Fig. 2From: Is population frequency a useful criterion to assign pathogenicity to newly described mitochondrial DNA variants?Analysis of mitochondrial DNA single nucleotide substitutions in protein genes. Very-rare, population frequency ≤ 1/100,000 (< 0.001%). A Absolute frequencies of mitochondrial DNA homoplasmic (heteroplasmic) variants. P < 0.00001 (P < 0.00001) (Fisher’s exact test). B Conservation index. Means ± Standard Deviations are shown. Asterisk, P ≤ 0.0335 (Unpaired t-test)Back to article page