Fig. 2

Taxonomic assignment of synthetic reads. a Comparison of numbers of family, genus and species level assignments relative to missing assignments at same levels between HITdb and Greengenes databases. Taxonomy from Greengenes has been assigned with both RDP and Uclust algorithms, while taxonomy from HITdb has been assigned solely with RDP. The error bars represent upper and lower limits of 1000 bootstraps. b Venn diagrams showing genus and species level assignations between V1-V3 and V4-V6 synthetic reads for Greengenes and HITdb. The database and algorithm are indicated in columns and the taxonomic level in rows. The green and blue circles represent 16S rRNA gene regions V1-V3 and V4-V6, respectively. Jaccard index shows intersection relative to union for each diagram. The numbers represent absolute counts of assigned taxa