I am a professor at the Department of Physics of Stockholm University. My main research interest is in theoretical biochemistry, in particular reaction mechanisms of metalloenzymes. In our group we use the tools of theoretical chemistry, mainly the hybrid-DFT methods, to study the reaction mechanism of various metalloenzymes. The main emphasis is on the systems with red-ox active transition metals, which among others include photosystem II, cytochrome c oxidase, methane monooxygenase, ribonucleotide reductase, manganese catalase, nickel-iron hydrogenase, heme peroxidase, copper amine oxidase, isopenicillin n synthase, galactose oxidase, thermolysin and orotidine decarboxylase.