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Importance of Heterochromatin in DNA

We know that heterochromatin is part of DNA that is more condense and consists of repeats of DNA, in addition we also know that transcriptionally it is inactive part of DNA. In eukaryotes, condensing chromosomal DNA into heterochromatin is important for gene silencing and proper chromosome segregation. A recent study suggests a function for heterochromatin in protecting highly repeated genes and satellite DNA against excision caused by recombination or by joining of free DNA ends following DNA damage.
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Aftab Ahmad