...from studies in Drosophila. Investigation into oskar mRNA localization in the oocyte, which is essential for germ cell development in the embryo, has revealed a key role of the Exon Junction Complex (EJC) RNA transport. In contrast, in mammals the main role of the EJC shown to date is in RNA quality control, in nonsense-mediated decay (NMD) of mRNAs containing premature stop codons. However, recen ...