| abstract |
An object of the present invention is to detect a specific chemical substance with high sensitivity and high precision. By using a specific lipid bilayer membrane, a chemical substance is detected with high sensitivity and high precision. Here, the specific lipid bilayer membrane comprises a chemical substance receptor, a chimeric G protein, and a potassium ion channel. The chimeric G protein comprises a chimeric Gα subunit and a Gβγ subunit complex. The chimeric Gα subunit is selected from the group consisting of Gi/olf13 (SEQ ID NO: 04), Gi/olf28 (SEQ ID NO: 05), Gi/olf94 (SEQ ID NO: 07), Gi/olf113 (SEQ ID NO: 08), Gi/olf α3-β5,C (SEQ ID NO: 12), and Gi/olfα4-β6,C (SEQ ID NO: 15). |