A.A. Ivantsova - Laboratory Assistant, Department of Biochemistry, Federal State Budgetary Scientific Institution «Institute of Experimental Medicine», Saint-Petersburg, Russia. E-mail: anna.ivantcova@gmail.com I.V. Belik - Laboratory Assistant, Department of Biochemistry, Federal State Budgetary Scientific Institution «Institute of Experimental Medicine», Saint-Petersburg, Russia. E-mail: ivanbelik2014@ya.ru