Figure 6.

Influence of mineral ions on the proteolytic activity (pro) (U/ml) of Y. lipolytica. H₃BO₃(h3); CuSO₄.5H₂O (cu); KI(k); MnSO₄.2H₂O (mn); FeSO₄.7H₂O (fe); Na₂MoO₄.2H₂O (na); CoCl₂.6H₂O (co) and ZnCl₂ (zn) were added at different combination to the colorimetric reaction for proteolysis activity determination using azocasein as substrate. (a) absence, (p) presence. Results are mean values of two independent repeat of 67 experiments. *indicates trace-elements and interactions that have an inhibitory effect on the proteolytic activity of Y. lipolytica