Tight Junctions

**Definition:** Cell-cell junctions that seal adjacent epithelial cells together, preventing the passage of most dissolved molecules from one side of the epithelial sheet to the other. (Alberts et al., Molecular Biology of the Cell, 2nd ed, p22)

**Tree numbers:** - A11.284.149.165.420.820

**Synonyms:** - Occluding Junctions - Zonula Occludens