Genetic regulation of phosphate transport system II in Neurospora

Phosphate transport system II, previously shown to be responsible for high-affinity phosphate uptake under conditions of phosphorus starvation, is regulated by at least three genes: pcon-nuc-2, preg, and nuc-1. nuc-1 and nuc-2 mutants cannot be derepressed for phosphate transport system II, while pconc and pregc mutants are partially constitutive.