Fig. 4From: Impairment of NADH dehydrogenase and regulation of anaerobic metabolism by the small RNA RyhB and NadE for improved biohydrogen production in Enterobacter aerogenes Comparison of pH of the medium over time for IAM1183 and its mutants during the 20-h batch cultivation. a The pH curves for IAM1183CD and IAM1183CD. b The pH curves for IAM1183/R, IAM1183-CD/R, and IAM1183-CDE/R. c The pH curves for IAM1183/N, IAM1183-CD/N, and IAM1183-CDE/NBack to article page