895644af226dd57285d4b0469da87dc34df76e5e
angie
  Thu Oct 24 13:55:25 2019 -0700
trackDb and descriptions for new tracks dbSnp152* and dbSnp153*.  tagTypes changes for bigDbSnp type (and subsequent big* types).  refs #23283

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+<h2>Description</h2>
+<p>
+This track shows hundreds of millions of short genetic variants
+(up to approximately 50 base pairs) from
+<A HREF="https://www.ncbi.nlm.nih.gov/SNP/" target=_blank>dbSNP</A>
+build 152:
+single-nucleotide variants (SNVs),
+small insertions, deletions, and complex deletion/insertions,
+relative to the reference genome assembly.
+Most variants in dbSNP are rare, not true polymorphisms,
+and some variants are known to be pathogenic.
+</p><p>
+For hg38 (GRCh38), approximately 655 million distinct variants
+(RefSNP clusters with rs# ids)
+have been mapped to almost 690 million genomic locations
+including alternate haplotype and fix patch sequences.
+dbSNP remapped variants from hg38 to hg19 (GRCh37);
+approximately 645 million distinct variants were mapped to
+over 670 million genomic locations
+including alternate haplotype and fix patch sequences (not
+all of which are included in UCSC's hg19).
+</p>
+<!--#insert file="dbSnp152.shared.html"-->