Embodiments of the present invention provide a staining solution and of method of using the staining solution for selectively detecting proteins that contain two or more α-helical transmembrane domains. The staining solution comprises a lipophilic dyes and at least about a 30% hydrophobic solvent. The dyes of the present are represented by the general formula A-B-E wherein A is a nitrogen heterocycle, B is a bridge moiety and E is an electron pair accepting moiety that comprises either a carbonyl or nitrogen atom. In one embodiment these lipophilic dyes are merocyanine dye, a cyanine dye, a styryl dye or a carbazolylvinyl dye.
                            本发明的实施例提供了一种染色溶液和使用该染色溶液选择性检测含有两个或多个 α-螺旋跨膜结构域的蛋白质的方法。染色溶液包括亲脂性
染料和至少约 30%的疏
水性溶剂。本发明的
染料由通式 A-B-E 表示,其中 A 是氮杂环,B 是桥基,E 是由羰基或氮原子组成的电子对接受基团。在一个实施方案中,这些亲脂性
染料是美蓝
染料、
氰基
染料、
苯乙烯基
染料或
咔唑基
乙烯基染料。