Fig. 3.
ADP-ribosylation of Gi proteins by pertussis toxin in the plasma membranes of MDAY-D2 cells but not in the MDAY-D2 transfectants S1 1.4 and S1 5.3.
The figure shows that in these transfectants, all Gi proteins had already been ADP-ribosylated by the transfected S1 catalytic subunit of pertussis toxin (PT).
