ce780dd2f1216ce728ab6bb69ac19a39ddc694fd
max
  Tue Sep 8 00:26:39 2026 -0700
hg38: Fiber-seq container with accessibility, FIRE peaks and CpG methylation, 41 samples

Native version of the Stergachis/Vollger lab hub at
https://fiberseq.github.io/UCSC-Fiber-seq-hub/hub.txt, plus the per-sample CpG
methylation Shane Neph asked to have alongside it. Both cover the same 41
samples: 14 cell lines and 27 lymphoblastoid lines from HPRC and GIAB
individuals.

fiberSeq              container, group regulation
fiberSeqAcc         multiWig overlay of 7 common cell lines, on by default
fiberSeqCompendium  faceted composite, dataTypes acc/peaks/hap
fiberSeqMeth        faceted composite, dataTypes comb/hap/diffs, "Methylation"

Both composites use the Methbase faceted-composite machinery. Subtracks are
named <composite>_<accession>_<dataType> with the accession as the only middle
component, because facetedCompositeUi() cuts the data element at the first
underscore and cartDump.c reassembles the name from the pieces; the hub's
<composite>_<sample>_<accession>_<type> names would have resolved to tracks that
do not exist. Sample name and cell type live in the metadata TSV instead. Using
dataTypes also brings onlyVisibility, which is what lets the peaks default to
dense while the signal tracks default to full, the mixed-visibility default
Andrew Stergachis asked for.

397 GB mirrored from the UW Kopah S3 server rather than pointed at over the
network, since a native track should not depend on it.

The FIRE peak bigBeds had to be rebuilt: they carry full narrowPeak data but
their header records a field count of 3, which hides signalValue and qValue
from the browser and would have made hgTracks errAbort in
bigNarrowPeakLoadItems(). The rebuild fixes the header and rounds the two float
columns to 3 decimals, 467 MB to 313 MB. It drops 421 of 9,487,043 peaks called
on chrEBV, the EBV decoy of the GRCh38 analysis set, which hg38 does not have;
9,486,622 remain and every sample reconciles exactly. Reported upstream, along
with GM12878's two haplotype accessibility bigWigs, which are one-base
placeholders at the source.

refs #36210

diff --git src/hg/makeDb/trackDb/human/hg38/trackDb.ra src/hg/makeDb/trackDb/human/hg38/trackDb.ra
index 00cb3a4c171..c8d03a44b7e 100644
--- src/hg/makeDb/trackDb/human/hg38/trackDb.ra
+++ src/hg/makeDb/trackDb/human/hg38/trackDb.ra
@@ -939,17 +939,19 @@
 include ancient.ra
 
 ### initial testing of HPRC chain tracks
 include hprcV2.trackDb.txt alpha
 
 include vgp577way.trackDb.ra alpha
 
 include crPred.ra alpha
 
 include tad.ra alpha
 
 track dnaMethylation override
 
 include methbase2.ra alpha
 
+include fiberSeq.ra alpha
+
 include imprinting.ra alpha
 # include hg38.GCF_040939455.1.chainNet.ra alpha