From: Revisiting operons: an analysis of the landscape of transcriptional units in E. coli
Palsson
RegulonDB
Category
D (573)
E (335)
F (821)
E (433)
E (359)
F (765)
Genes
271 (47%)
46 (14%)
102 (12%)
229 (59%)
70 (19%)
65 (8%)