Resource 149660

Name: Genotype data mapping

This file defines the order of the loci presented in per-chromosome downloadable genotype data. The file has integer 9 columns:

  1. Chromosome: 1-22, 23=X, 24=Y, 25=Mitochondrial;
  2. Order within chromosome: a zero-based index of position in the dataset;
  3. Affymetrix ID: the unique name Affymetrix uses for the locus;
  4. RS ID; the standard RS ID where available (0 otherwise);
  5. The type of locus - see below;
  6. The start position, in base-pairs;
  7. Sequence for Allele A;
  8. Sequence for Allele B;
  9. Which Allele is the Reference: either A, B or X (if neither).
Types of loci are: Hence the row
 1,6,14143477,12562034,2,768448,A,G,B 
means that in downloaded data for Chromosome 1, the 7th value corresponds to Affymetrix ID 14143477 which is also RS ID rs12562034, and is a True SNP wherein exactly one nucleotide on the flanking sequence is replaced with exactly one nucleotide on the subject sequence. The sequence begins at position 768448 and has allele variants "A" and "G", with the "G" variant being the reference.

The conversions offered by the gconv utility program require this file as an input.

This resource be downloaded or viewed using the link: genotype_map.csv