Purity >95% by SDS-PAGE, MW: 28.4 kDa. Vascular Endothelial Growth Factor-120 comes as a dimer having a 121/242 amino acid chain. Vascular endothelial growth factor-A (VEGF-A) is produced by a wide variety of cell types, including tumor and vascular cells. VEGF-A is a mediator of vascular growth, vascular permeability, and plays a role in stimulating vasodilation via nitric oxide-dependent pathways. Mouse VEGF-A has several alternatively spliced isoforms, with one being VEGF-120. VEGF-120 is an angiogenic factor that is expressed throughout endochondral bone development and is important during skeletogenesis.