1. Department of Biology, Westminster College1840 South 1300 East, Salt Lake City, UT 84105, USA
2. Department of Biology, Fort Lewis College Durango, CO 81301, USA
3. Department of Biology, University of UtahSalt Lake City, UT 84105, USA
4. Department of Microbiology, University of NevadaReno, NV 89557,USA