Video talks on 16S data analysis posted.

URMAP ultra-fast read mapper posted (paper).

~20% of taxonomy annotations in SILVA and Greengenes are wrong (paper).

Taxonomy prediction is <50% accurate for 16S V4 sequences (paper).

97% OTU threshold is wrong for species, should be 99% for full-length 16S, 100% V4 (paper).

fastx_get_sample_names command

Reports the sample identifiers found in seqence labels. The -output option specifies a text file to contain one line per identifier. This is useful as a check that your sample identifiers are formatted correctly.

Example

usearch -fastx_get_sample_names reads.fa -output samples.txt