Figure 4.
A&B. Interaction of p55 and p33 proteins with HeLa cells. (A) HeLa cells were incubated with Alexa 488-labeled p55 alone (10 µg/ml) or a mixture of labeled p55 plus purified refolded p33 (5 ug/ml of each) for 4 h at 37°C degrees. Cells were imaged as described in the Experimental Procedures. (B) Cells were incubated with purified Alexa 488-labeled p55 plus purified refolded c-Myc-tagged p33 protein for 1 h at 37°C. The c-Myc-tagged p33 protein was detected by indirect immunofluorescence.