1. National Center for Biotechnology Information, NLM, NIH, Bethesda, MD 20894, USA
2. Department of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
3. Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
4. Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA
5. Department of Biology, Johns Hopkins University, 3400 N. Charles Street—UTL 387, Baltimore, MD 21218, USA
6. Department of Molecular Biology & Genetics, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA