Chromatin

Chromatin is a complex of DNA and proteins found in the nucleus of cells. It serves to package DNA into a more compact structure, allowing it to fit within the nucleus while also playing a crucial role in regulating gene expression. When chromatin is loosely packed, genes can be easily accessed and activated; when tightly packed, those genes are largely inactive. This organization is essential for processes like cell division, DNA replication, and repair. Overall, chromatin helps control how genes are used in the body, influencing everything from growth to responding to the environment.