产品新闻
背景资料
Streptavidin is a tetrameric protein secreted by Streptomyces avidinii which binds firmly to biotin. Streptavidin is wilyde used in molecular biology through its unique high affinity for the vitamin biotin. The dissociation constant （Kd） of the biotin-streptavidin complex is about ~10-15 mol/L. The strong affinity recognition of biotin and biotinylated molecules has made streptavidin one of the most important components in diagnostics and laboratory kits. The streptavidin/biotin system has one of the biggest free energies of association of yet observed for noncovalent binding of a protein and small ligand in aqueous solution （K_assoc = 10**14）. The complexes are also extremely stable over a wide range of temperature and pH.
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来源宿主
细菌中纯化的链霉亲生物素蛋白
溶解建议
Sterile Filtered lyophilized powder. Lyophilized in 10mM potassium phosphate buffer pH 6.5. Gives a clear solution at 5mg/ml in 0.1M NaCl.
保存建议
Streptavidin although stable at 4℃ for 3 weeks， should be stored desiccated below -18℃. For longer storage in dissolved form add 1mM EDTA and/or 0.02 % NaN3 or pass the solution through a sterile filter. Please prevent freeze-thaw cycles.
其他
ProSpec 是一家 著名细胞因子蛋白生产和研发的公司，具有20多年的生产经验，专注于蛋白（重组及合成）生产研发。我们的核心产品包括：干扰素、白介素、骨蛋白、肿瘤坏死因子、成纤维生长因子、瘦素、干细胞因子、催乳素、表皮生长因子、胰岛素样生长因子、神经生长因子、集落刺激因子、激素、酶、病毒抗原以及各种重组蛋白等。 生产工艺和规模使其可以提供毫克到克级蛋白，价格优于同类公司。绝大部分产品是天然成熟型蛋白，而不含有标签蛋白。考虑到大部分研究者希望能更灵活地配制蛋白溶液，ProSpec-Tany绝大部分产品没有添加保护剂或盐，这就对工艺提出了更高的要求。同时，ProSpec-Tany绝大部分产品为冻干粉，因此易于运输和保存。
