Neuropilin-1 protein is a cell surface receptor that plays multiple roles in cardiovascular development, angiogenesis, and neuronal circuit formation. It mediates chemical repulsion by recognizing ligands with CendR motifs, leading to internalization and vascular leakage. Neuropilin-1 Protein, Rat (HEK293, His) is the recombinant rat-derived Neuropilin-1 protein, expressed by HEK293 , with C-6*His labeled tag and K811R, P812-G828 delet.