In addition, overexpression of IRF1 was also able to induce hyphal growth in the mutants under both growth conditions (Figure 6C), suggesting that Ahr1 and Tec1 are dispensable for the hyphal program induced by iron deficiency and are also not required for the hyphal programme induced by Irf1, thereby indicating that both programmes are similar. This evidence concerns the gene IRF1 and hyperinsulinemic hypoglycemia, familial, 4.