- DDP1, a single-stranded nucleic acid-binding protein of Drosophila, associates with pericentric heterochromatin and is functionally homologous to the yeast Scp160p, which is involved in the control of cell ploidy. Cortés, A., Huertas, D., Fanti, L., Pimpinelli, S., Marsellach, F.X., Piña, B., Azorín, F. EMBO J. (1999)