(a) Doxycycline-inducible empty vector (EV) or RAB2A-shRNA MDA-MB-231 cells were cultured in the absence (-) or presence (+) of doxycycline for three days, and immunoblotted with anti-RAB2A and anti-actin antibodies. The intensity of RAB2A relative to actin is shown on the bottom. Relative density in uninduced EV cells was set to 1. 