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Table 3 Nutrient uptake and metabolite excretion in PMS medium (pyruvate as the sole carbon source) during various growth conditions.

From: Energy metabolism of Heliobacterium modesticaldum during phototrophic and chemotrophic growth

Growth condition Nitrogen source Pyruvate supplied/consumed (mM) Acetate excretion (mM) Ratio of pyruvate consumption/acetate excretion Lactate excretion (mM)
phototrophic growth NH4+ 20 7.8 39% --
phototrophic growth + 0.4% bicarbonate NH4+ 20 7.0 35% --
phototrophic growth 98% N2/
2% H2
20 7.2 36% --
chemotrophic growth NH4+ 40 17.5 44% --
chemotrophic growth 98% N2/
2% H2
40 16.8 42% --