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

CIL:12307*  Cite 

Cytopharyngeal basket in tangential section is composed of a complex of microtubular rods. The lumen of the basket contains many vesicles called cytopharyngeal vesicles. They may provide membrane for the nascent food vacuole, lysosomal and/or lytic enzymes, or all of these. Another role may be to provide vacuolar type ATPases (proton pumps) to the nascent food vacuole. TEM taken on 3/13/69 by R. Allen with Philips 300 operating at 60kV. Neg. 3,570X. Bar = 2µm.

Technical Details

A print of the negative was scanned and processed in Photoshop. This image is best used for qualitative analysis. Standard glutaraldehyde fixation followed by osmium tetroxide, dehydrated in alcohol and embedded in an epoxy resin. Microtome sections prepared at approximately 75nm. There is a high resolution version of this image in the library (CIL:39128) which is available for quantitative analysis. Additional information available at (

Biological Sources
NCBI Organism Classification
Cell Type
cell by organism
eukaryotic cell
Eukaryotic Protist
Ciliated Protist
Cell Line
Cambridge Culture Collection, Cambridge, England, catalog # LB1650/1
Cellular Component
oral apparatus
microtubule associated complex
symbiont-containing vacuole
Biological Context
Biological Process
oral apparatus organization
microtubule bundle formation
bacterial symbiont interaction
Richard Allen
Digital Object Identifier (DOI)
Archival Resource Key (ARK)
Grouping This image is part of a group.
Image Type
transmission electron microscopy (TEM)
illumination by electrons
Image Mode
detection of electrons
Parameters Imaged
electron density
Source of Contrast
stain with broad specificity
Visualization Methods
stain with broad specificity
osmium tetroxide
uranyl salt
lead salt
Processing History
recorded image
Print from negative scanned for Photoshop
Data Qualifiers
processed data
suitable for spatial measurements
Spatial Axis Image Size Pixel Size
X 1847px ——
Y 2400px ——