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Immunoblotting for the expression of NADPH oxidase subunits in saline- and cocaine-treated hearts. A, representative examples of immunoblots. Cardiac troponin I was used as a loading control. B, protein bands were quantified densitometrically and normalized to the expression of cardiac troponin I in the same sample. The results were expressed as arbitrary units. *, p < 0.05 for cocaine value versus saline controls. n = 12 animals.
