%0 Journal Article %T The Claudins: From Tight Junctions to Biological Systems %J - %D 2019 %R https://doi.org/10.1016/j.tibs.2018.09.008 %X The claudin protein family, which has 27 members in mammals, consists of tight junction (TJ) proteins that are indispensable for the paracellular barrier in vertebrate epithelial cell sheets %U https://www.cell.com/trends/biochemical-sciences/fulltext/S0968-0004(18)30193-2