Interaction of Necl-2 with integrin α6β4 through its extracellular region. A, schematic diagram of Necl-2 fragments. Necl-2 fragments were tagged with a FLAG epitope at the N terminus. FERM, 4.1/ezrin/radixin/moesin. +, positive for the interaction with integrin β4; −, negative for the interaction with integrin β4. B, HEK293 cells were co-transfected with various combinations of the indicated plasmids and cultured in suspension. FLAG-tagged full-length Necl-2 or deletion mutants of Necl-2 were immunoprecipitated using the anti-FLAG-mAb, and samples were subjected to Western blotting using the indicated Abs. Asterisks, full-length or mutants of Necl-2. IB, immunoblot.