Figure 7.
Knockout of the unique PKC consensus phosphorylation sites prevents full activation of XCFTR by PMA. (A) Representative I-V relationships from an oocyte expressing the double knockout of conserved PKC consensus phosphorylation sites (S686A/S790A-XCFTR). (B) I-V plot from a cell expressing the double knockout of unique PKC consensus phosphorylation sites (T665A/S694A-XCFTR). (C) Summary of results from experiments identical to those in A (n = 4) and B (n = 6). The results indicate that at least one of the conserved PKC consensus sites is necessary for full activation by PMA. See Fig. 1 and Fig. 2 for additional details.