Fig. 4
a Effect of metformin on AMPK phosphorylation in mocks vs wild OCT-1 transfected HepG2 cells: Representative ummunoblots showing the change in pAMPK expression by the presence/absence of metformin in cells expressing vehicle control and OCT-1. The lower panel represents the effect of the same on the expression of β–actin protein used as a loading control. b Graph showing normalised densitometric values for the metformin treated and untreated mock and wild type cells