Nucleosome

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This is the structure of a nucleosome (Protein Data Bank structure 1P3I), determined by X-ray crystallography. A DNA double helix is wrapped around a cluster of 8 histone proteins.

Color scheme:

• Magenta & cyan = DNA
• Green & light green = 2 copies of histone H2A
• Yellow & light yellow = 2 copies of histone H2B
• Red & pink = 2 copies of histone H3
• Blue & light blue = 2 copies of histone H4

© by D. Eric Walters

This is the structure of a nucleosome (Protein Data Bank structure 1P3I), determined by X-ray crystallography. A DNA double helix is wrapped around a cluster of 8 histone proteins.

Color scheme:

• Magenta & cyan = DNA
• Green & light green = 2 copies of histone H2A
• Yellow & light yellow = 2 copies of histone H2B
• Red & pink = 2 copies of histone H3
• Blue & light blue = 2 copies of histone H4

© by D. Eric Walters