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. 2011 Apr 18;193(2):347–363. doi: 10.1083/jcb.201010034

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© 2011 Day et al.

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Figure 3. — Ultrastructural analysis revealed localization of RIα-GFP in MVBs. Light and electron microscopy pictures were correlated to look for the localization of GFP-tagged RIα. (A and B, top) White/black arrows point to an MVB that was correlated. (bottom) The MVB is indicated by black squares. (bottom right) RIα-GFP is the dark black area within the MVB indicated by a black arrow. (A) Prkar1a^−/− MEFs were transfected with RIα-GFP (green). (B) Prkar1a^−/− MEFs were cotransfected with RIα-GFP (green) and PKAc-mCherry (red) and treated with 20 µM forskolin/200 µM IBMX. (C) Untransfected Prkar1a^−/− MEFs were treated with 20 µM forskolin/200 µM IBMX. An enlarged image of MVBs from within the black square is shown on the right. The MVBs are indicated by black arrowheads.