1. Polymer Chemistry Department, Chemical Faculty, Moscow State University, Leninskiye gory, V-234 Moscow 119992, Russia; Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00, Lund, Sweden; and Department of Pure and Applied Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00, Lund, Sweden