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Human Dec. 2013 (GRCh38/hg38) Browser Sequences
 
Enter a position, or click on a sequence name to view the entire sequence in the genome browser.

position

Sequence name   Length (bp) including gaps  
chr1 248,956,422  
chr2 242,193,529  
chr3 198,295,559  
chr4 190,214,555  
chr5 181,538,259  
chr6 170,805,979  
chr7 159,345,973  
chrX 156,040,895  
chr8 145,138,636  
chr9 138,394,717  
chr11 135,086,622  
chr10 133,797,422  
chr12 133,275,309  
chr13 114,364,328  
chr14 107,043,718  
chr15 101,991,189  
chr16 90,338,345  
chr17 83,257,441  
chr18 80,373,285  
chr20 64,444,167  
chr19 58,617,616  
chrY 57,227,415  
chr22 50,818,468  
chr21 46,709,983  
chr15_KI270905v1_alt 5,161,414  
chr6_GL000256v2_alt 4,929,269  
chr6_GL000254v2_alt 4,827,813  
chr6_GL000251v2_alt 4,795,265  
chr6_GL000253v2_alt 4,677,643  
chr6_GL000250v2_alt 4,672,374  
chr6_GL000255v2_alt 4,606,388  
chr6_GL000252v2_alt 4,604,811  
chr17_KI270857v1_alt 2,877,074  
chr16_KI270853v1_alt 2,659,700  
chr16_KI270728v1_random 1,872,759  
chr17_GL000258v2_alt 1,821,992  
chr5_GL339449v2_alt 1,612,928  
chr14_KI270847v1_alt 1,511,111  
chr17_KI270908v1_alt 1,423,190  
chr14_KI270846v1_alt 1,351,393  
chr5_KI270897v1_alt 1,144,418  
chr7_KI270803v1_alt 1,111,570  
chr19_GL949749v2_alt 1,091,841  
chr19_KI270938v1_alt 1,066,800  
chr19_GL949750v2_alt 1,066,390  
chr19_GL949748v2_alt 1,064,304  
chr19_GL949751v2_alt 1,002,683  
chr19_GL949746v1_alt 987,716  
chr19_GL949752v1_alt 987,100  
chr8_KI270821v1_alt 985,506  
chr1_KI270763v1_alt 911,658  
chr6_KI270801v1_alt 870,480  
chr19_GL949753v2_alt 796,479  
chr19_GL949747v2_alt 729,520  
chr8_KI270822v1_alt 624,492  
chr4_GL000257v2_alt 586,476  
chr12_KI270904v1_alt 572,349  
chr4_KI270925v1_alt 555,799  
chr15_KI270852v1_alt 478,999  
chr15_KI270727v1_random 448,248  
chr9_KI270823v1_alt 439,082  
chr15_KI270850v1_alt 430,880  
chr1_KI270759v1_alt 425,601  
chr12_GL877876v1_alt 408,271  
chrUn_KI270442v1 392,061  
chr17_KI270862v1_alt 391,357  
chr15_GL383555v2_alt 388,773  
chr19_GL383573v1_alt 385,657  
chr4_KI270896v1_alt 378,547  
chr4_GL383528v1_alt 376,187  
chr17_GL383563v3_alt 375,691  
chr8_KI270810v1_alt 374,415  
chr1_GL383520v2_alt 366,580  
chr1_KI270762v1_alt 354,444  
chr15_KI270848v1_alt 327,382  
chr17_KI270909v1_alt 325,800  
chr14_KI270844v1_alt 322,166  
chr8_KI270900v1_alt 318,687  
chr10_GL383546v1_alt 309,802  
chr13_KI270838v1_alt 306,913  
chr8_KI270816v1_alt 305,841  
chr22_KI270879v1_alt 304,135  
chr8_KI270813v1_alt 300,230  
chr11_KI270831v1_alt 296,895  
chr15_GL383554v1_alt 296,527  
chr8_KI270811v1_alt 292,436  
chr18_GL383567v1_alt 289,831  
chrX_KI270880v1_alt 284,869  
chr8_KI270812v1_alt 282,736  
chr19_KI270921v1_alt 282,224  
chr17_KI270729v1_random 280,839  
chr17_JH159146v1_alt 278,131  
chrX_KI270913v1_alt 274,009  
chr6_KI270798v1_alt 271,782  
chr7_KI270808v1_alt 271,455  
chr22_KI270876v1_alt 263,666  
chr15_KI270851v1_alt 263,054  
chr22_KI270875v1_alt 259,914  
chr1_KI270766v1_alt 256,271  
chr19_KI270882v1_alt 248,807  
chr3_KI270778v1_alt 248,252  
chr15_KI270849v1_alt 244,917  
chr4_KI270786v1_alt 244,096  
chr12_KI270835v1_alt 238,139  
chr17_KI270858v1_alt 235,827  
chr19_KI270867v1_alt 233,762  
chr16_KI270855v1_alt 232,857  
chr8_KI270926v1_alt 229,282  
chr5_GL949742v1_alt 226,852  
chr3_KI270780v1_alt 224,108  
chr17_GL383565v1_alt 223,995  
chr2_KI270774v1_alt 223,625  
chr4_KI270790v1_alt 220,246  
chr11_KI270927v1_alt 218,612  
chr19_KI270932v1_alt 215,732  
chr11_KI270903v1_alt 214,625  
chr2_KI270894v1_alt 214,158  
chr14_GL000225v1_random 211,173  
chrUn_KI270743v1 210,658  
chr11_KI270832v1_alt 210,133  
chr7_KI270805v1_alt 209,988  
chr4_GL000008v2_random 209,709  
chr7_KI270809v1_alt 209,586  
chr19_KI270887v1_alt 209,512  
chr4_KI270789v1_alt 205,944  
chr3_KI270779v1_alt 205,312  
chr19_KI270914v1_alt 205,194  
chr19_KI270886v1_alt 204,239  
chr11_KI270829v1_alt 204,059  
chr14_GL000009v2_random 201,709  
chr21_GL383579v2_alt 201,197  
chr11_JH159136v1_alt 200,998  
chr19_KI270930v1_alt 200,773  
chrUn_KI270747v1 198,735  
chr18_GL383571v1_alt 198,278  
chr19_KI270920v1_alt 198,005  
chr6_KI270797v1_alt 197,536  
chr3_KI270935v1_alt 197,351  
chr17_KI270861v1_alt 196,688  
chr15_KI270906v1_alt 196,384  
chr5_KI270791v1_alt 195,710  
chr14_KI270722v1_random 194,050  
chr16_GL383556v1_alt 192,462  
chr13_KI270840v1_alt 191,684  
chr14_GL000194v1_random 191,469  
chr11_JH159137v1_alt 191,409  
chr19_KI270917v1_alt 190,932  
chr7_KI270899v1_alt 190,869  
chr19_KI270923v1_alt 189,352  
chr10_KI270825v1_alt 188,315  
chr19_GL383576v1_alt 188,024  
chr19_KI270922v1_alt 187,935  
chrUn_KI270742v1 186,739  
chr22_KI270878v1_alt 186,262  
chr19_KI270929v1_alt 186,203  
chr11_KI270826v1_alt 186,169  
chr6_KB021644v2_alt 185,823  
chr17_GL000205v2_random 185,591  
chr1_KI270765v1_alt 185,285  
chr19_KI270916v1_alt 184,516  
chr19_KI270890v1_alt 184,499  
chr3_KI270784v1_alt 184,404  
chr12_GL383551v1_alt 184,319  
chr20_KI270870v1_alt 183,433  
chrUn_GL000195v1 182,896  
chr1_GL383518v1_alt 182,439  
chr22_KI270736v1_random 181,920  
chr10_KI270824v1_alt 181,496  
chr14_KI270845v1_alt 180,703  
chr3_GL383526v1_alt 180,671  
chr13_KI270839v1_alt 180,306  
chr22_KI270733v1_random 179,772  
chrUn_GL000224v1 179,693  
chr10_GL383545v1_alt 179,254  
chrUn_GL000219v1 179,198  
chr5_KI270792v1_alt 179,043  
chr17_KI270860v1_alt 178,921  
chr19_GL000209v2_alt 177,381  
chr11_KI270830v1_alt 177,092  
chr9_KI270719v1_random 176,845  
chrUn_GL000216v2 176,608  
chr22_KI270928v1_alt 176,103  
chr1_KI270712v1_random 176,043  
chr6_KI270800v1_alt 175,808  
chr1_KI270706v1_random 175,055  
chr2_KI270776v1_alt 174,166  
chr18_KI270912v1_alt 174,061  
chr3_KI270777v1_alt 173,649  
chr5_GL383531v1_alt 173,459  
chr3_JH636055v2_alt 173,151  
chr14_KI270725v1_random 172,810  
chr5_KI270796v1_alt 172,708  
chr9_GL383541v1_alt 171,286  
chr19_KI270885v1_alt 171,027  
chr19_KI270919v1_alt 170,701  
chr19_KI270889v1_alt 170,698  
chr19_KI270891v1_alt 170,680  
chr19_KI270915v1_alt 170,665  
chr19_KI270933v1_alt 170,537  
chr19_KI270883v1_alt 170,399  
chr19_GL383575v2_alt 170,222  
chr19_KI270931v1_alt 170,148  
chr12_GL383550v2_alt 169,178  
chr13_KI270841v1_alt 169,134  
chrUn_KI270744v1 168,472  
chr18_KI270863v1_alt 167,999  
chr18_GL383569v1_alt 167,950  
chr12_GL877875v1_alt 167,313  
chr21_KI270874v1_alt 166,743  
chr3_KI270924v1_alt 166,540  
chr1_KI270761v1_alt 165,834  
chr3_KI270937v1_alt 165,607  
chr22_KI270734v1_random 165,050  
chr18_GL383570v1_alt 164,789  
chr5_KI270794v1_alt 164,558  
chr4_GL383527v1_alt 164,536  
chrUn_GL000213v1 164,239  
chr3_KI270936v1_alt 164,170  
chr3_KI270934v1_alt 163,458  
chr9_GL383539v1_alt 162,988  
chr3_KI270895v1_alt 162,896  
chr22_GL383582v2_alt 162,811  
chr3_KI270782v1_alt 162,429  
chr1_KI270892v1_alt 162,212  
chrUn_GL000220v1 161,802  
chr2_KI270767v1_alt 161,578  
chr2_KI270715v1_random 161,471  
chr2_KI270893v1_alt 161,218  
chrUn_GL000218v1 161,147  
chr18_GL383572v1_alt 159,547  
chr8_KI270817v1_alt 158,983  
chr4_KI270788v1_alt 158,965  
chrUn_KI270749v1 158,759  
chr7_KI270806v1_alt 158,166  
chr7_KI270804v1_alt 157,952  
chr18_KI270911v1_alt 157,710  
chrUn_KI270741v1 157,432  
chr17_KI270910v1_alt 157,099  
chr19_KI270884v1_alt 157,053  
chr19_GL383574v1_alt 155,864  
chr19_KI270888v1_alt 155,532  
chr3_GL000221v1_random 155,397  
chr11_GL383547v1_alt 154,407  
chr2_KI270716v1_random 153,799  
chr12_GL383553v2_alt 152,874  
chr6_KI270799v1_alt 152,148  
chr22_KI270731v1_random 150,754  
chrUn_KI270751v1 150,742  
chrUn_KI270750v1 148,850  
chr8_KI270818v1_alt 145,606  
chrX_KI270881v1_alt 144,206  
chr21_KI270873v1_alt 143,900  
chr2_GL383521v1_alt 143,390  
chr8_KI270814v1_alt 141,812  
chr12_GL383552v1_alt 138,655  
chrUn_KI270519v1 138,126  
chr2_KI270775v1_alt 138,019  
chr17_KI270907v1_alt 137,721  
chrUn_GL000214v1 137,718  
chr8_KI270901v1_alt 136,959  
chr2_KI270770v1_alt 136,240  
chr16_KI270854v1_alt 134,193  
chr8_KI270819v1_alt 133,535  
chr17_GL383564v2_alt 133,151  
chr2_KI270772v1_alt 133,041  
chr8_KI270815v1_alt 132,244  
chr5_KI270795v1_alt 131,892  
chr5_KI270898v1_alt 130,957  
chr20_GL383577v2_alt 128,386  
chr1_KI270708v1_random 127,682  
chr7_KI270807v1_alt 126,434  
chr5_KI270793v1_alt 126,136  
chr6_GL383533v1_alt 124,736  
chr2_GL383522v1_alt 123,821  
chr19_KI270918v1_alt 123,111  
chr12_GL383549v1_alt 120,804  
chr2_KI270769v1_alt 120,616  
chr4_KI270785v1_alt 119,912  
chr12_KI270834v1_alt 119,498  
chr7_GL383534v2_alt 119,183  
chr20_KI270869v1_alt 118,774  
chr21_GL383581v2_alt 116,689  
chr3_KI270781v1_alt 113,034  
chr17_KI270730v1_random 112,551  
chrUn_KI270438v1 112,505  
chr4_KI270787v1_alt 111,943  
chr18_KI270864v1_alt 111,737  
chr2_KI270771v1_alt 110,395  
chr1_GL383519v1_alt 110,268  
chr2_KI270768v1_alt 110,099  
chr1_KI270760v1_alt 109,528  
chr3_KI270783v1_alt 109,187  
chr17_KI270859v1_alt 108,763  
chr11_KI270902v1_alt 106,711  
chr18_GL383568v1_alt 104,552  
chr22_KI270737v1_random 103,838  
chr13_KI270843v1_alt 103,832  
chr22_KI270877v1_alt 101,331  
chr5_GL383530v1_alt 101,241  
chr11_KI270721v1_random 100,316  
chr22_KI270738v1_random 99,375  
chr22_GL383583v2_alt 96,924  
chr2_GL582966v2_alt 96,131  
chrUn_KI270748v1 93,321  
chrUn_KI270435v1 92,983  
chr5_GL000208v1_random 92,689  
chrUn_KI270538v1 91,309  
chr17_GL383566v1_alt 90,219  
chr16_GL383557v1_alt 89,672  
chr17_JH159148v1_alt 88,070  
chr5_GL383532v1_alt 82,728  
chr21_KI270872v1_alt 82,692  
chrUn_KI270756v1 79,590  
chr6_KI270758v1_alt 76,752  
chr12_KI270833v1_alt 76,061  
chr6_KI270802v1_alt 75,005  
chr21_GL383580v2_alt 74,653  
chr22_KB663609v1_alt 74,013  
chr22_KI270739v1_random 73,985  
chr9_GL383540v1_alt 71,551  
chrUn_KI270757v1 71,251  
chr2_KI270773v1_alt 70,887  
chr17_JH159147v1_alt 70,345  
chr11_KI270827v1_alt 67,707  
chr1_KI270709v1_random 66,860  
chrUn_KI270746v1 66,486  
chr16_KI270856v1_alt 63,982  
chr21_GL383578v2_alt 63,917  
chrUn_KI270753v1 62,944  
chr19_KI270868v1_alt 61,734  
chr9_GL383542v1_alt 60,032  
chr20_KI270871v1_alt 58,661  
chr12_KI270836v1_alt 56,134  
chr19_KI270865v1_alt 52,969  
chr1_KI270764v1_alt 50,258  
chrUn_KI270589v1 44,474  
chr14_KI270726v1_random 43,739  
chr19_KI270866v1_alt 43,156  
chr22_KI270735v1_random 42,811  
chr1_KI270711v1_random 42,210  
chrUn_KI270745v1 41,891  
chr1_KI270714v1_random 41,717  
chr22_KI270732v1_random 41,543  
chr1_KI270713v1_random 40,745  
chrUn_KI270754v1 40,191  
chr1_KI270710v1_random 40,176  
chr12_KI270837v1_alt 40,090  
chr9_KI270717v1_random 40,062  
chr14_KI270724v1_random 39,555  
chr9_KI270720v1_random 39,050  
chr14_KI270723v1_random 38,115  
chr9_KI270718v1_random 38,054  
chrUn_KI270317v1 37,690  
chr13_KI270842v1_alt 37,287  
chrY_KI270740v1_random 37,240  
chrUn_KI270755v1 36,723  
chr8_KI270820v1_alt 36,640  
chr1_KI270707v1_random 32,032  
chrUn_KI270579v1 31,033  
chrUn_KI270752v1 27,745  
chrUn_KI270512v1 22,689  
chrUn_KI270322v1 21,476  
chrM 16,569  
chrUn_GL000226v1 15,008  
chrUn_KI270311v1 12,399  
chrUn_KI270366v1 8,320  
chrUn_KI270511v1 8,127  
chrUn_KI270448v1 7,992  
chrUn_KI270521v1 7,642  
chrUn_KI270581v1 7,046  
chrUn_KI270582v1 6,504  
chrUn_KI270515v1 6,361  
chrUn_KI270588v1 6,158  
chrUn_KI270591v1 5,796  
chrUn_KI270522v1 5,674  
chrUn_KI270507v1 5,353  
chrUn_KI270590v1 4,685  
chrUn_KI270584v1 4,513  
chrUn_KI270320v1 4,416  
chrUn_KI270382v1 4,215  
chrUn_KI270468v1 4,055  
chrUn_KI270467v1 3,920  
chrUn_KI270362v1 3,530  
chrUn_KI270517v1 3,253  
chrUn_KI270593v1 3,041  
chrUn_KI270528v1 2,983  
chrUn_KI270587v1 2,969  
chrUn_KI270364v1 2,855  
chrUn_KI270371v1 2,805  
chrUn_KI270333v1 2,699  
chrUn_KI270374v1 2,656  
chrUn_KI270411v1 2,646  
chrUn_KI270414v1 2,489  
chrUn_KI270510v1 2,415  
chrUn_KI270390v1 2,387  
chrUn_KI270375v1 2,378  
chrUn_KI270420v1 2,321  
chrUn_KI270509v1 2,318  
chrUn_KI270315v1 2,276  
chrUn_KI270302v1 2,274  
chrUn_KI270518v1 2,186  
chrUn_KI270530v1 2,168  
chrUn_KI270304v1 2,165  
chrUn_KI270418v1 2,145  
chrUn_KI270424v1 2,140  
chrUn_KI270417v1 2,043  
chrUn_KI270508v1 1,951  
chrUn_KI270303v1 1,942  
chrUn_KI270381v1 1,930  
chrUn_KI270529v1 1,899  
chrUn_KI270425v1 1,884  
chrUn_KI270396v1 1,880  
chrUn_KI270363v1 1,803  
chrUn_KI270386v1 1,788  
chrUn_KI270465v1 1,774  
chrUn_KI270383v1 1,750  
chrUn_KI270384v1 1,658  
chrUn_KI270330v1 1,652  
chrUn_KI270372v1 1,650  
chrUn_KI270548v1 1,599  
chrUn_KI270580v1 1,553  
chrUn_KI270387v1 1,537  
chrUn_KI270391v1 1,484  
chrUn_KI270305v1 1,472  
chrUn_KI270373v1 1,451  
chrUn_KI270422v1 1,445  
chrUn_KI270316v1 1,444  
chrUn_KI270340v1 1,428  
chrUn_KI270338v1 1,428  
chrUn_KI270583v1 1,400  
chrUn_KI270334v1 1,368  
chrUn_KI270429v1 1,361  
chrUn_KI270393v1 1,308  
chrUn_KI270516v1 1,300  
chrUn_KI270389v1 1,298  
chrUn_KI270466v1 1,233  
chrUn_KI270388v1 1,216  
chrUn_KI270544v1 1,202  
chrUn_KI270310v1 1,201  
chrUn_KI270412v1 1,179  
chrUn_KI270395v1 1,143  
chrUn_KI270376v1 1,136  
chrUn_KI270337v1 1,121  
chrUn_KI270335v1 1,048  
chrUn_KI270378v1 1,048  
chrUn_KI270379v1 1,045  
chrUn_KI270329v1 1,040  
chrUn_KI270419v1 1,029  
chrUn_KI270336v1 1,026  
chrUn_KI270312v1 998  
chrUn_KI270539v1 993  
chrUn_KI270385v1 990  
chrUn_KI270423v1 981  
chrUn_KI270392v1 971  
chrUn_KI270394v1 970  
Total: 455 3,209,286,105

About the Human Dec. 2013 (GRCh38/hg38) assembly (sequences)
 
Human
Homo sapiens
(Graphic courtesy of CBSE)

UCSC Genome Browser assembly ID: hg38
Sequencing/Assembly provider ID: Genome Reference Consortium Human GRCh38 (GCA_000001405.15)
Assembly date: Dec. 2013
Assembly accession: GCA_000001405.15
NCBI Genome ID: 51 (Homo sapiens (human))
NCBI Assembly ID: 883148 (GRCh38, GCA_000001405.15)
BioProject ID: PRJNA31257


Search the assembly:

  • By position or search term: Use the "position or search term" box to find areas of the genome associated with many different attributes, such as a specific chromosomal coordinate range; mRNA, EST, or STS marker names; or keywords from the GenBank description of an mRNA. More information, including sample queries.
  • By gene name: Type a gene name into the "search term" box, choose your gene from the drop-down list, then press "submit" to go directly to the assembly location associated with that gene. More information.
  • By track type: Click the "track search" button to find Genome Browser tracks that match specific selection criteria. More information.


Download sequence and annotation data:


Assembly Details

The GRCh38 assembly is the first major revision of the human genome released in more than four years. As with the previous GRCh37 assembly, the Genome Reference Consortium (GRC) is now the primary source for human genome assembly data submitted to GenBank. Beginning with this release, the UCSC Genome Browser version numbers for the human assemblies now match those of the GRC to minimize version confusion. Hence, the GRCh38 assembly is referred to as "hg38" in the Genome Browser datasets and documentation. For a glossary of assembly-related terms, see the GRC Assembly Terminology page.

GRCh38 Highlights

  • Alternate sequences - Several human chromosomal regions exhibit sufficient variability to prevent adequate representation by a single sequence. To address this, the GRCh38 assembly provides alternate sequence for selected variant regions through the inclusion of alternate loci scaffolds (or alt loci). Alt loci are separate accessioned sequences that are aligned to reference chromosomes. This assembly contains 261 alt loci, many of which are associated with the LRC/KIR area of chr19 and the MHC region on chr6. See the sequences page for a complete list of the reference chromosomes and alternate sequences in GRCh38.
  • Centromere representation - Debuting in this release, the large megabase-sized gaps that represented centromeric regions in previous assemblies have been replaced by sequences from centromere models created by Karen Miga et al., using centromere databases developed during her work in the Willard lab at Duke University (now at the University of Chicago) and analysis software developed while working in the Kent lab at UCSC. The models, which provide the approximate repeat number and order for each centromere, will be useful for read mapping and variation studies.
  • Mitochondrial genome - The mitochondrial reference sequence included in the GRCh38 assembly (termed "chrM" in the UCSC Genome Browser) is the Revised Cambridge Reference Sequence (rCRS) from MITOMAP with GenBank accession number J01415.2 and RefSeq accession number NC_012920.1. This differs from the chrM sequence (RefSeq accession number NC_001807) provided by the Genome Browser for hg19, which was not updated when the GRCh37 assembly later transitioned to the new version.
  • Sequence updates - Several erroneous bases and misassembled regions in GRCh37 have been corrected in the GRCh38 assembly, and more than 100 gaps have been filled or reduced. Much of the data used to improve the reference sequence was obtained from other genome sequencing and analysis projects, such as the 1000 Genomes Project.
  • Analysis set - The GRCh38 assembly offers an "analysis set" that was created to accommodate next generation sequencing read alignment pipelines. To avoid false mapping of reads, duplicate copies of centromeric arrays and WGS on several chromosomes have been hard-masked with Ns. The two PAR regions on chromosome Y have also been hard-masked, and the Epstein-Barr virus sequence has been added as a decoy to attract contamination in samples. Two versions of the analysis set are available on our downloads page: one without the alternate chromosomes from this assembly, and one that includes them.

Chromosome naming conventions
UCSC has introduced some slight changes to the Genome Browser chromosome naming scheme with this release:

  • Haplotype chromosome, unplaced contig and unlocalized contig names now include their NCBI accession number (e.g., chr6_GL000256v2_alt)
  • The "v2" at the end of the accession number indicates the NCBI version number
  • Haplotype chromosome names consist of the chromosome number, followed by the NCBI accession number, followed by "alt"
  • Unlocalized contig names consist of the chromosome number, followed by the NCBI accession number, followed by "random"
  • Unplaced contig names (contigs whose associated chromosome is not known) consist of "chrUn" followed by the NCBI accession number

Pseudoautosomal regions
The Y chromosome in this assembly contains two pseudoautosomal regions (PARs) that were taken from the corresponding regions in the X chromosome and are exact duplicates:

chrY:10,000-2,781,479 and chrY:56,887,902-57,217,415
chrX:10,000-2,781,479 and chrX:155,701,382-156,030,895

Assembly statistics
For a detailed set of statistics about this assembly, see the GRCh38 GenBank record.

NumberHaplotypesUnplaced Contigs
chr1129
chr2152
chr3161
chr4111
chr5131
chr6160
chr790
chr8160
chr954
chr1040
chr11121
chr12130
chr1360
chr1448
chr1591
chr1661
chr17183
chr18100
chr19430
chr2040
chr2170
chr2299
chrX30
chrY01
chrM00

TypeTotal
chromosomes25
haplotypes261
unlocalized contigs42
unplaced contigs127
Total455

For more information about the files included in the GRCh38 GenBank submission, see the GRCh38 README. Bulk downloads of the sequence and annotation data may be obtained from the Genome Browser FTP server or the Downloads page. The annotation tracks for this browser were generated by UCSC and collaborators worldwide.

References

Miga KH, Newton Y, Jain M, Altemose N, Willard HF, Kent WJ. Centromere reference models for human chromosomes X and Y satellite arrays. Genome Res. 2014 Apr;24(4):697-707. Epub 2014 Feb 5.