Protease-free albumin is chromatographically purified from New Zealand-sourced bovine plasma in an ISO quality system assuring complete traceability and consistent high quality. With no detectable enzymatic activity, this albumin is useful for immunoassays where proteases may degrade proteins or where peroxidase or alkaline phospahatase may hydrolyze substrates. Form: Powder Purity: ≥97% w/w total protein Total Protein: ≥95% w/w total protein Moisture: ≤5% w/w Protease: None detected
This Protease Free Albumin is available in the ChromatoPur™ Albumin Sample Pack (catalog number 02CHROMATOPURS).
牛血清白蛋白(Bovine Serum Albumin, BSA)是牛血清中的一种球蛋白,又称第五组分(需要注意的是,第五组分并不是BSA的一种组份,而是Edwin J. Cohn教授早期从血液中通过特定的分离技术得到5种组份,其中第五种就是白蛋白),CAS号为9048-46-8,包含583个氨基酸残基,分子量为66.430 kDa,等电点为4.7。牛血清白蛋白在生化实验中有广泛的应用,例如在western blot中作为封闭试剂。血液中的白蛋白主要起维持渗透压作用、PH缓冲作用、载体作用和营养作用。在动物细胞无血清培养中,添加白蛋白可起到生理和机械保护作用和载体作用。