首页>
外国专利>
METHOD FOR TRANSPORTING POTASSIUM ION FROM FRONT SIDE TO BACK SIDE OF LIPID BILAYER MEMBRANE
METHOD FOR TRANSPORTING POTASSIUM ION FROM FRONT SIDE TO BACK SIDE OF LIPID BILAYER MEMBRANE
展开▼
机译:脂双层膜从前向后传输钾离子的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Disclosed are: a method for transporting a potassium ion from the front side to the back side of a lipid bilayer membrane upon the reaction with a chemical substance; and a method for detecting or quantifying a chemical substance utilizing the transporting method.Specifically disclosed is a method for transporting a potassium ion from the front side to the back side of a lipid bilayer membrane, which comprises the following steps (a) and (b): (a) a step of introducing a first plasmid capable of expressing a chemical substance receptor, a second plasmid capable of expressing a modified potassium ion channel GIRK1 in which a phenylalanine residue located at position-137 has been substituted by a serine residue, and a third plasmid capable of expressing G protein into a cell to cause the co-expression of the chemical substance receptor, the modified potassium ion channel GIRK1 and G protein on a lipid bilayer membrane that constitutes the surface of the cell; and (b) a step of supplying the chemical substance from the front side of the lipid bilayer membrane to cause the binding of a subunit of G protein released by the action of the chemical substance receptor to the modified potassium ion channel GIRK1, thereby transporting a potassium ion from the front side to the back side of the lipid bilayer membrane.
展开▼