RESCRIPt: Reproducible sequence taxonomy reference database management
Fig 2
Comparison of sequence information from SILVA, Greengenes, GTDB, and NCBI-RefSeq 16S rRNA gene databases.
A, Sequence length distributions (after removing outliers, see materials and methods). B, Number of unique sequences in each database. C, Entropy of full-length sequences and different kmer lengths in each database.