We are evaluating the liftOver tool for converting SNPs, that our researchers 
have found, from hg18 to hg19 (IOW, not ones that are in dbSNPs).  As a test I 
ran the hg18 dbSNPs 130 through liftOver, then compared the results to the hg19 
dbSNPs 130.

My results:
Starting: 18,833,531 
Converted by liftOver: 15,423,712  
Match Official position: 11,788,968
Failed to map: 3,409,819 
Mapped to "wrong" location: 3,634,744

1: Should my experiment have worked?  "Should" the liftOver tool have gotten 
all the SNPs to their official hg19 locations?
2: I'm not really worried about the SNPs that failed to map, but have ~20% of 
the SNPs map to the wrong location is kind of concerning.  What is your 
expected error rate?

Thank you,

Greg
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