Tags: Protein.
In biology histones are highly alkaline proteins found in eukaryotic cell nuclei that package and order the DNA into structural units called nucleosomes. They are the chief protein components of chromatin acting as spools around which DNA winds and play a role in gene regulation. Without histones the unwound DNA in chromosomes would be very long (a length to width ratio of more than 10 million to 1 in human DNA).
