Fig. 3From: Heme biosensor-guided in vivo pathway optimization and directed evolution for efficient biosynthesis of hemea: PPIX production and RBS distribution in the screened strains; b: porphyrin accumulation during PPIX production; c: PPIX production of strain No. 20 using glucose as the carbon source; d: PPIX production of strain No. 20 using glucose as the carbon source after optimization of fermentation conditionsBack to article page