Good Morning Anamika:

Following the instructions for direct MySQL access:
http://genome.ucsc.edu/FAQ/FAQdownloads.html#download29

You can select the genes with single exons from the knownGene table:

$ mysql --user=genome --host=genome-mysql.cse.ucsc.edu -A \
-e "select chrom,txStart,txEnd,name from knownGene where exonCount=1;" hg19

You can perform the same selection with the table browser.
Use the "filter" to set exonCount is = 1
then "selected fields from primary and related tables"

There are 5,212 genes in hg19.knownGene that have single exons.

--Hiram

Anamika KRISHANPAL wrote:
> Hello,
> Is it possible to retrieve all the homo sapiens intronless genes (preferably 
> in bed format) from UCSC?
> Thanks.
> 
> Sincerely,
> Anamika
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