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Production Assistant, Diabetes In Control

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International Textbook of Diabetes Mellitus, 4th Ed., Excerpt #168: Molecular Genetics of Type 1 Diabetes Part 5

Linkage studies identify regions of the genome that are shared more frequently than would be expected by chance by relatives affected by a particular disease. Most studies analyze affected sibling pairs and utilize genetic markers that are scattered throughout the genome at moderate density, typically microsatellites. A significant excess of allele sharing identical by-descent (IBD) in affected sibpairs suggests that the region containing the marker locus also contains a disease susceptibility locus. The first linkage scan for T1DM identified 20 chromosomal regions with suggestive evidence of linkage to disease, including the HLA and INS gene regions.

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