The levels of this protein were also correlated with the effects of different growth conditions on iron uptake: protein abundance was maximal in cells grown in iron-deficient conditions, and zinc deficiency (more than copper) also increased Ot-Fea1 levels (and the level of iron associated with the Ot-Fea1 band on native gel), consistent with an effect of zinc on iron uptake (Fig. 5). The gene discussed is OXT; the disease is Zinc deficiency.