Figure 6.
UPD protein binds MOM. Transfected 293T cells were incubated with concentrated conditioned medium from 293T cells, producing UPD–V5. Following incubation with conditioned medium, the cells were washed, fixed in paraformaldehyde/PBS, and incubated with mouse anti-V5 and rabbit anti-STAT92E antibodies. Only 293T cells expressing STAT92E/HA–MOM and STAT92E/HA–MOM-N show strong staining when incubated with UPD and anti-V5 antibody (left and middle panels). Cells transfected with HA–STAT92E alone show a background staining when incubated with UPD-containing conditioned medium (right panel). These results suggest that UPD specifically binds to 293T cells expressing MOM.