普美克生产的超敏ECL发光底物检测试剂盒用于检测直接或间接标记辣根过氧化物酶（HRP）的抗体及其关联的抗原。其原理是，蛋白质或核酸在电泳后转移到印迹膜上，以一抗及HRP标记的二抗结合膜上的目的蛋白，或以HRP标记的探针直接或间接结合膜上的核酸。洗膜后用本产品配制的ECL工作液，室温孵育膜数分钟，将印迹膜用保鲜膜包被粘贴固定于X光片曝光暗盒。然后转入暗室将X光胶片压在膜上曝光数秒到数小时，显影定影后蛋白质或核酸条带可清晰显示在X光胶片上。
本产品采用独特的发光底物系统，降低曝光背景的同时引入新型的氧化剂，大大提高试剂盒的稳定性，使其在室温能稳定放置一年。本产品配制的ECL工作液衰减较慢，15min内荧光几无减弱，检测时产生的非特异背景非常低，也可节省抗体和待测样品的用量，该试剂可用于PVDF膜和NC膜(硝酸纤维素膜)的Western blot免疫印迹等印迹发光显色。除用于X光胶片，还可直接使用荧光CCD扫描。
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2、本产品A液和B液均对人体有害，操作时请小心，并注意有效防护避免直接接触人体或吸入体内。本产品仅限于专业人员的科学研究用，不得用于临床诊断或治疗，不得用于食品或药品，不得存放于普通住宅内。
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答：可能的原因有：
1、目的蛋白有多个修饰位点，本身可以呈现多条带，建议查阅文献或进行生物信息学分析，获得蛋白序列的修饰位点信息，通过去修饰确定蛋白实际大小；
2、样本处理过程中目的蛋白发生降解,建议加入蛋白酶抑制剂；样本处理时在冰上操作；
3、杂蛋白多，建议处理目的蛋白；
4、抗体特异性不强，建议使用特异性强的抗体；
5、抗体孵育时间过久，建议减少抗体孵育时间；
6、二抗与抗原有交叉反应，建议选择合适的封闭物；
7、二聚体或多聚体存在，建议增加蛋白质变性过程及强度；
8、底物显色与曝光时间过长，建议缩短显色及曝光的时间。
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