TABLE 2.

Complexation of Cu in solutions containing 0.125 mM added Cu^a

Culture medium	Measured Cu (M)	Predicted Cu (M)	Predicted complexation states
MSVP	4.61 × 10−7	2.25 × 10−6	CuSO4, CuHPO4, Cu-pyru- vate−, Cu-(pyruvate)2
MOPSO	6 × 10−6	1.3 × 10−6	CuCl−, CuOH, CuOH2−,(s)

^aFree Cu concentrations were measured with a cupric electrode. Predicted concentrations of Cu were determined by using the speciation program Mineql.