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Polytene Chromosomes in Drosophila Melanogaster

Explore electron micrographs revealing the intricate structure of D. melanogaster's mitotic chromosomes, nucleosomes, and histones. Learn about DNA packaging models and the significance of histone acetylation in chromosome organization.

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Polytene Chromosomes in Drosophila Melanogaster

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  1. Polytene Chromosomes of D. melanogaster

  2. Electron Micrograph of a Single Chromatid of a Mitotic Chromosome

  3. Electron Micrographs of Chromatin Strands Before and After Treatment

  4. Micrococcal Nuclease Digestion of Chromatin

  5. Sedimentation of Nucleosomes

  6. Properties of Histones

  7. Histones Forming the Nucleosome

  8. Formation of Nucleosomes

  9. Two Models for Packing Nucleosomes into 30nm Fiber

  10. Hypothetical Model of Packaging DNA into Chromosomes

  11. Histone Acetylation and DEACETYLATION

  12. HistoneAcetylation and Histone Structure

  13. Number of Nucleotide Pairs Per Haploid Genome of Different Organisms

  14. Renaturation of DNA is a Second Order Reaction Integration:

  15. Reassociation Kinetics of Different DNAs

  16. Reassociation Kinetics of Eukaryotic DNA

  17. Sequence of Telomeric Ends of Different Organisms

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