99db113e49bd1dd42a3040eaed1e61188a117ecf
max
  Wed May 13 05:44:18 2026 -0700
mucins: new locus-specific mucin VNTR/non-VNTR exon track on hs1 (alpha)

Adds a new 'Locus-specific' container in the genes group with two
bigGenePred subtracks (mucinsVntr, mucinsNonVntr) derived from
Plender et al. 2024 supplementary table 2. The .ra and HTML files live
under trackDb/human/ so future locus-specific tracks can share them;
hs1 picks them up via include ../mucins.ra alpha.

refs #37540

diff --git src/hg/makeDb/trackDb/human/mucins.ra src/hg/makeDb/trackDb/human/mucins.ra
new file mode 100644
index 00000000000..1cc748bd2ad
--- /dev/null
+++ src/hg/makeDb/trackDb/human/mucins.ra
@@ -0,0 +1,34 @@
+track locusSpec
+superTrack on
+shortLabel Locus-specific
+longLabel Locus-specific annotations
+group genes
+visibility hide
+
+    track mucinsNonVntr
+    parent locusSpec
+    shortLabel Mucin non-VNTR exons
+    longLabel Mucin gene non-VNTR exons (Plender et al. 2024 supplementary data)
+    type bigGenePred
+    bigDataUrl /gbdb/$D/locusSpec/mucins/mucinsNonVntr.bb
+    itemRgb on
+    visibility pack
+    searchIndex name,name2,geneName
+    labelFields name,name2,geneName,geneName2
+    defaultLabelFields name
+    mouseOver <b>$name2 $name</b><br>transcript: $geneName<br>type: $type<br>length: ${chromEnd}-${chromStart}
+    priority 2
+
+    track mucinsVntr
+    parent locusSpec
+    shortLabel Mucin VNTR exons
+    longLabel Mucin gene VNTR exons (Plender et al. 2024 supplementary data)
+    type bigGenePred
+    bigDataUrl /gbdb/$D/locusSpec/mucins/mucinsVntr.bb
+    itemRgb on
+    visibility pack
+    searchIndex name,name2,geneName
+    labelFields name,name2,geneName,geneName2
+    defaultLabelFields name
+    mouseOver <b>$name2 $name</b><br>transcript: $geneName<br>type: $type<br>length: ${chromEnd}-${chromStart}
+    priority 1