Fig. (6) PKAα Cat expression in the human placental mitochondrial fractions. PKAα Cat expression was detected using SDS-PAGE, Western blotting and autoradiography (Exposure time = 1 minute). The PKAα Cat immuno-reactive bands are shown in A), the intensities of the 44 kDa PKAα Cat bands are shown in B). The experi-ment was repeated for a total of three different placentae with similar results.