Contents

H,-J. Apell: Structure –Function Relationship in P-Tyype ATPases – A Biophysical Approach

H. Koepsell, B. Schmitt, and V. Goboulev: Organic Cation Transporters

W.G. Wier and K.G. Morgan:Alpha1-Adrenergic Signaling Mechanisms in Mammalian Resistance Arteries

G. Ahnert-Hilger, M. H?ltje, I. Pahner, S. Winter and I. Brunk: Regulation of Vesicular Neurotransmitter Transporters