Before revision:  We confirm the over-representation of triangles in the PPI network and transitive triangles (feed-forward loop) in an E. coli regulatory network, but not in a yeast regulatory network.
After revision:  We confirm the over-representation of triangles in the PPI network , and confirm results from previous research as to over-representation of transitive triangles (feed-forward loop) in an E. coli regulatory network, but not in a yeast regulatory network.