Hello,

 

I compared the mRNA sequence block for the TTN gene obtained from (1):
http://genome.ucsc.edu/cgi-bin/hgc?hgsid=147684681
<http://genome.ucsc.edu/cgi-bin/hgc?hgsid=147684681&g=htcCdnaAli&i=NM_133378
&c=chr2&l=179098963&r=179380395&o=179098963&aliTrack=refSeqAli&table=refGene
>
&g=htcCdnaAli&i=NM_133378&c=chr2&l=179098963&r=179380395&o=179098963&aliTrac
k=refSeqAli&table=refGene)

with the concatenation of exon coding sequences obtained from (2):
http://genome.ucsc.edu/cgi-bin/hgc?hgsid=147684681
<http://genome.ucsc.edu/cgi-bin/hgc?hgsid=147684681&g=htcGeneInGenome&i=NM_1
33378&c=chr2&l=179098963&r=179380395&o=refGene&table=refGene>
&g=htcGeneInGenome&i=NM_133378&c=chr2&l=179098963&r=179380395&o=refGene&tabl
e=refGene

and found many differences which, in part, appear to be the result of
including pieces of intronic sequence with exons in the latter step (2).  

 

I used the ATG in block two (from the mRNA block) and stripped off all
sequence before this start codon in both sequence sets before the
comparison. 

 

I wonder if the process that extracts the exons (step 2) might have a
problem with this large gene.

 

Regards,

 

Bill Dickinson

 

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