Fig. 5. CYP1A immunoreactivity (brown/black) in the torus longitudinalis, corpus
cerebelli and tectum mesencephali in the control and ß-naphthoflavone
(BNF)-treated juvenile lake trout. Horizontal sections (20 µm thick) are
counterstained with hematoxylin nuclear stain (purple). Scale bar, 100
µm.