Fig. 1: Distributions of repeat tract lengths (DRLs) by motif length and across phylogenies.

a Counts of repeats in human T2T genome pooled by motif unit length (e.g., unit length 1 pools DRLs for A/T and C/G). Dashed lines represent counts in a randomly shuffled human genome sequence. Canonical centromeric and telomeric motifs are excluded from unit lengths 5 and 6, respectively, due to qualitative differences in the DRLs. b Normalized DRLs of mononucleotide-A repeats in mammals (blue; n = 315), primates (orange; n = 37) and hominids (green; n = 6). (See Supplementary Fig. 3 for other motifs.) Counts are necessarily normalized to account for different genome lengths (see “Methods” section, Supplementary Fig. 2). Solid line indicates median values per length bin. Phylogenies are inclusive (e.g., primates are included as a subset of mammals). Thin lines show individual species. Similarity within phylogenies suggests long-term stability of the DRLs.