4d62fae590223b48c28c0212f3422176cd80e2f7
brianlee
  Wed Feb 17 10:22:44 2021 -0800
Adding a note about the input referenceDb that came up in bigMaf MLQ refs #27009

diff --git src/hg/htdocs/goldenPath/help/bigMaf.html src/hg/htdocs/goldenPath/help/bigMaf.html
index c084221..f4c3bd0 100755
--- src/hg/htdocs/goldenPath/help/bigMaf.html
+++ src/hg/htdocs/goldenPath/help/bigMaf.html
@@ -82,30 +82,33 @@
 <a href="http://hgdownload.soe.ucsc.edu/admin/exe/">directory</a>.</p> 
 <p>
 <strong>Step 5.</strong> 
 Use the <code>fetchChromSizes</code> script from the 
 <a href="http://hgdownload.soe.ucsc.edu/admin/exe/">same directory</a> to create a 
 <em>chrom.sizes</em> file for the UCSC database with which you are working (e.g., hg38). 
 Alternatively, you can download the 
 <em>chrom.sizes</em> file for any assembly hosted at UCSC from our 
 <a href="http://hgdownload.soe.ucsc.edu/downloads.html">downloads</a> page (click on &quot;Full 
 data set&quot; for any assembly). For example, the <em>hg38.chrom.sizes</em> file for the hg38 
 database is located at 
 <a href="http://hgdownload.soe.ucsc.edu/goldenPath/hg38/bigZips/hg38.chrom.sizes" 
 target="_blank">http://hgdownload.soe.ucsc.edu/goldenPath/hg38/bigZips/hg38.chrom.sizes</a>.</p>
 <pre><code>mafToBigMaf hg38 chr22_KI270731v1_random.maf stdout | sort -k1,1 -k2,2n > bigMaf.txt
 bedToBigBed -type=bed3+1 -as=bigMaf.as -tab bigMaf.txt hg38.chrom.sizes bigMaf.bb </code></pre>
+<p>Note that the hg38 in the mafToBigMaf hg38 command indicates the referenceDb and matches the
+expected prefix of the primary species' sequence name, for instance hg38 for the
+hg38.chr22_KI270731v1_random found in the input example chr22_KI270731v1_random.maf file.</p>
 <p>
 <strong>Step 6.</strong> 
 Follow the below steps to create the binary indexed mafFrames and mafSummary files to accompany 
 your bigMaf file:</p> 
 <pre><code>genePredSingleCover chr22_KI270731v1_random.gp single.gp
 genePredToMafFrames hg38 chr22_KI270731v1_random.maf bigMafFrames.txt hg38 single.gp
 bedToBigBed -type=bed3+8 -as=mafFrames.as -tab bigMafFrames.txt hg38.chrom.sizes bigMafFrames.bb
 
 hgLoadMafSummary -minSeqSize=1 -test hg38 bigMafSummary chr22_KI270731v1_random.maf
 cut -f2- bigMafSummary.tab | sort -k1,1 -k2,2n &gt; bigMafSummary.bed
 bedToBigBed -type=bed3+4 -as=mafSummary.as -tab bigMafSummary.bed hg38.chrom.sizes bigMafSummary.bb </code></pre>
 <p>
 <strong>Step 7.</strong> 
 Move the newly created bigMaf file (<em>bigMaf.bb</em>) to a web-accessible http, https or ftp 
 location. If you generated the <em>bigMafSummary.bb</em> and/or <em>bigMafFrames.bb</em> files,