Recombinant Macrovipera lebetina obtusa Disintegrin obtustatin

Is a potent and selective inhibitor of alpha-1/beta-1 (ITGA1/ITGB1) integrin. It blocks the adhesion of alpha-1/beta-1-expressing K562 cells to immobilized collagens IV and I with IC (50) of 2 and 0.5 nM, respectively. Potently inhibits angiogenesis in chicken and in mouse model and reduces tumor development by half. Is 25-fold less potent than viperistatin.

If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

"Obtustatin: a potent selective inhibitor of alpha1beta1 integrin in vitro and angiogenesis in vivo." Marcinkiewicz C., Weinreb P.H., Calvete J.J., Kisiel D.G., Mousa S.A., Tuszynski G.P., Lobb R.R. Cancer Res. 63:2020-2023 (2003)

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.