Study on Acridine Orange dimer as a new fluorescent probe for the determination of protein

Luo Yunjing, Shen Hanxi
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引用次数: 24

Abstract

A nonfluorescent dimer of Acridine Orange is formed in situ in the presence of the anionic surfactant, sodium dodecyl sulfate (SDS). Proteins labeled with Acridine Orange dimer (AOAO) show a greatly enhanced fluorometric activity compared with that of AOAO. Based on this, a new, fast and sensitive fluorescent probe for the determination of proteins was developed. The linear range of this assay is 0.66–39.8 µg mL–1. For the detection of proteins in human serum, this method gave values close to that of the conventional Coomassie Brilliant Blue (CBB) method, but the sensitivity of the method is much superior to that of the CBB method. The detection limit for BSA was 0.08 µg mL–1.
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吖啶橙二聚体作为新型蛋白质荧光探针的研究
吖啶橙的非荧光二聚体在阴离子表面活性剂十二烷基硫酸钠(SDS)的存在下原位形成。与AOAO相比,用吖啶橙二聚体(AOAO)标记的蛋白质具有显著增强的荧光活性。在此基础上,研制了一种快速灵敏的蛋白质荧光探针。该方法的线性范围为0.66 ~ 39.8µg mL-1。对于人血清中蛋白质的检测,该方法的测定值与传统的考马斯亮蓝(CBB)法接近,但灵敏度远优于CBB法。BSA的检出限为0.08µg mL-1。
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