Direction of eQTL-gene pair effects. eQTL-gene pair effects are presented if the number of unidirectional or bidirectional associations for a given gene pair were ≥ 100. Genes are listed according their chromosome location. Bidirectional (left) or unidirectional (right) effects of eQTL-gene pairs are visualized by color. The effect information includes the number of eQTL-gene pairs (circles), the number of relevant tissues (squares) and the eQTLs distance (triangles).