1. Altenhofen, W., Ludwig, J., Eismann, E., Kraus, W., Bönigk, W. and Kaupp, U.B. (1991) Proc. Natl. Acad. Sci. USA - in press
2. Barker, W.C., Hunt, L.T., George, D.G., Yeh, L.S., Chen, H.R., Blomquist, M.C., Seibel-Ross, E., Elzanowski, A., Hong, M.K., Ferrick, D.A., Bair, J.K., Chen, S.L. and Ledley, R.S. (1986) National Biomedical Research Foundation
3. Bauer, P.J. (1988) J. Physiol. (London) 401, 309–327
4. Baumann, A., Grupe, A., Ackermann, A. and Pongs, O. (1988) EMBO J. 7, 2457–2463
5. Bodoia, R.D. and Detwiler, P.B. (1985) J. Physiol. (London) 367, 183–216