Genes & Chromosomes Compaction of DNA Supercoiling Relaxed.

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Presentation transcript:

Genes & Chromosomes Compaction of DNA Supercoiling Relaxed

Genes & Chromosomes Size of genome vs. size of cell

Genes & Chromosomes Compaction of DNA

Genes & Chromosomes Compaction of DNA 30 nm fiber

Genes & Chromosomes Compaction of DNA Beads-on-a-string Protein (histones, basic) + DNA (acidic) = Nucleosome

Genes & Chromosomes Compaction of DNA Beads-on-a-string

Genes & Chromosomes Compaction of DNA Topoisomerases can underwind and/or relax DNA Important for DNA packaging, DNA replication

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