies can be counted in each of the dorsal three rows of the dorsal peniculus. The fracture plane jumps down into the cilia for most of the ventral peniculus and only a short segment of the quadrulus next to the cytopharynx is exposed in this fracture plane. The ventral peniculus ends where the quadrulus approaches the dorsal peniculus and the ventral row of the dorsal peniculus ends about eleven cilia posterior to this. Only the quadrulus extends to the end of the buccal cavity (not shown). TEM taken on 12/15/75 by R. Allen with Hitachi HU11A operating at 75kV. Neg. 3,000X. Bar = 2µm.

Biological Sources
NCBI Organism Classification
Paramecium multimicronucleatum
Cell Type
cell by organism
eukaryotic cell
Eukaryotic Protist
Ciliated Protist
Cellular Component
oral apparatus
microtubule basal body
Biological Context
Biological Process
oral apparatus organization
Richard Allen (University of Hawaii)
Digital Object Identifier (DOI)
Archival Resource Key (ARK)
Image Type
transmission electron microscopy (TEM)
illumination by electrons
Image Mode
electron density
Parameters Imaged
elastic scattering of electrons
electron density
Source of Contrast
differences in deposition of metal shadow
Visualization Methods
transmission electron microscopy (TEM)
Processing History
shadowing and plating
recorded image
Print of negative scanned for Photoshop
Data Qualifiers
processed data
Spatial Axis Image Size Pixel Size
X 3013px ——
Y 3485px ——