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The insulin-dependent diabetes (Idd) gene, Idd3, has been localised to a 0.35 cM region of chromosome 3 containing the structural gene for the cytokine interleukin 2 (IL-2). While variation of the N-terminal amino acid sequence of IL-2 has been shown to correlate with Idd3 allelic variation, differences in induction of proliferation by IL-2 allotypes have not been detected. In the current study, we examined the electrophoretic migration of IL-2 allotypes and have found two distinct patterns, consistent with differences in glycosylation, that correlate with diabetes-resistance and susceptibility. These findings strongly suggest that IL-2 variants may be functionally distinct.

Original publication




Journal article



Publication Date





477 - 482


Alleles, Amino Acid Sequence, Animals, Diabetes Mellitus, Type 1, Electrophoresis, Polyacrylamide Gel, Glycosylation, Interleukin-2, Mice, Mice, Inbred BALB C, Mice, Inbred C57BL, Mice, Inbred NOD, Molecular Sequence Data