A, representative fluorescence images of N-V5-aromatase (magenta) in stably transfected HEK293 cells with empty vector (EV), N-V5-aromatase (N-V5-AROM), K108R mutant (N-V5-K108R), K108Q mutant (N-V5-K108Q), K440R mutant (N-V5-K440R) and K440Q mutant (N-V5-K440Q) proteins are shown. Merge of nuclear staining with DAPI (blue) and N-V5-aromatase (magenta) proteins is shown as DAPI/AROM for each of the mutant. B, Endoplasmic reticulum fractions (ERec extract) and total cell extract of HEK293 cells stably transfected with WT and mutant aromatase constructs showing V5-aromatase, calnexin and Gapdh endogenous control.