Hi - the altPromoter extends from 100 bases before to 50 bases after  
the transcription start site.

On Mar 29, 2010, at 9:09 PM, Jing Zhang wrote:

> Hello,
>
> This is Jing from USC Computational Molecular Biology department.  
> Recently I
> have been using the UCSC altEvent information for human and it is  
> quite
> helpful. However, I have some confusion about the altPromoter event.  
> For the
> altFivePrime events, the start and end positions means two possible  
> five
> prime side. Then how about the altPromoter start and end points? Are  
> they
> two possible positions or the starting and ending points of one  
> region?
> Besides, it is very interesting that the difference of the starting  
> and
> ending positions of each altPromoter line are all 150. Why it is  
> like this?
>
> I tried to read the description of the data and searched for some
> presentations of it, but still can not understand the altPromoter  
> lines.
> Would you please provide me some information about these problems?  
> Many
> thanks in advance.
>
> Best,
> -- 
> Jing
>
> -----------------------------------------------------------
> Electrical Engineering & Computational Molecular Biology
> University of Southern California
> Office: MCB 416D, (213) 821-4003,
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