Institue of Enzymology, BRC, Hungarian Academy of Sciences, H-1113 Karolina út 29, Budapest, Hungary. tusi@enzim.hu|Institue of Enzymology, BRC, Hungarian Academy of Sciences, H-1113 Karolina út 29, Budapest, Hungary. tusi@enzim.hu|Institue of Enzymology, BRC, Hungarian Academy of Sciences, H-1113 Karolina út 29, Budapest, Hungary. tusi@enzim.hu|Institue of Enzymology, BRC, Hungarian Academy of Sciences, H-1113 Karolina út 29, Budapest, Hungary. tusi@enzim.hu|Institue of Enzymology, BRC, Hungarian Academy of Sciences, H-1113 Karolina út 29, Budapest, Hungary. tusi@enzim.hu