Fig. 4From: Improved biosynthesis of heme in Bacillus subtilis through metabolic engineering assisted fed-batch fermentationRelative transcriptional levels and heme production of the recombinant strains constructed by engineering the urogen III synthesis pathway. (A) Relative transcriptional levels of genes hemD, hemH, and hemQ in the recombinant strain BSH7, relative to that in BSH6, defined as 1. (B) Heme production of BSH6 and BSH7 after 36 h of fermentationBack to article page