Angiostatin K1-3 is a ~30 kDa fragment of plasminogen that has been shown to act as a potent inhibitor of angiogenesis and tumor growth in vitro and in vivo. Recombinant angiostatin is expressed in E. coli. Synonym: Angiostatin K1-3, Human. Formulation: Lyophilized from a 0.2μm filtered concentrated solution in 20mM NaAc, pH5.5, 4% mannitol.