polytene chromosome puffing

The decondensing (loosening) and swelling of the chromosomal sites of target genes on polytene chromosomes following response to a stimulus, to facilitate sudden bursts of transcriptional activity in response to transient environmental signals.

Source:http://purl.uniprot.org/go/0035079

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The decondensing (loosening) and swelling of the chromosomal sites of target genes on polytene chromosomes following response to a stimulus, to facilitate sudden bursts of transcriptional activity in response to transient environmental signals.
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polytene chromosome puffing
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