Fig 1: Western blot image of frataxin standards and mouse tissue samples. (A) Millipore Sigma MAB1594. (B) LifeSpan Biosciences LS-C197243. Lane 1: Monkey mature His-tag-frataxin standard (a; 500 pg; 18.3 kDa); lane 2: Human mature His-tag-frataxin standard (500 pg; 15.3 kDa); lane 3: Mouse mature His-tag-frataxin standard (500 pg; 15.4 kDa); lane 4: Mouse intermediate His-tag-frataxin standard (500 pg, 22.4 kDa); lane 5: Mouse heart homogenate (200 µg); lane 6: Mouse heart homogenate (200 µg) + mouse mature His-tag-frataxin standard (500 pg). b: Expected mobility for mouse mature frataxin (14.3 kDa). c: Expected mobility for mouse full-length frataxin (22.9 kDa).