Fig. 7: The proportion of variance explained by additive and interaction effects between cis-regulatory variants and the expression of distal genes.

A given interaction explains on average a an additional 0.68% of the variation in the gene’s expression in the Lothian Birth Cohort, and b an additional 2.0% in the GEUVADIS dataset. c The total set of non-redundant interacting genes identified by stepwise regression explained 13.2% of the variation in gene expression in the Lothian Birth Cohort and 17.6% in the GEUVADIS dataset, with the interaction effects alone explaining 2 and 5% of the variation on average respectively (points are coloured by gene name).