Interaction of the MAGUK family member Acvrinp1 and the cytoplasmic domain of the Notch ligand Delta1 Sabine Pfister, Gerhard K. H. Przemeck, Josef-Karl Gerber, Johannes Beckers, Jerzy Adamski and Martin Hrabé de Angelis* GSF-National Research Center for Environment and Health, Institute of Experimental Genetics, Ingolstaedter Landstr. 1, D-85764 Neuherberg, Germany * Author for correspondence Tel.: +49-89-3187-3302 Fax: +49-89-3187-3500 Email: hrabe@gsf.de Running title: Interaction of Acvrinp1 and Dll1