Laboratory of Theoretical Genetics, Institute of Cytology and Genetics, 10 Lavrentyev Ave., Novosibirsk 630090, Russia. ada.bionet.nsc.ru|Laboratory of Theoretical Genetics, Institute of Cytology and Genetics, 10 Lavrentyev Ave., Novosibirsk 630090, Russia. ada.bionet.nsc.ru|Laboratory of Theoretical Genetics, Institute of Cytology and Genetics, 10 Lavrentyev Ave., Novosibirsk 630090, Russia. ada.bionet.nsc.ru