Oma1 proteolytically processes selective de novo mitochondrial proteins. (A) Mitochondrial translation gel of Oma1 wild-type or KO MEFs labeled with ³⁵S for 4 h with actinonin. The asterisks indicate aberrant radiolabeled mitochondrial proteins. (B) Quantification of A from three independent experiments. The data represent the ratio of the signal intensity of Oma1 KO to the wild type of the listed individual polypeptides set to the level of mt-Nd2, whose abundance does not differ. a.u., arbitrary units.