Hg38 Diff Track Settings
Contigs Dropped or Changed from GRCh37(hg19) to GRCh38(hg38)   (All Mapping and Sequencing tracks)

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Data last updated: 2014-02-13


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 newer assembly.

The following color/score key is used:

type of change from hg19 to hg38
 0hg19 contig dropped in the construction of the hg38 assembly
 500Different portions of this same contig used in the construction of hg38 and hg19 assemblies
 1000Contig updated in hg38 to correct sequence errors present in hg19 version

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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 Browser engineering.