Genetic engineering of the precursor supply pathway for the overproduction of the nC14-surfactin isoform with promising MEOR applications

Table 3 Likely identity and structural formula deduced for each peak

Number	m/z	Molecular formula	Speculated structure
1	980.63	([C₄₉H₈₅N₇O₁₃] + H)⁺	C₁₂[Leu/Ile², Val⁴, Val⁷] or C₁₃[Val², Val⁴, Val⁷]
2	994.64	([C₅₀H₈₇N₇O₁₃] + H)⁺	C₁₃[Leu/Ile², Val⁴, Val⁷] or C₁₂[Leu/Ile², Val⁴, Leu/Ile⁷]
3	1008.66	([C₅₁H₈₉N₇O₁₃] + H)⁺	C₁₃[Leu/Ile ², Val⁴, Leu/Ile ⁷]
4	994.64	([C₅₀H₈₇N₇O₁₃] + H)⁺	C₁₃[Leu/Ile ², Val⁴, Val⁷]
5	1022.67	([C₅₂H₉₁N₇O₁₃] + H)⁺	C₁₄[Leu/Ile ², Val⁴, Val⁷]
6	1022.67	([C₅₂H₉₁N₇O₁₃] + H)⁺	C₁₄[Leu/Ile ², Val⁴, Val⁷]
7	1036.69	([C₅₃H₉₃N₇O₁₃] + H)⁺	C₁₅[Leu/Ile ², Val⁴, Leu/Ile ⁷]
8	1036.69	([C₅₃H₉₃N₇O₁₃] + H)⁺	C₁₅[Leu/Ile ², Val⁴, Leu/Ile ⁷]
9	1050.70	([C₅₄H₉₅N₇O₁₃] + H)⁺	C₁₅[Leu/Ile ², Leu/Ile ⁴, Leu/Ile ⁷]

ISSN: 1475-2859