Table 3. Gene transcripts whose expression (arithmetic) was significantly decreased when G. sulfurreducens was grown within a current-harvesting 10 mA potentiostat biofilm versus a fumarate control biofilm.

Locus ID	Common Name	Role Category/Main Role	Subrole	fold change
GSU2504	omcS, cytochrome c family protein	Energy metabolism	Electron transport	−4.53
GSU2780	hypothetical protein			−3.71
GSU2780b	hypothetical protein			−3.16
GSU1333	hypothetical protein			−2.90
GSU2751	dcuB, C4-dicarboxylate transporter, anaerobic	Transport and binding proteins	Carbohydrates, organic alcohols, and acids	−2.66
GSU1340	ABC transporter, permease protein	Transport and binding proteins	Unknown substrate	−2.17
GSU1330	metal ion efflux outer membrane protein family protein, putative	Cellular processes	Detoxification	−2.00
GSU2503	omcT, cytochrome c family protein	Energy metabolism	Electron transport	−1.96
GSU2750	conserved domain protein	Hypothetical protein	Domain	−1.68
GSU1330b	metal ion efflux outer membrane protein family protein, putative	Cellular processes	Detoxification	−1.63

Limma Analysis with a maximum p value of 0.001 was used for statistical analysis. Genes included has log2 ratios of greater than 1.