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Table 2 Comparison of chromosome lengths and gaps between Ash1 and GRCh38. Chromosome lengths exclude all “N” characters. Every sequence of Ns was counted as a gap except for leading and trailing Ns. Several GRCh38 chromosomes begin or end with lengthy sequences of Ns numbering millions of bases; these were not counted as gaps here

From: Assembly and annotation of an Ashkenazi human reference genome

ChrAsh1 v1.7GRCh38.p13
Length (bp)Gap lengthNo. of gapsLength (bp)Gap lengthNo. of gaps
1232,280,04518,214,772193230,481,01418,455,408164
2241,581,4441,282,52766240,548,2371,625,29224
3199,411,97676,23857198,100,142125,41720
4190,408,510301,99918189,752,667441,88816
5181,608,321176,94262181,265,378202,88135
6170,304,801502,30023170,078,523607,45613
7160,669,899205,71166158,970,135355,83815
8144,953,907151,70015144,768,136250,50010
9122,110,71216,459,698110121,790,55316,534,16441
10134,496,302289,02241133,262,998514,42442
11135,108,547191,39272134,533,742482,88015
12135,338,73136,44082133,137,819117,49025
1398,916,572129,8425797,983,128371,20018
1490,842,875254,9994990,568,149315,56923
1591,928,716336,4273484,641,325339,86417
1682,665,1948,252,1976481,805,9448,412,40119
1783,177,337171,6313082,920,216267,22534
1881,463,36466,7197280,089,605163,68059
1967,231,98298,2781658,440,758106,8587
2065,005,954106,29912163,944,257329,91088
2140,375,064758,5898040,088,6221,601,36147
2242,624,612729,99911739,159,7821,138,68642
X153,528,413671,67138154,893,0341,127,86127
Y27,085,37233,413,2573326,415,04830,792,36754
Total2,973,118,65082,878,64915162,937,639,21284,680,620855