When the chromatin is extended and viewed under a microscope, the structure resembles beads on a string. Each of these tiny beads is a called a nucleosome and has a diameter of approximately 11 nm.

DNA lesions are repaired by a cut-and-remove process called nucleotide excision repair ... on the DNA repair process (Mol Cell Biol 2000, 20:9173-9181). A nucleosome structure was assembled by mixing ...