Fig 4. Production of staphyloxanthin in the wild-type S. aureus strain SH1000 and its derivative msr mutants.

-The bottom panel shows the color of the bacterial cell pellet from 50 ml overnight grown cultures. The amount of the staphyloxanthin pigment produced by these cells was quantified and is shown as A₄₆₂. Values indicate the average of three independent experiments ± standard deviation (* significant at p≤.05).