The present invention is a composition identified as a region of ralA binding protein 1, wherein the region neighbors a membrane-associated portion of the ralA binding protein 1, reduces transport activity and membrane association of the ralA binding protein 1 and kills cells undergoing uncontrolled cell growth in a subject that has cells undergoing uncontrolled cell growth. The region is used to generate medicines that kill malignant cells and tumorigenic cells. Medicines may be in the form of antibodies, si-RNA and small molecules that recognize the region.