Histones

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In order for DNA to be packaged tightly enough to fit into a chromosome, it wraps around proteins called Histones, located in the nucleus of a cell.

Histones can be organized into six classes:

1.H1

2.H2A

3.H2B

4.H3

5.H4

6. Archael

Witout histones, DNA would be too long to fit within the nucleus.

Some other functions of histones include acetlyation, methylation, ubiquitination, and phosphorylation[1].

References

  1. ↑ http://www.iscid.org/encyclopedia/Histones
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