The primary antibodies used were K3 (AE5) monoclonal antibody (against rabbit K3
1 ; Chemicon, Temecula, CA; 1:1000 dilution), K19 (E6) monoclonal antibody (against rat, cross-react with rabbit
27 ; Abcam Ltd, Cambridge, UK; 1:1000 dilution), p63 (4A4) monoclonal antibody (against human TAp63 and ΔNp63, cross-react with rabbit
28 ; Chemicon; 1:1000 dilution), TAp63 (specific for TAp63) and ΔNp63 (specific for ΔNp63) polyclonal antibodies (against human, cross-react with rabbit
29 ; Biolegend, San Diego, CA; 1:1000 dilution), K14 (LL002) monoclonal antibody (against human, cross-react with rabbit
28 ; Chemicon; 1:1000 dilution), integrin β1 (MB1.2) monoclonal antibody (against mouse, cross-react with rabbit
28 ; Chemicon; 1:1000 dilution), STAT3 (124H6), and phospho-STAT3 (3E2) monoclonal antibodies (against mouse, the cross-reactivity and antibody-specificity to rabbit were confirmed with STAT3 polyclonal antibody [no. 9132] in cultured limbal keratinocyte; Cell Signaling, Beverly, MA; all at 1:1000 dilution), involucrin (SY5) monoclonal antibody (against human, cross-react with owl, monkey, canine, gorilla, pig, and rat; NeoMarkers, Fremount, CA; 1:400 dilution), glyceraldehyde-3-phosphate dehydrogenase (6C5) monoclonal antibody (against rabbit GAPDH; Chemicon; 1:20,000 dilution), Lamin B1 polyclonal antibody (against mouse, cross-react with human, mouse, rat, Indian Muntjac, and
Xenopus; Abcam, Cambridge, MA; 1:2000 dilution).