Recombinant Human VEGF R2/KDR/Flk-1 Fc Chimera (Catalog # 357-KD) under non-reducing conditions only. It is recommended to use Goat Anti-Human VEGF R2/KDR/Flk‑1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF357)
Please Note: Optimal dilutions should be determined by each laboratory for each application.
are available in the Technical Information section on our website.
VEGF R2/KDR/Flk‑1 in Human Placenta.
VEGF R2/KDR/Flk‑1 was detected in immersion fixed paraffin-embedded sections of human placenta using 25 µg/mL Human VEGF R2/KDR/Flk‑1 Monoclonal Antibody (Catalog # MAB3571) overnight at 4 °C. Tissue was stained with the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
VEGF R2/KDR/Flk‑1 in Human Kidney.
VEGF R2/KDR/Flk‑1 was detected in immersion fixed paraffin-embedded sections of human kidney array using Human VEGF R2/KDR/Flk‑1 Monoclonal Antibody (Catalog # MAB3571) at 15 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). Lower panel shows a lack of labeling if primary antibodies are omitted and tissue is stained only with secondary antibody followed by incubation with detection reagents. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
VEGF R2/KDR/Flk‑1 in HUVECs and Human HeLa Cell Line.
VEGF R2/KDR/Flk‑1 was detected in immersion fixed human umbilical vein endothelial cells (HUVECs; left panel) but is not detected in Hela human cervical epithelial carcinoma cell line (right panel) using Mouse Anti-Human VEGF R2/KDR/Flk‑1 Monoclonal Antibody (Catalog # MAB3571) at 8 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Mouse IgG Secondary Antibody (red; Catalog # NL007) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm of HUVECs. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.
Preparation and Storage
Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: VEGF R2/KDR/Flk-1
VEGF R2 (KDR/Flk-1), VEGF R1 (Flt-1), and VEGF R3 (Flt-4) belong to the class III subfamily of receptor tyrosine kinases (RTKs). All three receptors contain seven immunoglobulin-like repeats in their extracellular domains and kinase insert domains in their intracellular regions. The expression of VEGF R1, 2, and 3 is almost exclusively restricted to the endothelial cells. These receptors are likely to play essential roles in vasculogenesis and angiogenesis.
VEGF R2 cDNA encodes a 1356 amino acid (aa) residue precursor protein with a 19 aa residue signal peptide. Mature VEGF R2 is composed of a 745 aa residue extracellular domain, a 25 aa residue transmembrane domain and a 567 aa residue cytoplasmic domain. In contrast to VEGF R1 which binds both PlGF and VEGF with high affinity, VEGF R2 binds VEGF but not PlGF with high affinity. The recombinant soluble VEGF R2/Fc chimera binds VEGF with high affinity and is a potent VEGF antagonist.
Ferra, N. and R. Davis-Smyth (1997) Endocrine Reviews 18:4.
R&D Systems personnel manually curate a database that contains references using R&D Systems products.
The data collected includes not only links to publications in PubMed,
but also provides information about sample types, species, and experimental conditions.
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