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Plate phenotypes of P. aeruginosa strains carrying wild-type or mutant kinB alleles. FRD1, wild type; FRD840, ΔalgB::ΩaacC1; FRD1049, kinB::Tn501; and FRD440, algT::Tn501 on L agar. Numbers are levels (in micrograms per milliliter) of alginate produced as determined by the carbazole assay (19, 26). Note that a kinB null mutation (FRD1049) did not affect alginate production.
