Faint gray bands in Drosophila melanogaster polytene chromosomes are formed by coding sequences of housekeeping genes

In Drosophila melanogaster , the chromatin of interphase polytene chromosomes appears as alternating decondensed interbands and dense black or thin gray bands. Recently, we uncovered four principle chromatin states (4НММ model) in the fruit fly, and these were matched to the structures observed in p...

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