Classification of proteins identified in chromatin preparations.

This was accomplished according to (a.) their cellular location and (b.) their functional categorization. The white column corresponds to the total extraction of chromatin, while gray and black columns correspond to the salt extraction and total digestion of chromatin respectively. Preparation fractions (supernatant and pellet) were combined where applicable. Protein quantity refers to the percentage of proteins in each category with respect to the total number proteins found in each particular preparation.