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Figure 2 (A) Reverse transcriptase-polymerase chain reaction analysis of messenger ribonucleic acid (mRNA) expression of mitochondrially encoded subunits of respiratory chain complexes (C-I, C-III, C-IV) in human failing left ventricular myocardium given as percent of donor values. Data were obtained by densitometric quantification of the negatives of gel-images and are given as mean ± SEM. (B) Representative Northern blot analysis of mitochondrially encoded ND1 mRNA and nuclear encoded 18S ribosomal ribonucleic acid (rRNA) in left ventricular myocardium of donors and terminally failing patients.