Nucleosome (IMAGE)

University of Illinois at Urbana-Champaign, News Bureau

Nucleosome

Caption

The cell's genetic material, DNA, is packaged into tightly wound structures called nucleosomes. The DNA (red) is wound around two sets of core histone proteins (green) to form a kind of bead on a string. The H1 histone protein clamps the DNA into place where it enters and exits a bead. There are well over a million nucleosomes in the nucleus of a cell.

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