<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A modified version of Vitaxin, a humanized monoclonal IgG1 antibody to alpha(v)beta(3)integrin. Exhibiting improved affinity to alpha(v)beta(3)integrin compared to first-generation Vitaxin, Vitaxin-2 blocks the binding of ligands, such as vitronectin, to alpha(v)beta(3) integrin, thereby inhibiting endothelial cell-cell interactions, endothelial cell-matrix interactions, and angiogenesis. (NCI04)</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>