Table 1. Source, clone, and dilution of antibodies.

Antibody	Company	Clone	Dilution
EMP1	Abcam, Cambridge, UK	N-terminal	1:100
EMP2	Abcam, Cambridge, UK	C-terminal	1:100
EMP3	Santa Cruz Biotechnology, Santa Cruz, USA	SW-5	1:100

EMP = epithelial membrane protein.