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closed_ref OTU assignment by database matching
cluster_agg Agglomerative clustering, input is sequences
cluster_aggd Agglomerative clustering, input is distance matrix
cluster_edges Construct connected components from graph edges
cluster_fast Greedy clustering (UCLUST algorithm)
cluster_otus OTU clustering with chimera filtering (UPARSE-OTU algorithm)
cluster_smallmem Greedy clustering (UCLUST algorithm)
derep_fulllength Find unique sequences and abundances (old name for fastx_uniques)
fastx_uniques Find unique sequences and abundances
unoise3  Denoising (ZOTU clustering) with chimera filtering (UNOISE algorithm)