Hey,

I see that the level for a chain in the netPanTro2 is different between the
genome browser and the table.
I am looking at the following region in hg18, chr1:465-19,890.
http://genome.ucsc.edu/cgi-bin/hgTracks?db=hg18&position=chr1:465-19,890

The alignment displayed with "netPanTro2" - "full" has gaps at level 1 which
are present in the table with a different level.

Like this,
Level: 1
Human position: chr1:10312-11327
http://genome.ucsc.edu/cgi-bin/hgc?hgsid=162777095&o=10311&t=11327&g=netPanTro2&i=2

But the same gap in the table hg18.netPanTro2 has level 2.

#bin    level   tName   tStart  tEnd    type    human_size   chimp_size
585     1       chr1    464     19890   top     19426   19150
585     2       chr1    631     641     gap     10      0
585     2       chr1    663     685     gap     22      0
585     2       chr1    691     709     gap     18      0
585     2       chr1    759     780     gap     21      0
585     2       chr1    1249    1311    gap     62      0
585     3       chr1    1249    1311    nonSyn  62      62
585     2       chr1    10311   11327   gap     1016    0
585     3       chr1    10311   11327   nonSyn  1016    1723
585     4       chr1    10681   10997   gap     316     1023
585     5       chr1    10770   10969   nonSyn  199     219

Similarly the non-Syn region
*Type:* nonSyn
*Level:* 3
*Human position:* chr1:10771-10969
*Chimp position:* chr12:57677594-57677812
But this record has level 5 in the table. Am I missing something here?

My second question is, what do gaps of different length mean? I see in the
table for the same region there is a gap with human_size=316 and
chimp_size=1023 (level 4 in table and level 2 in browser). Are these
basically gaps between best matching chains?

Thanks,
Vishal
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