Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Paracellular ion permeability. (A) Schematic drawing of the paracellular pathway of an epithelial monolayer. Estimated pore diameter of the paracellular tight junction channel (PTJC) is ∼6 Å. (B) PTJC is inserted at the tight junction permeability barrier.
