Table 4. Operons associated with a FNR ChIP-seq peak and lacking a FNR-dependent change in expression in GMM but are repressed by Fur (Category 4).

Peak Center (nt)a	First Gene of Operon Downstreamb	B-number of First Genec	Cellular Functiond	Referencee
611865	fes	b0585	Enterochelin Esterase	[151], [152]
621417	fepD/entS	b0590/b0591	Ferric Enterobactin Transporter (fepD)/Enterobactin Efflux Transporter (entS)	[152]–[154]
623975	fepB/entC	b0592/b0593	Ferric Enterobactin Transporter (fepB)/Isochorismate Synthase (entC)	[152], [155], [156]
1298775	oppA	b1243	Oligopeptide Transporter	[152]
1308975	tonB	b1252	Iron-Siderophore Transport	[152], [157]
1634625	nohA	b1548	Predicted Packaging Protein (Qin Prophage)	[152], [158]
1735575	purR	b1658	Hypoxanthine Transcriptional Repressor	[159], [160]
3150150	exbB	b3006	Iron-Siderophore Transport	[152]
3273150	garP	b3127	Galactarate/Glucarate/Glycerate Transporter	[152], [160]
3538050	feoA	b3408	Ferrous Iron Transport	[59]

^aGenomic location within each FNR ChIP-seq peak with the highest read count (the summit of the peak).

^bFirst gene of the operon downstream of the FNR ChIP-seq peak, and operon designation was obtained from EcoCyc [70]. For peaks located within divergent promoters with both operons repressed by Fur, both genes are identified, separated by “/”.

^cIdentification number (B-number) for the first gene in each operon, obtained from EcoCyc [70]. For peaks located within divergent promoters with both operons repressed by Fur, both B-numbers are identified, separated by “/”.

^dFunctional description of the products of the operons, obtained from EcoCyc [70]. For peaks located within divergent promoters with operons repressed by Fur, the functions of both operons are listed, separated by “/”.

^eReference for Fur repression of each operon.