Vascular Endothelial Growth Factor 111 (flt1) Active Protein

Vascular endothelial growth factor (VEGF or VEGF-A), also known as vascular permeability factor (VPF), is a potent mediator of both angiogenesis and vasculogenesis in the fetus and adult (1-3). It is a member of the PDGF family that is characterized by the presence of eight conserved cysteine residues and a cystine knot structure (4). Humans normally express alternately spliced isoforms of 121, 145, 165, 183, 189, and 206aa in length (4). VEGF165 appears to be the most abundant and potent isoform, followed by VEGF121 and VEGF189 (3, 4). Additionally, an active ~18kD form, VEGF111, can be induced in tumor cells by treatment with genotoxic agents and ultraviolet (UV-B) irradiation (5). Like VEGF121, VEGF111 lacks the basic heparin-binding region encoded by exons 6 and 7, and is freely diffusible (4, 5). VEGF111 also lacks major proteolytic cleavage sites encoded by exon 5, giving it additional stability. Human VEGF111 shares 87% aa sequence identity with corresponding regions of mouse and rat VEGF, 93% with feline, equine and bovine VEGF, and 91%, 95% and 96% with ovine, canine and porcine VEGF, respectively. All VEGF forms bind the single pass receptor tyrosine kinases VEGF R1 (also called Flt-1) and VEGF R2 (Flk-1/KDR) on endothelial cells (4). Although VEGF affinity is highest for binding to VEGF R1, VEGF R2 appears to be the primary mediator of VEGF angiogenic activity (3, 4). VEGF is required during embryogenesis to regulate the proliferation, migration, and survival of endothelial cells (3, 4). In adults, VEGF functions mainly in wound healing and in female during reproductive cycle (3). Pathologically, it is involved in tumor angiogenesis and vascular leakage (6, 7).

Small volumes of flt1 active protein vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.

MBS651044 is an active protein targeting flt1. Also known as Vascular Endothelial Growth Factor 111, Recombinant, Human (Vascular Endothelial Growth Factor A, VEGFA, VEGF-A, VEG, Vascular Permeability Factor, VPF).