FIG. 2.

Growth of A. faecalis WM2072 mutants in 20 mM succinate-MOPS media with phosphate (A), phosphite (B), and hypophosphite (C) as the sole phosphorus sources. The cultures were grown at 37°C. Growth was monitored by measuring the optical density at 600 nm (OD₆₀₀) of the cultures. Control cultures containing no phosphorus source were monitored as well, and none of these cultures grew.