7.1 - heterochromatin • Ex mammalian X-chromosomes o...

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Chapter 7 eukaryotic Genomes Chromosomes are packaged o Needed to produce the high density f DNA in the interpahse nucleus and metaphase chromosomes o Need to orchestrate the accessibility of genes to replication and transcription proteins o During interphase the chromatin mass is divided into euchromatin and heterochromatin Heterochromatin can be transient called facultative
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Unformatted text preview: heterochromatin • Ex mammalian X-chromosomes o Basic chromatin unit Nucleosome- a 10 nm particle 146 bp DNA coiled around proteins called the core octamer Core octamer- 8 basic proteins 2 each of H2A, H2B H3 and H4 positively charged binds negative DNA Nucleosomes connected to form chains •...
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