Constitutive expression of the urokinase plasminogen activator gene in murine Raw264 macrophages involves distal and 5’ non-coding sequences that are conserved between mouse and pig. - Cassady, AI; Stacey, KJ; Nimmo, KA; Murphy, KM; Von der Ahe, D; Pearson, D; Botteri, FM; Nagamine, Y; Hume, DA (Nucleic Acids Res, 1991)