Hi Andrea,

We only display RefSeq genes that make it through our alignment process. 
More information about our alignment process can be found on the RefSeq 
description page here: 
http://genome.ucsc.edu/cgi-bin/hgTrackUi?db=danRer7&g=refGene. 
<http://genome.ucsc.edu/cgi-bin/hgTrackUi?db=hg18&g=refGene.> I hope 
this information is helpful. Please feel free to contact the mail list 
again if you require further assistance.
---
Luvina Guruvadoo
UCSC Genome Bioinformatics Group


On 6/8/2012 9:55 AM, Dr. Andrea Sboner wrote:
> Hello,
>
> I noticed that the number of RefSeq genes for Zebrafish -- Jul. 2010
> (Zv9/danRer7) is currently 15,803, from the refGene table.
> RefSeq Genes (refGene) Summary Statistics
>
>       
> item count    15,803
> item bases    391,968,562 (27.80%)
> item total    425,791,569 (30.20%)
> smallest item         60
> average item  26,944
> biggest item  2,381,874
> block count   138,070
> block bases   28,912,124 (2.05%)
> block total   29,774,076 (2.11%)
> smallest block        1
> average block         216
> biggest block         8,378
>
>
> This is quite in contrast with the numbers listed in Ensembl (~32K) and
> NCBI/Gene (~34K
> http://www.ncbi.nlm.nih.gov/sites/entrez?db=gene&cmd=search&term=alive%5Bprop%5D%20NOT%20newentry%5Btitle%5D%20AND%20txid7955).
>
>
> I am wondering whether you could explain this difference.
>
> Thank you very much.
>
> Best regards,
> Andrea Sboner
>

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