Figure 4. The same function can be realized by many distinct circuit motifs.

The distribution of the proportion of all possible circuit motifs per k-function is shown for all (A) monofunctions, (B) bifunctions, and (C) trifunctions. Bar heights are therefore normalized by (A) 64, (B) 1204, and (C) 7616, the number of possible monofunctions, bifunctions, and trifunctions, respectively³¹.