Second part of chromosome eductional series

in study •  7 years ago 

hey steemians

what is unit of chromosome.
....."Nucleosome"!!!!!!

Nucleosome:
The basic unit of chromosome.

Composition Of Nucleosome
A nucleosome is composed of a histone octamer ,two turns of DNA helix and binding h1 proein.
image

Structure Of Nucleosome
the histone cotamer conatins four histone proteins H2A,H2B,H3,H4 those are placed on front side and are again present on backside these 4 makes eight "The octamer" and the DNA twists around octamer twice and runs out. There is another type of histone protien called H1 protein that bindes the DNA and the histone octamer.
THANKS AND ENJOY

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