1. Department of Microbiology and Molecular Genetics, 2209 Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824–4320, USA
2. All-Russian Institute of Animal Genetics and Breeding, Russian Academy of Agricultural Science, Moskovskoye shosse 55A, St Petersburg – Pushkin 189620, Russia
3. Biological Research Institute, St Petersburg State University, Oranienbaumskoye shosse 2, St Petersburg – Stary Petergof 198504, Russia