Here's a breakdown:

* DNA: The genetic material that contains the instructions for building and maintaining an organism.

* Protein: Various proteins, including histones, play a crucial role in organizing and packaging DNA within the nucleus of a cell.

* Chromatin: The complex formed by the association of DNA and proteins, primarily histones.

Chromatin exists in different states, depending on the level of compaction. These states influence gene expression and other cellular processes.