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# Different annotations for same co-ordinates in vcf

Member Posts: 48
edited January 2013

Please look at lines 1 and 2 taken from a vcf file, which have same Chromosome and Position and one of the Alt allele is same in both lines, different allele count and have different rsID.

Post edited by Geraldine_VdAuwera on
Tagged:

• Member, Dev Posts: 544 ✭✭✭✭

The annotations are correct, rs70949568 is the insertion in Line 1: http://www.ncbi.nlm.nih.gov/projects/SNP/snp_ref.cgi?rs=70949568

• Member Posts: 48

Thanks.

But my doubt is according to the lines mentioned, for rs70949568 there are 2 Alternate Alleles (ACGCCCCTGCCCTGGAGGCCCCGCCCCTGCCCTGGAGGCCC and C). The Alternate Allele 'C' for rs70949568 fmeans that it is a SNP which changes from Ref Allele 'A' to 'C'

Now for the second line which is the same Chr and Pos repeated again in the same vcf, the Alternate Allele is again C, which was mentioned as one of the Ref allele for rs70949568 and both lines have same Ref Allele.

So my doubt is why should we have same change A to C mentioned in 2 lines.