ABSTRACT
The excellent technical assistance of Petra Christmann, Inge Frommer and Gabie Krämer, Karin Mertzsch and Heribert Mohr and the secretarial help of
Annemarie Achten are gratefully acknowledged. This study was supported in part by grants from the Deutsche Forschungsgemeinschaft (Fa 146/1-3, Vo 317/3-2 and SFB 352) Bonn-Bad Godesberg, FRG, and from the state of Baden-Württemberg funds (LFSP. Transportvorgange im Endomembransystem).
