Fig. 3From: Enhanced lincomycin A production by calcium gluconate feeding in fermentation of Streptomyces lincolnensisTime course changes of glucose (Glc) consumption rate (a), calcium gluconate concentration (b), intracellular Glc concentration (c), and extracellular ammonium ion concentration (d). Black: mode 8. Red: control. Each point represents the mean (n = 3) ± standard deviationBack to article page