1. Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, B.C., Canada, V6T 1Z1
2. Department of Biochemistry
and Molecular Biology, University of British Columbia, Vancouver, B.C., Canada V6T 1Z3
3. Netherlands Centre for Biodiversity Naturalis, P.O. Box 9517, 2300 RA, Leiden, The Netherlands