Ultsch, A., Schuster, C.M., Laube, B., Schloss, P., Schmitt, B., Betz, H. (1992). Glutamate receptors of Drosophila melanogaster: cloning of a kainate-selective subunit expressed in the central nervous system.
Proc. Natl. Acad. Sci. U.S.A. 89(21): 10484--10488.