Water flux and electrolyte concentration in the lateral intercellular cleft. The water flux through the TJ and thus through the lateral intercellular cleft (upper panel) and the electrolyte concentration c
(lower panel) are depicted in dependence on the luminal electrolyte concentration c
. The results are shown for LI-cadherin binding, i.e. a narrow intercellular cleft (solid line) and for inactive LI-cadherin, i.e. a wide intercellular cleft (dashed line).