NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
SNP FAQ Archive [Internet]. Bethesda (MD): National Center for Biotechnology Information (US); 2005-.
This publication is provided for historical reference only and the information may be out of date.
Your descriptions of mapweight in the FTP README for Chromosome Reports and for SNPMapInfo in the data dictionary are contradictory. Which is correct?
The definitions of map weight for chromosome reports and database tables are indeed different:
Chromosome Reports Database Tables Mapweight 1 = Unmapped Mapweight 1 = SNP aligns exactly at one locus Mapweight 2 = Mapped to single position in genome Mapweight 2 = SNP aligns at two locus on same chromosome Mapweight 3 = Mapped to 2 positions on a single chromosome Mapweight 3 = SNP aligns at less than 10 locus Mapweight 4 = Mapped to 3-10 positions in genome (possible paralog hits) Mapweight 5 = Mapped to >10 positions in genome Mapweight 10= SNP aligns at more than 10 locations The mapweight definitions for the database are different for historical reasons, so both definition series are correct: The mapweights defined in the chromosome reports section of the FTP README are true for chromosome reports, and the definitions given for the database tables in the database dictionary are true for all FTP data table files. (07/14/08)
- Discrepancies between FTP Documentation and Data Dictionary - SNP FAQ ArchiveDiscrepancies between FTP Documentation and Data Dictionary - SNP FAQ Archive
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