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蛋白提取及WB
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==BCA测总蛋白== #试剂配制 ##试剂A:将10g BCA(二辛可宁酸)、20g Na<sub>2</sub>CO<sub>3</sub>H<sub>2</sub>O、6g Na<sub>2</sub>C<sub>4</sub>H<sub>4</sub>O<sub>6</sub>2H<sub>2</sub>O、4g NaOH和5g NaHCO3溶解于1 L蒸馏水中,NaOH或Na2CO3调节pH值至11.25。 ##试剂B:取2g CuSO<sub>4</sub> 5H<sub>2</sub>O溶解于蒸馏水中,定容至50ml。 ##BCA工作液:试剂A:试剂B=50:1混匀,可稳定一周。 ##标准蛋白质溶液:0.5mg/ml的BSA水溶液。 #实验操作 ##PBS稀释组织样品5-10倍 ##校正标样(n=3)的制备:将0.5mg/ml的BSA水溶液分别取0、1、2、4、8、12、16、20 uL至96孔板中。加PBS补足至20 ul。(蛋白浓度分别为0、0.025、0.05、0.1、0.2、0.3、0.4、0.5 mg/mL)。浓度可按需调整,该方法LLOQ为0.01 mg/mL ##20μl的样品溶液(n=3)加入到96孔酶标板中 ##每孔加入200μL BCA工作液, ##37℃孵育20~30min ##自然冷却至室温。 ##吸光度测定:在562nm下酶标仪比色测定,同时以空白孔作为参照。
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