Abstract
Chromatin insulators have been proposed to play an important role in chromosome organization and local regulatory interactions. In Drosophila , one of these insulators is known as Wari. It is located immediately downstream of the 3' end of the white transcription unit. Wari has been proposed to interact with the white promoter region, thereby facilitating recycling of the RNA polymerase machinery. We have tested this model by deleting the Wari insulator at the endogenous white locus and could not detect a significant effect on eye pigmentation.
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