Fig 3.

Phenotypes of regulatory mutants. (A) Halobacterium sp. NRC-1 bat wild-type (bat⁺) and bat deletion mutant (Δbat) strains are shown on an agar plate. A subtle phenotypic difference is visible, with the wild-type bat strain appearing purple (left) and the bat mutant strain (right) appearing pink. (B) Halobacterium sp. NRC-1 wild-type bat (left) and bat mutant (right) red membrane (RM) and purple membrane (PM) fractionated by sucrose gradient. (C) Growth of Halobacterium sp. NRC-1 wild-type dmsR and ΔdmsR strains in anaerobic liquid cultures shown by plotting optical density (at 600 nm) versus time (in days). Shown are growth curves (average of 3 cultures) for the wild-type dmsR strain in medium with TMAO (blue) or without TMAO (yellow) and the ΔdmsR strain with TMAO (pink).