A pegylated, proprietary lipocalin that targets human vascular endothelial growth factor (VEGF), with potential antineoplastic activity. Pegylated anti-VEGF anticalin PRS-050 specifically targets and binds to VEGF receptor 2 (VEGFR2 or KDR), thereby preventing its activity. This may inhibit angiogenesis and eventually reduce tumor cell growth. Check foractive clinical trials using this agent.