Hello Sir/Madam,

I have a doubt reagarding assembly conversion from hg18 and hg19.
The data set which i have is Hg 18, however in order to retrieve nformation
about alle frequencies and something more which is not there in hg 18 i
downloaded all hg19 files of SNP (CommonSNPtable using my java code -sql
connecter)

My doubt is wheni submitted the hg19 file of chrom,chromstart,chromend, i
recieve a file that is mapped to hg18, but some of them in hg19  are
deleted that is they might not have been there in hg18, its diffcult for me
to maunually check  which is deleted or which is not as sometimes there
might be 24 deletions for chrX alone , however I tried remapping this
result of hg18 back to hg19 thinking that i will know which hg19 chrom were
actually mapped but then again i recieve some deletiions , I mean when i
remap it back it must show all that hg19 which was mapped to hg18, then why
is there deletions again


Thank You,
MOnitha
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