The authors have measured the electrical resistivity, rho , and the thermopower, S, for the liquid alloy MgZn across the entire concentration range. New data for rho and S for pure liquid Zn are also reported. Data for the liquid alloy are shown to be consistent with the Faber-Ziman theory, provided the pseudopotential for Zn is assumed to be energy dependent. A comparison of the data for the liquid alloy with data previously reported for the solid amorphous alloy indicate that this energy dependence should also be considered in the solid.