A Autoradiography of in-organello mitochondrial translation products derived from HEK293 wild-type cells in the presence of tobramycin, incorporation of 35S-Met and 35S-Cys in MT-CO1 protein. Following in-organello translation proteins were immunoprecipitated and analyzed by autoradiography. Lane 1, 3: controls; lanes 2, 4: in-organello translation in the presence of 1000 µM tobramycin. MT-CO1 bands were quantified and ratio of 35S-Cys / 35S-Met calculated, the 35S-Cys / 35S-Met ratio in the absence of tobramycin was set as 1 (n=3), error bars indicate SEM. 