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Genetic complementation of the Synechococcus 7942ΔsqdX mutant. Lipid extracts from Synechococcus wild type (WT) and mutant strain 7942ΔsqdX carrying plasmids as indicated were separated by thin-layer chromatography. Lipids were visualized by exposure to iodine vapor. DGDG, diagalactosyldiacylglycerol; MGDG, monogalactosyldiacylglycerol; PG, phosphatidylglycerol; SQDG, sulfoquinovosyldiacylglycerol
