A method of detecting a membrane protein by mass spectrometry comprises: (a) providing a solution comprising a detergent micelle in which said membrane protein is contained; (b) providing a mass spectrometer comprising a nanoelectrospray ionisation source, a mass analyser and a detector; (c) vaporising the solution using the nanoelectrospray ionisation source under conditions such that the membrane protein is released from the micelle; (d) ionising the membrane protein; (e) resolving the ionised membrane protein using the mass analyser; and (f) detecting the resolved membrane protein using the detector; wherein the solution contains a phosphate ester detergent which forms said detergent micelle. Also provided are reagents for use in said method.
一种利用质谱检测膜蛋白的方法包括(a) 提供包含洗涤剂胶束的溶液,其中含有所述膜蛋白; (b) 提供包括纳米电喷雾离子源、质量分析器和检测器的质谱仪; (c) 在使膜蛋白从胶束中释放的条件下,使用纳米电喷雾离子源蒸发溶液;(d) 电离膜蛋白; (e) 使用质量分析器解析电离出的膜蛋白;以及 (f) 使用检测器检测解析出的膜蛋白;其中溶液含有
磷酸酯去垢剂,形成所述去垢胶束。还提供了用于所述方法的试剂。