In vivo mapping of the functional regions of the DEAD-box helicase Vasa
The maternally expressed Drosophila melanogaster DEAD-box helicase Vasa (Vas) is necessary for many cellular and developmental processes, including specification of primordial germ cells (pole cells), posterior patterning of the embryo, piRNA-mediated repression of transposon-encoded mRNAs, translational activation Skin Care of gurken (grk) mRNA, a