1. Fractions of 16S rRNA genes from bacteria (top panel) and archaea (bottom panel) in public databases from primer-amplified metagenomes (with and without read depths) and metatranscriptomes at different percent identities with their closest cultured relative.
Fractions of 16S rRNA genes from bacteria (top panel) and archaea (bottom panel) in public databases from primer-amplified metagenomes (with and without read depths) and metatranscriptomes at different percent identities with their closest cultured relative. Vertical dashed lines represent estimated cutoff levels for different taxonomic levels of novelty relative to all cultures (indicated at the top of the panel) (9). Primer-amplified bacterial sequences showed 30% to up to 100% similarity to their closest cultured relative but were removed for clarity.
Karen G. Lloyd et al. mSystems 2018; doi: /mSystems