Fig. 4From: Enhancing surfactin production by using systematic CRISPRi repression to screen amino acid biosynthesis genes in Bacillus subtilisEffect of inhibiting bkdAA and bkdAB on the composition of surfactin. Cn represents the carbon chain lengths of β-hydroxy fatty acids, where n is the number of carbon atoms. The amino acid sequence of the heptapeptide is Glu-Leu-Leu-Val-Asp-Leu-Leu, except for C14-2, which has the sequence Glu-Val-Leu–Leu-Asp-Leu-ValBack to article page