...Heidi Horowitz; Celeste A. Berg ABSTRACT Mutations at the pipsqueak locus affect early patterning in the Drosophila egg and embryo. We have cloned pipsqueak and found that it is a large and complex gene, encoding multiple transcripts and protein isoforms. One protein, PsqA, is absent in all...

...Vivian Siegel; Thomas A. Jongens; Lily Yeh Jan; Yuh Nung Jan ABSTRACT We have identified a new member of the posterior group of genes, which we call pipsqueak . We show that pipsqueak acts after the establishment of the oskar posterior anchor but before the localization of vasa protein during...