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For point heteroplasmy (PHP) events observed in buccal references (grouped in PHP level categories on the x-axis), the proportion of hairs in various PHP level categories (see colour coding) is displayed (total number of investigated occurrences in hairs is indicated as n on the x-axis). The figure is divided in (A). Data for positions located within, or directly adjacent to, C-stretches are displayed separately (B) from non-C-stretch-related positions (A).
