Files in this Data Supplement:

• Supplemental file 1 - Supplemental information for Materials and Methods, list of enzymes used in the analysis (Table S1), taxonomical data of the sequences retrieved from the INSD Web search (Table S2), compositions of some alternative enzyme sets to be used for TRFLPs (Table S3), D₀ results from using these alternative sets to analyze the databases used in this study (Table S4), and graphical output of the hierarchical clustering of the TRFLP data from individual enzymes (Fig. S1).
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