This track shows alignments of fix patch sequences to
main chromosome sequences in the reference genome assembly.
When errors are corrected in the reference genome assembly, the
Genome Reference Consortium
(GRC) adds fix patch sequences containing the corrected regions.
This strikes a balance between providing the most complete and correct genome
sequence, while maintaining stable chromosome coordinates for the original assembly
Fix patches are often associated with incident reports displayed in the GRC Incidents
Display Conventions and Configuration
This track follows the display conventions for
PSL alignment tracks.
Mismatching bases are highlighted in red.
Several types of alignment gap may also be colored;
for more information, see
Alignment Insertion/Deletion Display Options.
The alignments were provided by NCBI as GFF files and translated into the PSL
representation for browser display by UCSC.