FOSB and cardiomyopathy: Consequently, the AP‐1 inhibitor (T‐5224, 5 mg kg−1 IP daily, totaling 80 mg kg−1) or corn oil was randomly delivered to 3‐month‐old male Slc25a49HKO or Slc25a49flox/flox mice throughout Dox‐induced cardiomyopathy (Figure6A).