型号:21071
联系人:王
联系电话:13466675923
品牌:intron
基于BCA测定法化20~2000 ug / ml蛋白质纯化
SMART? BCA Protein Assay Kit is a detergent-compatible formulation based on bicinchoninic acid(BCA) for the colorimetric detection and quantitation of total protein. The purple-colored reaction product of this assay is formed by the chelation of two molecules of BCA with one cuprous ion. This water-soluble complex exhibits a strong absorbance at 562 nm that is nearly linear with increasing protein concentrations over a broad working range. (20-2,000 ug/ml) The macromolecular structure of protein, the number of peptide bonds and the presence of four particular amino acids(cystein, cystine, tryptophan and tyrosine)are reported to be responsible for color formation with BCA. Studies with di-, tri- and tetrapeptides suggest that the extent of color formation caused by more than the mere sum of individual colorproducing functional groups. Accordingly, protein concentrations generally are determined and reported with reference to standards of a common protein such as bovine serum albumin (BSA). A series of dilutions of known concentration are prepared from the protein and assayed alongside the unknown(s) before the concentration of each unknown is determined based on the standard curve.
提出了两种测定方法。其中,试管程序需要更大体积(0.1ml)的蛋白质样品; 但是,因为它使用样品与工作溶液的比例为1:20(v / v),干扰物质的影响小化。微孔板程序使得微孔板的样品处理容易,并且需要较小体积(10-25ul)的蛋白质样品; 然而,由于样品与工作溶液的比例为1:8(v / v),因此在克服干扰物质浓度和获得低水平检测方面提供的灵活性较低。
内容 |
试管:200次试验 微孔板:2,000次试验 |
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解决方案A. | 250ml×2 ea |
解决方案B. | 10ml×1 ea |
BSA溶液(2 mg / ml) | 1ml×10 ea |
灵敏度比较实验
SMART?BCA蛋白质分析试剂盒比竞争产品灵敏15%至20%。用微孔板读数器(在37℃温育30分钟)测量显色反应。
高保真度
SMART?BCA蛋白质分析试剂盒比竞争对手更敏感,具有相似的变异模式。
A组,SMART?BCA蛋白质分析试剂盒; B组,竞争对手