NAD(P)H DH activities measured for intact, isolated mitochondria from wt and insertion mutation seed line, SAIL_779_G05, Arabidopsis plants. A, External NADH DH; B, External NADPH DH; C, Outer membrane NADH DH; D, Outer membrane NADPH DH. All rates have been expressed as a ratio of succinate-DCPIP reductase activity for the same individual mitochondrial preparation (as described in Fig. 2). The means of these data are shown. Error bars = se of the mean. A to C, n = 3; D, n = 2.