What are histones? What are their functions?

Explanation

Histones are the basic group of globular proteins that have a high content of basic amino acis, i.e., arginine and lysine. Histones forms the part of the chromosomal material in eukaryotic cells.
There are five types of histone proteins `H_(1), H_(2)A, H_(2)B, H_(3)" and "H_(4).` Four of them `(H_(2)A, H_(2)B, H_(3)" and "H_(4))` occur in pairs to produce histone octamer called Nubody or core of nucleosome.
Functions Histones bear positively charged ends, that attaract negetively charged strands of DNA.
Histones provides a medium around which DNA winds, and they play a vital role in gene regulation, as they act as gene repressor. They form the chromatin material and provide stability as are not coagulated by heat.