Piwi-interacting RNAs piRNAs Piwi-interacting RNAs piwi-interacting RNA piRNA Piwi-interacting RNAs piwi-interacting RNAs English Piwi-interacting RNAs Piwi-interacting RNAs piwi-РНК piRNA piRNA RNA molecule English piwi-Ð ÐÐ piwi-interacting RNA http://en.wikipedia.org/wiki/Piwi-interacting_RNA English Piwi-piRNA pathway piRNA Piwi-interacting RNAs piRNA