FIG 5.

Analysis of the extracellular medium from Synechocystis sp. PCC 6803 wild-type (wt) and kpsM mutant cultures. (A) Absorption spectra of concentrated medium, with arrows indicating the characteristic carotenoid peaks (at 460, 487, and 521 nm). (B) Synechocystis wild-type and kpsM mutant culture media exhibiting different orange color intensities due to the amounts of carotenoids. (C) Analysis of the lipopolysaccharides (LPS) in the extracellular culture medium of Synechocystis wild-type and kpsM mutant (mt) strains by SDS-polyacrylamide gel electrophoresis followed by staining with Pro-Q Emerald 300 lipopolysaccharide.