A DNA sequence for the gene therapy of tumors is described. In its essential elements, the DNA sequence is composed of an activator sequence, a promoter module and a gene for the active substance. The activator sequence is activated, in a cell-specific manner, in proliferating endothelial...http://www.google.com/patents/US5830880?utm_source=gb-gplus-sharePatent US5830880 - Gene therapy of tumors with an endothelial cell-specific, cell cycle-dependent active compound 
