Northern blot analyses and relative quantification of mtRNA transcripts in control and Tefm knockout mouse hearts at the age of 4 and 8 weeks (n= 12 mice at each time-point for each group). 18S rRNA and 5.8S rRNA were used as loading controls, respectively. HSP transcripts: 12S rRNA 4 weeks P= 0.005966044, 8 weeks P= 0.0806819; 16S rRNA 4 weeks P= 0.000223004, 8 weeks P= 0.00243443; Nd1 4 weeks P= 0.0352088, 8 weeks P= 0.000344158; Cox1 4 weeks P= 0.000353895, 8 weeks P= 0.00145773; Cox2 4 weeks P= 0.0145193, 8 weeks P= 0.00578484; Cox3 4 weeks P= 0.00834317, 8 weeks P= 0.000392364; Nd5/Cyb 4 weeks P= 0.0010185, 8 weeks P= 0.00153049; Nd5 4 weeks P= 0.024621, 8 weeks P= 7.38074E-05; Cyb 4 weeks P= 3.46175E-06, 8 weeks P= 0.000991942; LSP transcript: Nd6 4 weeks P= 0.000162704, 8 weeks P= 0.000187855. (E) HSP transcripts: Tf 4 weeks P= 0.0297685, 8 weeks P= 0. 000212544; Tv 4 weeks P= 0.842023, 8 weeks P= 0.269231; Tl1 4 weeks P= 0.00921072, 8 weeks P= 0.000430068; Tm 4 weeks P= 0.0084742, 8 weeks P= 0.000142524; Tk 4 weeks P= 0.00297015, 8 weeks P= 0.00010425; Ts2 4 weeks P= 0.0128829, 8 weeks P= 2.27321E-05; Tl2 4 weeks P= 0.00701324, 8 weeks P= 0.000411549; Tt 4 weeks P= 0.00572118, 8 weeks P= 0.000807943; LSP transcript: Tp 4 weeks P= 0.0427191, 8 weeks P= 0.0483328; Te 4 weeks P= 0.464031, 8 weeks P= 0.13412; Ts1 4 weeks P= 0.0382215, 8 weeks P= 0.000478237; Tc 4 weeks P= 0.00418795, 8 weeks P= 0.000287525; Tn 4 weeks P= 0.00531668, 8 weeks P= 0.000374367; Ta 4 weeks P= 0.00247257, 8 weeks P= 0.000564597; Tq 4 weeks P= 0.00385524, 8 weeks P= 0.000727981. 