The proteins contained in chromatin are called histones. Histones are a type of alkaline proteins found in the nuclei of eukaryotic cells that form the structure that packages DNA strands.
Histones are the main proteins found in chromatin, which is a combination of both protein and DNA and makes up the cell nucleus' contents. DNA uses the histones as a structure to wrap around, making histones important to the regulation of genes.
Histones are grouped into five families, and a single DNA strand wraps 1.65 times around one type of histones, known as the core histones. When histones interact, high-order structures form.