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Keywords:

  • type 1 diabetes mellitus;
  • genetics;
  • major histocompatibility complex (MHC);
  • susceptibility gene;
  • NOD mouse;
  • Idd16

Major histocompatibility complex (MHC)-linked susceptibility to type 1 diabetes consists of multiple components. Previous studies with NOD mice congenic for the MHC from a sister strain, the CTS mouse, mapped Idd16, a second component of MHC-linked susceptibility to type 1 diabetes, in the region adjacent to, but distinct from Idd1 in the class II region. In this study, three lines of subcongenic strains were established from the original congenic strain. Phenotypic analysis of the strains indicated that MHC-linked susceptibility to type 1 diabetes consists of at least three components: Idd1, Idd16.2 adjacent to Idd1, and Idd16.1 telomeric to Idd16.2.