Preservation statistics of R. capsulatus modules in R. sphaeroides data. The size of the bubble represents module size in the data subset used to assess module preservation. The horizontal lines indicate the Zsummary.pres thresholds for strong evidence of conservation (above 10) and for low to moderate evidence of conservation (above 2). R. capsulatus modules found to be conserved in R. sphaeroides are listed on the right side. (a) Module preservation as a function of module quality; (b) relationship between the two preservation statistics (Zsummary.pres and medianRank). Lower medianRank indicates higher preservation.