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Sunday, January 13, 2013 Erin Kelleher and Dan Barbash found that Drosophila hybrids have increased transposon activity due to the rapid evolution of proteins in the piRNA pathway. piRNAs act to repress transposons, and while piRNA transcripts are still made in the interspecific hybrids, they are not processed to their mature, functional forms. More details can be found in their PLOS Biology paper here. |