Description

Angiopoietin 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 Number

IW-PA1005

Quantity

9 ml

Host

Rabbit

Clone

Polyclonal

Isotype

IgG

Immunogen

A 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.

Purity

Immunogen affinity purified

Conjugate

Unconjugated

Species Reactivity

Human, mouse, rat. Not tested in other species.

Positive Control

Placenta

Cellular Localization

Cytoplasmic

Form

Ready to use solution. No further dilution needed. Serum blocking step should be omitted.

Storage

Store at 2-8 °C. Do not freeze.

Applications

IHC-P: Heat induced epitope retrieval is required on formalin fixed paraffin sections.

IHC-Fr: Not tested.

ICC: Not tested.

Limitations

This product is intended for Research Use Only. Interpretation of the test results is solely the responsibility of the user.

Precautions

Users should follow general laboratory precautions when handling this product. Wear personal protective equipment to avoid contact with skin and eyes.

References

1.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.

Images

Immunohistochemical analysis of formalin fixed paraffin-embedded human placenta using ANG2 antibody.