(A) Location of 15 mutations (G40R, G42R, D174G, T191_F197del, L199P,
G203R, R209C, R209G, R209H, A227V, Y231C, E246K, N270H, F275S, and
I279N) mapped on the Gαo amino acid sequence. (B, C)
Representative Western blots of Gαo protein expression
from HEK293T cells transiently transfected with each
Gαo mutant. (D, E) Quantification of relative
protein levels of each Gαo mutant compared to wild-type
Gαo. Graphs are the result of 3 independent
experiments and data are presented as mean ± SEM.
**p < 0.01,
****p < 0.0001 using 1-way
analysis of variance with Bonferroni post hoc test for pairwise
comparison.