NCBI Organism:Felis catus; Cell Types:CNS neuron (sensu Vertebrata) Cell Components:nucleolus, Barr body, nuclear chromatin, Barr body; Biological process:nucleus organization, RNA metabolic process, nucleolus organization;

Licensing

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

CIL:11830^* Cite

Description

Transmission electron micrograph showing the inactive X chromosome (labeled Sex Chromatin), and also known as the Barr body, adpressed to the nucleolus in this section through the nucleus of a spinal cord neuron from a female cat. The inactive X chromosome is typically highly condensed, in keeping with the observation that it is largely inactive in transcription.

Technical Details

Originally from S. Palay (1976), The Fine Structure of the Nervous System, reprinted with permission as Figure 136 from Chapter 4 (Nucleus) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. A PDF copy of the corresponding chapter is available on the ASCB's BioEDUCATE website.

Biological Sources

NCBI Organism Classification: Felis catus
Cell Type: CNS neuron (sensu Vertebrata)
Cellular Component: nucleolus; Barr body; nuclear chromatin; Barr body

Biological Context

Biological Process: nucleus organization; RNA metabolic process; nucleolus organization

Attribution

Names: Sanford Palay; Don W. Fawcett
Published: ISBN 0721635849
Published: from: Don W. Fawcett M.D ‘The Cell’ 2nd edition, W.B. Saunders Chapter 4 (Nucleus)
Link: ASCB BioEDUCATE Program

Citation

Digital Object Identifier (DOI): doi:10.7295/W9CIL11830
Archival Resource Key (ARK): ark:/b7295/w9cil11830

Grouping This image is part of a group.

Imaging

Image Type: film
Image Mode: transmission electron microscopy (TEM); detection of electrons
Parameters Imaged: electron density
Source of Contrast: differences in adsorption or binding of stain
Visualization Methods: uranyl salt; osmium tetroxide; lead salt
Processing History: Image extracted from .pdf file of 'The Cell'
Data Qualifiers: processed data

Sample Preparation

Methods: tissue in plastic embedment; osmium tetroxide fixed tissue
Relation To Intact Cell: microtome-sectioned tissue

Dimensions

Spatial Axis	Image Size	Pixel Size
X	865px	——
Y	1245px	——