Mitochondrial ribosomes contain 16S rRNA (large subunit) and 12S rRNA (small subunit) that are encoded in the mitochondrial genome and produced by processing of a long H strand transcript (reviewed in Van Haute et al. 2015). Enzymes encoded in the nucleus and acting in the mitochondrial matrix modify 5 nucleotides in the 12S RNA and 4 nucleotides in the 16S rRNA (reviewed in Van Haute et al. 2015).
Van Haute, L,