AFMPB: An adaptive fast multipole Poisson–Boltzmann solver for calculating electrostatics in biomolecular systems Original Research Article

A Fortran program package is introduced for rapid evaluation of the electrostatic potentials and forces in biomolecular systems modeled by the linearized Poisson–Boltzmann equation. The numerical solver utilizes a well-conditioned boundary integral equation (BIE) formulation, a node–patch discretization scheme, a Krylov subspace iterative solver package with reverse communication protocols, and an adaptive new version of fast multipole method in which the exponential expansions are used to diagonalize the multipole-to-local translations. The program and its full description, as well as several closely related libraries and utility tools are available at and a mirror site at . This paper is a brief summary of the program: the algorithms, the implementation and the usage.