DANUTA WOJCIESZYŃSKA, DOROTA DOMARADZKA, KATARZYNA HUPERT-KOCUREK and URSZULA GUZIK* Department of Biochemistry, Faculty of Biology and Environment Protection, University of Silesia in Katowice, Katowice, Poland *Corresponding author: U. Guzik, Department of Biochemistry, Faculty of Biology and Environment Protection, University of Silesia in Katowice, Katowice, Poland; e...