A dipole lattice model for lipid membranes and their interactions with pept
ides is presented. It uses the Langevin dipole method to calculate electros
tatic interactions in the heterogeneous membrane environment. A series of t
est cases are presented, including spherical charges, dipoles, side chain a
nalogs, and helical peptides. The model consistently produces qualitatively
correct results. Proteins 2000;41:211-223. (C) 2000 Wiley-Liss, Inc.