ABSTRACT Piwi-interacting RNAs (piRNAs) are a class of small RNAs primarily responsible for silencing transposons in the animal germ line. The ping-pong cycle. the posttranscriptional silencing branch of the piRNA pathway. relies on piRNAs produced from endogenous transposon remnants to direct cleavage of transposon RNA via association with Piwi-family Argonaute proteins. https://www.getpureroutine.com/special-pick-aus-309-darwin-to-penguin-shoal-fashion-great-offer/