FIG 10.

Yeast extract and vitamins promote the growth of oxygen-sensitive mutants. Shown are the turbidities of cultures grown in a minimal aerobic medium (ZYMM) with the indicated supplement after gentle vortexing (5 s, level 3) (filled bars) and after the dispersion of flocs by harsh vortexing (10 pulses, level 10) (open bars). Cultures were inoculated from colonies (A) or from harshly vortexed cultures from panel A (B and C). Shaded circles indicate the same culture pre- and postdispersion. Y, visual observation of flocs; N, no flocs observed.