Table 1.

Characteristics of the a priori graphs and LOMBARDE output networks

Network	Explained		No. of	No. of	No. of
	co-expressions		vertices	arcs	arcs in $\mathcal{V}$
TRN ${\mathcal{G}}_{\mathcal{V}}$ built from $\mathcal{V}$	3,990	(6.5 %)	823	1,652	1,652
E. coli ab initio ${\mathcal{G}}_{\mathcal{A}}$	56,044	(91.1 %)	2,390	25,604	444
Lombarde output for ${\mathcal{G}}_{\mathcal{A}}$	56,044	(91.1 %)	2,336	4,922	295
E. coli extended${\mathcal{G}}_{\mathcal{A}\mathcal{V}}$	56,789	(92.3 %)	2,434	26,812	1,652
Lombarde output for ${\mathcal{G}}_{\mathcal{A}\mathcal{V}}$	56,789	(92.3 %)	2,370	4,374	1,520

The a priori graphs explained most of the co-expressions. The LOMBARDE results kept most of the vertices, significantly reduced the number of arcs, and kept most of the validated arcs