1. Woodcock stated that chromatin appears as a chromatin beads.
2. These beads like structure were referred to as nucleosome.
3. This nucleosome is composed of DNA and histone proteins.
4. The central core is made up core histones H2A, H2B, H3, and H4.
5. Core particles are attached by linker DNA.
6. Linker DNA is 80 bp long.