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MSE55 expression induces membrane protrusions. NIH 3T3 cells were seeded on gridded coverslips 24 hr before microinjection. Cells were comicroinjected with mammalian expression vectors for MSE55 and EGFP (used as a tracking agent). Upon detection of EGFP expression, time-lapse video microscopy was begun and digitized images were captured at 2-min intervals. Cell is shown at 3.5, 4, and 9 hr after microinjection.
