In the original article, there was a mistake in the legend for Figure 1 as published. There were small discrepancies between the text of this legend and the drawing of the figure. The correct legend appears below.
Figure 1.
Biosynthesis routes of the quinones of Escherichia coli, starting from chorismate. Dashed arrows indicate enzymes deleted in mutants used in this study. The double arrow symbolizes the action of the introduced heterologous MenHBsu. The underlined intermediate C1-demethyl-C6-demethoxy-Q8 (DDMQ8) may accumulate in a ubiE mutant strain (for references: see text). Established bio-active quinones are indicated via their abbreviation. UQ, ubiquinone; DMK, demethylmenaquinone; MK, menaquinone; R, isoprenoid sidechain.
In the original article, there was a mistake in Figure 1 as published. In the chemical structure of two intermediates in the biosynthesis of menaquinone a key hydroxy group was missing. The corrected Figure 1 appears below.
The authors apologize for these errors and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.