lnstitute of Enzymology, BRC, HAS, H-1113 Karolina út 29, Budapest, Hungary. aranyi@enzim.hu|lnstitute of Enzymology, BRC, HAS, H-1113 Karolina út 29, Budapest, Hungary. aranyi@enzim.hu|lnstitute of Enzymology, BRC, HAS, H-1113 Karolina út 29, Budapest, Hungary. aranyi@enzim.hu|lnstitute of Enzymology, BRC, HAS, H-1113 Karolina út 29, Budapest, Hungary. aranyi@enzim.hu