Merck + Co., Inc.

The State University of New York

Ken K Liu

Joseph P Arena

Doris F Cully

Jeffrey W Warmke

Leonardus H Van Der Ploeg

Linda M Hall

Guoping Feng

Peiyi Wang

Philip S Paress

Demetrios Vassilatis

DNA encoding glutamate and avermectin-sensitive chloride channels have been cloned and characterized. The protein is capable of forming channels selectively opened with either avermectin or glutamate. The cDNA has been expressed in recombinant host cells which produce active recombinant protein. The recombinant protein is also purified from the recombinant host cells. In addition, the recombinant host cells are utilized to establish a method for identifying modulators of the receptor activity, and receptor modulators are identified. Receptor modulators active in the method disclosed herein are useful as ectoparasiticides, antiparasitic, anthelmenthic, acaracidal and insecticide agents.

DNA encoding glutamate gated chloride channels

DNAs encoding voltage-activated cation channels have been cloned and characterized. The cDNA's have been expressed in recombinant host cells which produce active recombinant protein. The recombinant protein is also purified from the recombinant host cells.

Process for functional expression of the para cation channel

DNAs encoding glutamate and avermectin-sensitive chloride channels have been cloned and characterized. The individual alpha and beta subunits are capable of forming homomeric and heteromeric channels selectively opened with either avermectin or glutamate. The cDNA's have been expressed in recombinant host cells which produce active recombinant protein. The recombinant protein is also purified from the recombinant host cells. In addition, the recombinant host cells are utilized to establish a method for identifying modulators of the receptor activity, and receptor modulators are identified. Receptor modulators are useful as insecticides and anthelminthic agents.

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Laurence Harbor, NJ, United States of America

Ken K Liu