The effect of age on the number of heteroplasmies in the unrelated SardiNIA sequencing project participants.

<p>The number of heteroplasmies increases with age with different (colored) minor allele fraction (MAF) thresholds. Each line plots the expected number of heteroplasmies based on the Poisson loglinear model against age at an MAF threshold; while the points represent the observed mean number of heteroplasmies in each age group (<40, 40–50, 50–60, 60–70, 70–80, >80).</p>