VEGF R2/KDR/Flk-1 Antibody [FITC]


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Product Details

Reactivity Hu, HaSpecies Glossary
Applications WB
Please see the vial label for concentration. If unlisted please contact technical services.

VEGF R2/KDR/Flk-1 Antibody [FITC] Summary

A synthetic peptide made to a C-terminal region of the mouse VEGF Receptor 2 protein (between residues 1300-1367). [Swiss-Prot# P35918]
Type I membrane protein
Endothelial Cell Marker
This has only been shown to recognize the native form (180-190 kDa protein) of VEGFR-2, known as Flk-1 / KDR / VEGFR 2 (Vascular Endothelial Growth Factor Receptor 2), though it was raised against the precursor form.
Predicted Species
Mouse (100%)
Immunogen affinity purified
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Packaging, Storage & Formulations

Store at 4C in the dark.
FITC (A=495, E=519)
0.05% Sodium Azide
Please see the vial label for concentration. If unlisted please contact technical services.
Immunogen affinity purified


Application Notes
This VEGF Receptor 2 antibody is useful for Immunocytochemistry/Immunofluorescence and Western blot, where a doublet is seen at ~150 kDa with CSF-1R/VEGFR2 chimera transfected lysates representing VEGFR-2. A non-specific band is also seen at ~85 kDa. In ICC/IF punctate membrane staining was observed in Hela cells.

The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Theoretical MW
150 kDa

Reactivity Notes

Human. Predicted to react with mouse based on 100% sequence homology. Immunogen sequence has 79% homology to rat. Hamster reactivity reported in scientific literature (PMID: 23763710)

Alternate Names for VEGF R2/KDR/Flk-1 Antibody [FITC]

  • CD309 antigen
  • CD309
  • EC 2.7.10
  • EC
  • Fetal liver kinase 1
  • fetal liver kinase-1
  • Flk1
  • Flk-1
  • FLK1tyrosine kinase growth factor receptor
  • KDR
  • kinase insert domain receptor (a type III receptor tyrosine kinase)
  • Kinase insert domain receptor
  • Protein-tyrosine kinase receptor flk-1
  • soluble VEGFR2
  • vascular endothelial growth factor receptor 2
  • VEGFR2
  • VEGFR-2


VEGFs such as VEGFA, VEGFC, VEGFD etc. activate RTKs namely VEGFR-1 (Flt-1), VEGFR-2 (KDR/Flk-1), and VEGFR-3 (Flt-4), that regulates angiogenic as well as lymphangiogenic transduction signals. VEGF Receptor 2 (VEGFR2) is the most prominent cell-surface receptor for VEGF ligands and binding of VEGFs to isoform 1 leads to multiple signaling cascades activation. PLCG1 activation results in production of signaling molecules (diacylglycerol, inositol 1,4,5-trisphosphate etc) and PKC activation. VEGFR2 is involved in the activation of MAPK1/ERK2, MAPK3/ERK1, and MAPK as well as AKT signaling pathways. It facilitates phosphorylation of PIK3R1 (regulatory subunit of PI3K), cytoskeletal actin reorganization and PTK2/FAK1 activation. VEGFR2 is essential for VEGFA-mediated induction of NOS2/NOS3, leading to the production of NO by endothelial cells and is involved in phosphorylation of FYN, NCK1, NOS3, PIK3R1 and SRC. Isoforms -2 and -3 function as decoy receptors for VEGFs, and isoform -2 plays as negative regulator of VEGFA/VEGFC-mediated lymphangiogenesis by limiting free VEGFA and/or VEGFC levels alongwith preventing their binding to VEGFR3. Versatile signaling effects by VEGFR2 leads to its regulatory role in processes such as angiogenesis, vascular development, vascular permeability, embryonic hematopoiesis, and promotes proliferation, survival, migration and differentiation of endothelial cells alongwith facilitating reorganization of the actin cytoskeleton.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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WB Video Protocol

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Secondary Antibodies


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Blogs on VEGF R2/KDR/Flk-1.

HIF-3 alpha: a versatile target with hypoxia dependent and independent functions
By: Subhash GangarHIF-3 alpha (hypoxia-inducible factor 3-alpha/ HIF3A) represents an isoform of HIF-alpha subunits which heterodimerize with stable beta subunit (HIF-beta) for the regulation of HIF target genes through binding to hypoxia respon...  Read full blog post.

VEGFR-2 - A highly active kinase
VEGFR-2 is a family member of the vascular endothelial growth factor (VEGF) family of membrane receptor tyrosine kinases. It is a key regulator of the process of angiogenesis that takes place during fundamental developmental processes such as embry...  Read full blog post.

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Product PDFs


Gene Symbol KDR

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