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Chimeras
 
cluster_otus OTU clustering with chimera filtering (UPARSE-OTU algorithm)
uchime2_ref Find chimeras by database search
uchime3_denovo Filter chimeras in denoised amplicon sequences
unoise3 Correct errors (denoise) amplicon reads, includes chimera filter
uparse_ref Classify mock community sequences (recognizes chimeras and read errors)