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Packaging DNA T G A Histone C octomer Histone proteins 2 nm
T A G C C G TA T A G C C G G C T A A T Packaging DNA Histone proteins Histone octomer 2 nm B DNA Helix
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Packaging DNA T G A Histone C G C octomer Histone proteins 2 nm
TA G C T A C G A T A T 2 nm C G B DNA Helix G C T A
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Packaging DNA T G A 11 nm Histone C G C octomer Histone proteins
TA G C T A C G Nucleosome A T A T 2 nm C G B DNA Helix G C T A
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Packaging DNA A T T A G C C G C G G C T A A T
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Packaging DNA A T T A G C C G C G G C T A A T
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Packaging DNA “Beads on a string” 11 nm 30 nm Looped Domains 200 nm
A T T A G C C G C G G C T A A T 30 nm Looped Domains 200 nm Tight helical fiber Protein scaffold
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Packaging DNA 11 nm 30 nm 200 nm 2 nm 700 nm Metaphase Chromosome
Looped Domains Nucleosomes B DNA Helix Tight helical fiber 700 nm G C A T Metaphase Chromosome Protein scaffold
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Chromosomes, Chromatids and Centromeres
A packaged chromosome Chromatid Identical chromatid Replication Anaphase Chromosome arm Two identical chromosomes Centromere Chromosome arm
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Packaging DNA T G A Histone C G C octomer Histone proteins B DNA Helix
TA G C T A C G A T A T C G B DNA Helix G C T A
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“Beads on a string” Looped Domains Tight helical fiber
A T T A G C C G C G G C T A A T Looped Domains Tight helical fiber Protein scaffold
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Metaphase Chromosome Protein scaffold Nucleosomes Looped Domains
B DNA Helix Tight helical fiber G C A T Metaphase Chromosome Protein scaffold
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