链霉亲和素SA

链霉亲和素

链霉亲和素SA

货号：S7051

简介：
链霉亲和素 (Streptavidin，SA)，是链霉菌在培养过程中分泌的一种蛋白，通常以四聚体形式存在，与生物素具有很高的结合亲和力，一摩尔的链霉亲和素可以结合四摩尔的生物素。由于链霉亲和素等电点比亲和素低，且不含糖基链，故在检测中的灵敏度和特异性都高于亲和素，建立在此基础上的生物素-链霉亲和素系统的应用比生物素-亲和素系统有更大优势，广泛应用于免疫学和分子生物学。

产品介绍

其它名称：链霉亲和素，Streptavidin，SA

货号：S7051

种类：抗原

应用：CLIA，POCT

特异性：Streptavidin

来源：重组蛋白

存贮：-20℃

产品说明

Streptavidin is a tetrameric protein secreted by Streptomyces avidinii which binds firmly to biotin. Streptavidin is widely 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.