Figure 4

Bioluminescence imaging of BACH2-reporter cells. (a) Imaging of inducible-BACH2 reporter cells 6 h after PMA/ionomycin stimulation with or without tetracycline (1 μg/ml) treatment. Unstimulated cells were included (indicated as Vehicle). Images were captured after luciferase substrate addition using brightfield (left) and luminescence (right) channels. Each panel is a representative 300 μm × 300 μm cropped area from the overview image. (b) Frequency of positive luminescent cells in stimulated inducible-BACH2 reporter cells following pre-treatment with the indicated doses of tetracycline.