<qa>  What is the target of SU011248?- SU011248 is an exciting, new, experimental drug that inhibits a number of proteins, or more specifically receptor tyrosine kinases, in tumor cells. These proteins are active in cellular pathways that are important for development and growth of a variety of different cancers. The targets of SU011248 include the receptors for vascular endothelial growth factor VEGF, platelet-derived growth factor PDGF, and others. By blocking the VEGF and PDGF pathways, SU011248 can induce death of the blood vessels that nourish the cancer cells and death of the cancer cells themselves. 