Members of this family are claudins, that form tight junctions between cells.

1: The claudin gene family: expression in normal and neoplastic tissues. Hewitt KJ, Agarwal R, Morin PJ; BMC Cancer. 2006;6:186. PMID:16836752

2: Claudins: emerging targets for cancer therapy. Kominsky SL; Expert Rev Mol Med. 2006;8:1-11. PMID:16887048