Fig. 9. Kinetics of IL-2Rβ sorting to transferrin receptor-positive compartments. Cells grown on coverslips were incubated with TU11 and an anti-transferrin receptor antibody at 0°C, followed by treatment with a chemical crosslinker. The cells were then incubated at 37°C, fixed at the indicated times and incubated with fluorescently labeled secondary antibodies. Red, green and yellow areas indicate IL-2Rβ staining, transferrin receptor staining and colocalization of the red and green staining, respectively. Scale bars: 5 µm.