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EMP2 increases HUVEC tube length. Vessel tube length of HUVEC cells was measured following incubation in conditioned media from ARPE-19/EMP2 or ARPE-19 cells. (a) HUVEC cells stained with Calcein or 4′,6-diamidino-2-phenylindole (DAPI). (b) Tube length was measured and an average was calculated from several fields. Increased expression of EMP2 significantly increased vessel tube formation (**P < 0.01).
