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快速定量,Abbkine 蛋白质定量试剂盒BCA法来了!
2022-07-07 02:11:00 【Sylvia_sc】
在蛋白质的提取、纯化和分析过程中,蛋白质的定量随处可见。比如在裂解细胞之后,我们对各个样品中的蛋白进行定量,方便下游应用中的平行比较;而在蛋白电泳之前,我们也需要准确定量,以免精心准备的电泳(特别是2D电泳)抱憾而归。鉴于不同的蛋白样品中可能存在各种各样的(干扰)组分,测定蛋白浓度的方法也有许多种。
BCA法是比较常用的一种蛋白定量方法。目前Google学术搜索已有14万条结果。BCA法的基本原理是,蛋白质在碱性环境下与Cu2+络合,并将Cu2+还原为Cu1+。通过两个BCA分子与还原态Cu1+的螯合,可形成紫色的显色反应产物。该产物在562 nm处有较高的吸光值,并与蛋白质浓度呈正比。
此外,BCA法有着高度的均一性。相对于Bradford染料结合方法而言,不同蛋白质之间的变异性更小。
接下来我们要说的是Abbkine的BCA法蛋白质定量试剂盒。
Abbkine BCA法 蛋白质定量试剂盒实验建议:
BCA法适用于检测20-2,000 µg/mL范围内的蛋白浓度,最小检测蛋白量达到0.4 µg,待测样品体积为 1-20 µL。
Abbkine BCA法 蛋白质定量试剂盒特点:
• 节省时间—比传统的Lowry方法更容易,速度快4倍。
• 灵敏度高—检测限低至20 ug/mL,最低检测蛋白量达到0.4 ug。
• 线性卓越—线性工作范围20-2000 ug/mL。
• 良好的稳定性—与染料结合的方法相比,检测不同蛋白质分子的变异系数更小。
• 兼容性好—不受大多数离子型和非离子型洗涤剂的影响,样品中最多可兼容5% SDS, 5% Triton X-100, 5% Tween-20,60,80。
Abbkine BCA法 蛋白质定量试剂盒标准曲线:

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