
Contents | BrdU Reagent,Fixing SolutionPrediluted Anti-BrdU DetectorPeroxidase Goat Anti-Mouse IgGConjugate DiluentSubstrate50X Plate Wash ConcwentrateStop Solution |
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Application | BrdU Cell Proliferation Assay |
BrdU Proliferation Assay involves incorporation of BrdU into cells cultured in microtiter plates using the cell layer as the solid phase. During the final 2 to 24 hours of culture BrdU is added to wells of the microtiter plate. BrdU will be incorporated into the DNA of dividing cells. To enable antibody binding to the incorporated BrdU cells must be fixed, permeabilized and the DNA denatured. This is all done in one step by treatment with Fixing Solution. Detector anti-BrdU monoclonal antibody is pipetted into the wells and allowed to incubate for one hour, during which time it binds to any incorporated BrdU. Unbound antibody is washed away and horseradish peroxidase-conjugated goat anti-mouse antibody is added, which binds to the Detector Antibody.
The horseradish peroxidase catalyzes the conversion of the chromogenic substrate tetra-methylbenzidine (TMB) from a colorless solution to a blue solution (or yellow after the addition of stopping reagent), the intensity of which is proportional to the amount of incorporated BrdU in the cells. The colored reaction product is quantified using a spectrophotometer.
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1、如果是提取的总蛋白,然后做WB,用β-actin或者GAPDH做内参肯定是没有问题的,这是公认的东西。
2、如果用膜蛋白提取试剂盒提取蛋白,再用β-actin作为内参似乎不妥,因为理论上来讲β-actin在膜上是不表达的。WB能做出β-actin来是因为膜蛋白提取时把胞质蛋白也提出来了。然而,如果我们试验目的是用药物处理细胞,比较处理前后某种膜蛋白的表达情况,此时用膜蛋白提取试剂盒提取膜蛋白后再用β-actin做内参似乎就不妥了,因为你根本不知道药物处理前后混杂了多少的胞质蛋白进来。如果没有胞质蛋白混进去的话,β-actin就是检测不到的。
转膜后就要区分与胶接触的一面与另一面了。话说楼主好奇的话可以跑蛋白的试试看哈。比如目的蛋白的胶用光滑面贴着胶,内参蛋白用粗糙面贴着胶一起转膜试试转膜结果看看呢。

