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Comparison of hydrocarbon extracts from the wild-type and mutant strains of PCC 7002. GC-MS signal was normalized to the height of an internal standard peak (hexadecane, 8.3 min). Two hydrocarbons, 1,14-nonadecadiene and 1-nonadecene, were identified in extracts of the wild type and the promoter replacement Φ(PpsbA-ols) mutant but not in extracts of the Δols mutant.
