Skip to main content

Part of the book series: Topics in Molecular and Structural Biology ((TMSB))

Abstract

The structure of DNA in its functional state in cells is modified by protein binding and the introduction of superhelix density. Whilst this is probably true for most natural DNA molecules, it is especially so for eukaryotic DNA, where an at least equal weight of protein serves to contract about one metre of nucleic acid by approximately five orders of magnitude. Typically, a human somatic cell contains about one thousand times the amount of DNA present in prokaryotic cells, where it is condensed into a nucleus of diameter 5 µm whilst allowing access to the enzymes involved in all aspects of nucleic acid metabolism. In eukaryotes discrete DNA molecules of between 104 to 106 kilobase pairs (Kb) in length are organised by protein into morphologically and genetically distinct units called chromosomes. The nucleoprotein material of which they are composed is generally called chromatin.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

Download references

Authors

Editor information

Editors and Affiliations

Copyright information

© 1981 The Contributors

About this chapter

Cite this chapter

Lilley, D.M.J. (1981). Eukaryotic chromatin. In: Neidle, S. (eds) Topics in Nucleic Acid Structure. Topics in Molecular and Structural Biology. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-04691-1_7

Download citation

Publish with us

Policies and ethics