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. Höltje, I. Pahner, S. Winter and I. Brunk: Regulation of Vesicular Neurotransmitter Transporters

Structure-function relationship in P-type ATPases-a biophysical approach.- Organic cation transporters.- ?1-Adrenergic signaling mechanisms in contraction of resistance arteries.- Regulation of vesicular neurotreansmitter transporters.