Histones play a role in packaging DNA into nucleosomes, and they are the main protein in chromatin. In addition, gene expression can be regulated by histones. Genes that are silenced are bound very tightly to a lot of histones, while those that are active are not. Modifications to histones are referred to as the histone code.
Definition of bolshevism. 1 : the doctrine or program of the Bolsheviks advocating violent overthrow of capitalism.
A member of the Russian Social Democratic Workers' Party that seized power in that country in November 1917. c. A member of a Marxist-Leninist party or a supporter of one; a Communist. often bolshevik An extreme radical: a literary bolshevik. In all senses also called Bolshevist.