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Electrostatic surface of the claudin 4 tetrameric models. Cross sections of the Pore I (A) and Pore II (B) electrostatic surfaces in the paracellular region computed with the adaptive Poisson–Boltzmann solver (APBS). Potentials are shown with a red‐white‐blue color map with values ranging from −5 to +5 kT/e.
