Part 2.Genome AnatomiesChapter 7. Eukaryotic nucleargenomesChapter 8. Genomes of prokaryotesand eukaryotic organellesChapter 9. virus genomes and mobilegenetic elements
Part 2. Genome Anatomies Chapter 7. Eukaryotic nuclear genomes Chapter 8. Genomes of prokaryotes and eukaryotic organelles Chapter 9. virus genomes and mobile genetic elements
Chapter 7. Eukaryotic nucleargenomes
Chapter 7. Eukaryotic nuclear genomes
7.1. Nuclear genomes arecontained in chromosomesChromosome number is unrelated to biologicalfeatures of the organism. Yeast (16), fruit fly(4).Nor is chromosome number linked to genome size(some salamanders have genomes 30 timesbigger than human but about half the number ofchromosomes)How do chromosome number change?AnunexpectedwaySaccharomyces cerevisiae (budding yeast, brewer's yeastdistiller's yeast or wine yeast,)Schizosaccharomyces pombe (fission yeast)
7.1. Nuclear genomes are contained in chromosomes Chromosome number is unrelated to biological features of the organism. Yeast (16), fruit fly(4). Nor is chromosome number linked to genome size (some salamanders have genomes 30 times bigger than human but about half the number of chromosomes) How do chromosome number change? An unexpected way. Saccharomyces cerevisiae (budding yeast, brewer’s yeast, distiller’s yeast or wine yeast, ) Schizosaccharomyces pombe (fission yeast)
7.1.1 Packaging of DNA into chromosomePurified chromatinProteincomplexDNANucleasetreatmentNucleasetreatment-limitingconditionsnonlimitingconditionsDegradeprotein,analyzeDNAbygelelectrophoresisLANE1:DNAmarkers40obp..LANE2:Bandsof2o0bp,4o0bpetc.20obp..146bp.LANE3:Singlebandof146bp
7.1.1 Packaging of DNA into chromosome
Nucleosome and higher level package(A)Thesolenoid(B)Thehelical(A)modelribbonmodelDNA(B)Nucleosomes(C)Linkerhistone
Nucleosome and higher level package