This track shows the differences between the GRCh37 (hg19) and GRCh38 (hg38) human genome
assemblies, indicating hg19 contigs (or portions of contigs) that were not carried forward to the
The following color/score key is used:
|type of change from hg19 to hg38|
| ||0||hg19 contig dropped in
the construction of the hg38 assembly|
| ||500||Different portions
of this same contig used in the construction of hg38 and hg19 assemblies|
| ||1000||Contig updated in hg38 to
correct sequence errors present in hg19 version|
Use the score filter to select which categories to show in the display.
The contig coordinates were extracted from the AGP files for both assemblies.
Contigs that matched the same name, same version, and the same specific
portion of sequence in both assemblies were considered identical between the two
assemblies and were excluded from this data set. The remaining contigs are shown
in this track.
The data and presentation of this track were prepared by
Hiram Clawson, UCSC Genome