While biologists debate the idea that most noncoding RNA serves no real function in the genome, MIT's Manolis Kellis is busy finding function in the most unexpected places. In his latest work, he's located pairs of miRNAs expressed from the same double-stranded DNA that are both functional. "What we've found out now is that, in fact, for some miRNA genes, the antisense transcript gets processed into a mature miRNA, which itself has distinct functions," Kellis says. "Both directions of the DNA are coding for distinct functions."

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University of California, San Diego, researchers have developed a gene drive to control a fruit-destroying fly.

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