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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 ——