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Effects of light and temperature on motility. Cells of the parental strain ATCC 17978 and the ATCC 17978.OR blsA mutant harboring no additional plasmid or transformed with the blsA-complementing plasmid pWHBLSA (ATCC 17978.ORc) were inoculated on the surface of motility plates. Plates were inspected and photographed after incubation overnight (10 to 12 h) in darkness (D) or in the presence of blue light (L) at 24°C or 37°C.
