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Electrostatics of TRAP and integrin αI domains. Surfaces of open vivax TRAP VWA (A) and integrin αI domains (B and C) are shown in identical orientations, with the position of the MIDAS metal ion marked with an x. Electrostatic solvent accessible surfaces [−5 (red) to +5 (blue) kT/e] were calculated using the Poisson--Boltzmann approximation.
