DescriptionAngiopoietin 1 and Angiopoietin 2 are important for development of the endothelium, by regulating tyrosine phosphorylation of the membrane receptor Tie 2. Angiopoietin 2 is only 60% homologous with Angiopoietin 1. Angiopoietin-2 is a naturally occurring antagonist of angiopoietin-1 that competes for binding to the TIE2 receptor and blocks ANGPT1-induced TIE2 autophosphorylation. Angiopoietin 1 binding to Tie 2 causes phosphorylation of the receptor. Angiopoietin 2 competes for this binding, and thus blocks receptor phosphorylation. Angiopoietin 2 expression occurs at sites of vascular remodelling: dorsal aorta and major aortic branches, ovary, placenta and uterus.Catalog NumberIW-PA1005Quantity9 mlHostRabbitClonePolyclonalIsotypeIgGImmunogenA synthetic peptide corresponding to a sequence mapping near the C-terminal of human angiopoietin-2, different from the related mouse sequence by two amino acids.PurityImmunogen affinity purifiedConjugateUnconjugatedSpecies ReactivityHuman, mouse, rat. Not tested in other species.Positive ControlPlacentaCellular LocalizationCytoplasmicFormReady to use solution in PBS with stabilizer and 0.01% sodium azide. No further dilution needed. Serum blocking step should be omitted.StorageStore at 2-8 °C. Do not freeze.ApplicationsIHC-P: Heat induced epitope retrieval is required on formalin fixed paraffin sections. IHC-Tek Epitope Retrieval Solution (IW-1100) is recommended.IHC-Fr: Not tested.ICC: Not tested.LimitationsThis product is intended for Research Use Only. Interpretation of the test results is solely the responsibility of the user.PrecautionsUsers should follow general laboratory precautions when handling this product. Wear personal protective equipment to avoid contact with skin and eyes.References1.Kim, I.; Kim, J.-H.; Ryu, Y. S.; Jung, S. H.; Nah, J. J.; Koh, G. Y. : Characterization and expression of a novel alternatively spliced human angiopoietin-2. J. Biol. Chem. 275: 18550-18556, 2000. 2. Maisonpierre, P. C.; Suri, C.; Jones, P. F.; Bartunkova, S.; Wiegand, S. J.; Radziejewski, C.; Compton, D.; McClain, J.; Aldrich, T. H.; Papadopoulos, N.; Daly, T. J.; Davis, S.; Sato, T. N.; Yancopoulos, G. D. : Angiopoietin-2, a natural antagonist for Tie2 that disrupts in vivo angiogenesis. Science 277: 55-60, 1997. 3.Ward, E. G.; Grosios, K.; Markham, A. F.; Jones, P. F. : Genomic structures of the human angiopoietins show polymorphism in angiopoietin-2. Cytogenet. Cell Genet. 94: 147-154, 2001.