Genes of which the expression is positively correlated with PenG production. (A) Venn diagram of the genes comprising cluster 5 and of the genes of which the transcript level was reported to be specifically higher under PenG producing conditions (group 5 in Harris et al. ). (B) the 53 genes that are overlapping the two sets. The genes underlined contained at least one cis-regulatory motif, as indicated in (C), in their promoter sequences (promoter sequences includes the region -900, -1). (C) overrepresented cis-regulatory motif in the set of the 53 genes. The motif has been identified using the MEME software and the logo has been edited using the Weblogo software.