The structure of the nucleosome core particle of chro- matin in chicken erythrocytes visualized by using atomic force microscopy

摘要

The structure of the nucleosome core particle of chro- matin in chicken erythrocytes has been examined by using AFM. The 146 bp of DNA wraped twice around the core Histone octamer are clearly visualized. Both the ends of Entry/exit of linker DNA are also demonstrated. The di- Mension of the nucleosome core particles is～1-4 nm in Height and～13-22 nm in width. In addition, superbeads (width of～48-57 nm, height of～2-3 nm)are occasionally revealed, two turns of DNA around the core particles are also detected.