FIG. 3.

Typical time courses of sheath degradation by and growth of strain TB. Strain TB was statically cultured at 30°C in a series of 500-ml flasks containing 100 ml of a medium composed of sheath (0.01%), peptone (0.2%), and K₂HPO₄ (0.1%). At intervals of 24 h, one flask was taken out and utilized for determinations of sheath and cells. Symbols: ■, amount of sheath; ●, cell concentration.