Figure 1
From: An Exhaustive Epistatic SNP Association Analysis on Expanded Wellcome Trust Data

T1D epistatic interactions in the MHC region.
Each point corresponds to a significant, well separated, epistatic interaction in the extended MHC region. Positions of the two SNPs are shown on the x and y axes. Regions on the x-axis corresponding to MHC class I and class III are shaded. All positions shown on the y-axis fall in MHC class II region.