Percentages of duplicated genes among different categories.

Percentages of duplicated genes among different categories. N is the number of triangles or triplets. Column “A” gives the percentage of genes with duplications in gene A (the shared subunit), while column “B or C” gives the percentage of duplications of the other two genes. For the closed triangles and other triplets (with no direct interactions), there is no central gene A and thus all 3 genes were counted as the same category.