A new study published in the journal Science reveals insights into how genes become active at just the right time and location during the development of the fly embryo. The study, conducted by researchers in the lab of Michael Levine (Princeton’s Anthony B. Evnin '62 Professor in Genomics and professor of molecular biology) describes two classes of elements at work: one that brings together distant regions of the genome, and another that ensures the specificity of interactions.

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