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.
The Bolshoi is a repertory theatre, meaning that it draws from a list of productions, any one of which may be performed on a given evening. It normally introduces two to four new ballet or opera productions each season and puts a similar number on hold.