[Genome] unknown bases

[Hiram Clawson]

Good Morning Maria:

You can read about the fasta sequences in the FAQ:
	http://genome.ucsc.edu/FAQ/FAQdownloads#download1
	http://genome.ucsc.edu/FAQ/FAQdownloads#download5
	http://genome.ucsc.edu/FAQ/FAQdownloads#download9
	http://genome.ucsc.edu/FAQ/FAQdownloads#download16

Repeats are masked by lower case letters.  Unknown sequence
is marked at N.

--Hiram

Maria Astrom wrote:
> Hi !
> I am student of bioinformatics, much new to the field. I want to download the masked chromosome- wise sequence of first chromosome from hg18 release. I want to know how the unknown bases are noted in sequences. Since masked repeats are marked by Ns. Secondly, how can i get information about the position of unknown bases ?
> 
> Thanks
> M
> 
>  
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