Histones are proteins that are responsible for packaging DNA into structures called nucleosomes. Nucleosomes are the basic units of chromatin, which is the material that makes up chromosomes. Histones help to organize the DNA in the nucleus by wrapping it around themselves and forming a compact structure. This structure allows the DNA to be more efficiently stored and transcribed.

Nuclear lamina

The nuclear lamina is a network of proteins that lines the inside of the nuclear membrane. It helps to maintain the shape of the nucleus and provides a framework for the organization of the nuclear contents.

Nuclear matrix

The nuclear matrix is a complex structure that is composed of proteins, RNA, and DNA. It is thought to play a role in organizing the nucleus and regulating gene expression.

Nuclear pore complexes

Nuclear pore complexes are large protein structures that allow the movement of molecules between the nucleus and the cytoplasm. They help to regulate the transport of materials into and out of the nucleus.