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Nuclear localization and growth factor withdrawal. hTCEpi cells were double-labeled with IGF-1Rβ (green) and DRAQ5 (nuclear counterstain, red) after culture in normal growth media containing supplements (growth) and in basal media for 4 and 24 hours. Culture in basal media in the absence of growth factors failed to alter nuclear localization of the receptor. Scale: 22.5 µm.
