OBC: Contents

Origin of exocrine pancreatic cells from nestin-positive precursors in developing mouse pancreas 15 Ce-Y14 and MAG-1, components of the exon–exon junction complex, are required for embryogenesis and germline sexual switching in Caenorhabditis elegans 27 H. Lee, P.N. Adler (USA) The grainy head transcription factor is essential for the function of the frizzled pathway in the Drosophila wing 37 The MADS-box transcription factor SrfA is required for actin cytoskeleton organization and spore coat stability during Dictyostelium sporulation 51 K. Somogyi, P. Rørth (Germany) Cortactin modulates cell migration and ring canal morphogenesis during Drosophila oogenesis 57 Programmed cell death and context dependent activation of the EGF pathway regulate gliogenesis in the Drosophila olfactory system 65 Zebrafish maternal-effect mutations causing cytokinesis defect without affecting mitosis or equatorial vasa deposition 79 Biogenesis and function of mouse mammary epithelium depends on the presence of functional α-catenin 91 Conserved and clustered RNA recognition sequences are a critical feature of signals directing RNA localization in Xenopus oocytes 101 Instructions to authors 111 MOD Checklist 115