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Allele Definitions Between Dbsnp And Illumina

Hi,
I am comparing SNP data between data obtained from the Illumina HumanOmni5 and dbSNP. I noticed that the alleles dont always agree. There are quite a few SNPs where e.g.:
dbSNP alleles C/T
Illumnia alleles G/A
Does anybody have an idea where this discordance may stem from?

Thanks

illumina genotype dbsnp

1 answer

You might find this link to be helpful:

http://www.openbioinformatics.org/gengen/tutorial_allele_coding.html#dbsnp

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