Table 1. Minimal medium composition.

(NH4)2SO4	6.86 g l−1
KH2PO4	1.56 g l−1
Na2HPO4	5.16 g l−1
Ammonium citrate	0.49 g l−1
MgSO4	0.3 g l−1
Metal salts solution†	1 ml l−1

^†0.5 g l⁻¹ CaCl₂, 0.18 g l⁻¹ FeCl₃, 0.18 g l⁻¹ ZnSO₄, 0.16 g l⁻¹ CuSO₄, 0.15 g l⁻¹ MnSO₄, 0.18 g l⁻¹ CoCl₂, 20.1 g l⁻¹ EDTA.