This track shows regions that have no GRCh38 LASTZ all alignment chain coverage chains (GRCh38 LASTZ All Alignment Chains track). Since these alignments have limited filtering, it is likely to fail to identify duplications that are not in not in GRCh38. It will also incorrectly show regions that are unalignable as unique.
Base-wise negation of LAST all alignment chains using featureBits.
Kent WJ, Baertsch R, Hinrichs A, Miller W, Haussler D. Evolution's cauldron: duplication, deletion, and rearrangement in the mouse and human genomes. Proc Natl Acad Sci U S A. 2003 Sep 30;100(20):11484-9. PMID: 14500911; PMC: PMC208784
Harris RS. Improved pairwise alignment of genomic DNA. Ph.D. Thesis. Pennsylvania State University, USA. 2007.
Schwartz S, Kent WJ, Smit A, Zhang Z, Baertsch R, Hardison RC, Haussler D, Miller W. Human-mouse alignments with BLASTZ. Genome Res. 2003 Jan;13(1):103-7. PMID: 12529312; PMC: PMC430961