MT-ND4 and B-cell chronic lymphocytic leukemia: The mtDNA in CLL cybrid contained six heteroplasmy SNPs, which are listed as follows: m.1598G>A (rs3135027, MT-RNR1); m.1703C>T (rs28527344, MT-RNR2); m.1719G>A (rs3928305, MT-RNR2); m8836A>G (no rs#, MT-ATP6); m.11928A>G (no rs#, MT-ND4); and m.16390G>A (rs4137895, MT-DLOOP).