Dear Genome Assemblers,

I didn't find the first chromosome sequence in drosophila (dm3) 
chromFaMasked.tar.gz file as shown below.
In addition, what do 'LHet' and '2L' mean in files of chr2LHet.fa.masked and 
chr2L.fa.masked ?
Another question, the RefGene file of rat (rn4) misses the first column as 
compared to hu19.refGene, would you explain you have changed the format or it's 
due to something else?  You reply will be greatly appreciated !

tar xvf chromFaMasked.tar.gz

-rw-rw-r--  1 wangd3 bioinfo7  23471782 Jun 21  2007 chr2L.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7    376260 Jun 21  2007 chr2LHet.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7  21569650 Jun 21  2007 chr2R.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7   3354547 Jun 21  2007 chr2RHet.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7  25034436 Jun 21  2007 chr3L.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7   2606611 Jun 21  2007 chr3LHet.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7  28463162 Jun 21  2007 chr3R.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7   2567868 Jun 21  2007 chr3RHet.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7   1378901 Jun 21  2007 chr4.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7     19914 Jun 21  2007 chrM.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7  29584761 Jun 21  2007 chrUextra.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7  10250024 Jun 21  2007 chrU.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7  22871290 Jun 21  2007 chrX.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7    208204 Jun 21  2007 chrXHet.fa.masked
-rw-rw-r--  1 wangd3 bioinfo7    353988 Jun 21  2007 chrYHet.fa.masked


Thanks,

Daqing (Derek) Wang, PhD
Staff Scientist - Bioinformatics

Life Technologies, Inc.
(Applied Biosystems)
Building 800
Foster City, CA 94404

Office: (650) 638-5102
E-mail: [email protected]
http://www.lifetechnologies.com/

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