Telomere sequence gaps. Distance from terminal (TTAGGG)n tract to the subtelomeric sequence assemblies for each telomere is indicated. (Blue dot) Subtelomeric assemblies adjoin terminal (TTAGGG)n tract for a reference telomere; (green dot) subtelomeric assemblies end within 20 kb of the terminal (TTAGGG)n tract; (magenta dot) subtelomeric assemblies end between 20 and 70 kb from the terminal (TTAGGG)n tract; (yellow dot) a half-YAC clone has not been identified, the sequence assembly for this telomere extends from single-copy DNA into the subtelomeric repeat region, but the size of the subtelomeric repeat region has not been determined. (Black rectangles) The five telomeres from the p-arms of the acrocentric chromosomes, which contain mainly repetitive DNA unstable in yeast and bacteria, were not characterized as part of this study.