<p>Experimental investigation focused on influence of different CoFeO4 nanoparticles concentrations on soluble<br />protein and electrophoretic pattern of Phanerochaete chrysosporium fungus. Number of electrophoretic fraction is higher<br />in older mycelium P. chrysosporium 14-day-old compared to that 7-day-old. Moreover, there is an increase in staining<br />intensity of polypeptides of mycelium 14-day-old fact confirmed also by the higher amount of soluble protein. On the other<br />hand, there are no visible differences as regards the different concentrations of nanoparticles effect on the polypeptides<br />pattern.</p>