fastx_relabel command
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11-Aug-2018 New paper describes octave plots for visualizing alpha diversity.

12-Jun-2018 New paper shows that one in five taxonomy annotations in SILVA and Greengenes are wrong.

18-Apr-2018 New paper shows that taxonomy prediction accuracy is <50% for V4 sequences.

05-Oct-2017 PeerJ paper shows low accuracy of closed- and open-ref. QIIME OTUs.

22-Sep-2017 New paper shows 97% threshold is wrong, OTUs should be 99% full-length 16S, 100% for V4.

UPARSE tutorial video posted on YouTube. Make OTUs from MiSeq reads.



fastx_relabel command

See also
  fastx_strip_annots command

Re-labels sequences in a FASTA or FASTQ file. By default, the new labels are Seq1, Seq2, Seq3 etc. The prefix can be changed using the -prefix option.

Existing annotations are removed from the labels unless the -keep_annots option is specified.

The output filename is specified by -fastqout (FASTQ format) and / or -fastaout (FASTA format). You cannot create FASTQ output from FASTA input.


usearch -fastx_relabel otus.fa -prefix Otu -fastaout relabeled.fa -keep_annots