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Fig. 5. Membrane-associated Hrs and clathrin are rapidly exchanged with cytosolic pools. HeLa cells were co-transfected with Rab5Q79L and GFP-clathrin LC or YFP-Hrs, and studied live at 25°C as described in Materials and Methods. After photobleaching of whole endosomes, both Hrs and clathrin recovered in microdomains on the limiting membrane of the enlarged endosomes. (A) Representative images of GFP-clathrin LC and YFP-Hrs. (B) Representative recovery curve for YFP-Hrs. (C) Representative recovery curve for GFP-clathrin LC. The half time of the recovery, t1/2, was calculated from several recordings. YFP-Hrs, n=12; GFP-clathrin LC, n=9.