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Recombinant Human Angiopoietin-2 (rHuANG-2)

Catalog #

5057

Price:

From $50.00 to $6,570.00
2ug - $50
10ug - $130
1000ug - $6,570

CERTIFICATE OF ANALYSIS AND DATA SHEET

PRODUCT DESCRIPTION:
Human Angiopoitin-2 (Ang-2), a 66 kDa protein consisting of 476 amino acid residues (N21-F496), is fused to a N-terminal myc-tag and produced in insect cells. The angiopoietin (Ang) family of growth factors includes four members, all of which bind to the endothelial receptor tyrosine kinase Tie2. Two of the Angs, Ang-1 and Ang-4, activate the Tie2 receptor, whereas Ang-2 and Ang-3 inhibit Ang-1-induced Tie2 phosphorylation. Angiopoietin-1 (Ang-1) is a secreted growth factor which binds to and activates the Tie-2 receptor tyrosine kinase. The factor enhances endothelial cell survival and capillary morphogenesis, and also limits capillary permeability. Ang-2 binds the same receptor but fails to activate it: hence, it is a natural inhibitor of Ang-1. Ang-2 destabilises capillary integrity, facilitating sprouting when ambient vascular endothelial growth factor (VEGF) levels are high, but causing vessel regression when VEGF levels are low. Tie -1 is a Tie -2 homologue but its ligands are unknown. Angiopoietin and Tie genes are expressed in the mammalian metanephros, the precursor of the adult kidney, where they may play a role in endothelial precursor growth. Tie-1-expressing cells can be detected in the metanephros when it first forms and, based on transplantation experiments, these precursors contribute to the generation of glomerular capillaries. During glomerular maturation, podocyte-derived Ang-1 and mesangial-cell-derived Ang-2 may affect growth of nascent capillaries. After birth, vasa rectae acquire their mature configuration and Ang-2 expressed by descending limbs of loops of Henle would be well placed to affect the growth of this medullary microcirculation. Finally, preliminary data implicate angiopoietins in deregulated vessel growth in Wilms' kidney tumours and in vascular remodelling after nephrotoxicity. Altogether, existing data suggest that VEGF-A and Angiopoietins not only have quite different roles during vascular development, but also very complementary and coordinated roles.

SOURCE: Insect Cells

FORMULATION:
The protein is formulated with no additives

PURITY:
Greater than 95.0% as determined by: (a) Analysis by RP-HPLC. (b) Analysis by SDS-PAGE (c) Analysis by reducing and non-reducing SDS-PAGE Silver Stained gel.

STORAGE:
Although stable at room temperature for 3 weeks, it should be stored desiccated below -18°C. Upon reconstitution it should be stored at 4°C between 2-7 days and for future use below -18°C. Please prevent freeze-thaw cycles.

BIOLOGICAL ACTIVITY:
The biological activity was determined by the induction of endothelial cell sprouting as described in Korff et al., 2001.

 
DevaTal, Inc, 644 Newkirk Ave, Hamilton NJ 08610
Phone: 609-586-1575, Fax: 609-586-6892
FOR RESEARCH USE ONLY

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