作者单位:The Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA[1]Department of Biological Chemistry, Rothamsted Research, Harpenden, Herts, United Kingdom[2]Structural and Genomics Information Laboratory, CNRS-UPR2589, Mediterranean Institute of Microbiology (IFR-88), Aix-Marseille University, Marseille, France[3]Plymouth Marine Laboratory, Plymouth, United Kingdom[4]