What it does

Merge strictly identical sequences contained in filename. Identical sequences are defined as having the same length and the same string of nucleotides (case insensitive, T and U are considered the same).

Dereplication options

--derep_fulllength FILENAME
	dereplicate sequences in the given FASTA file
--maxuniquesize INT
	maximum abundance for output from dereplication
--minuniquesize INT
	minimum abundance for output from dereplication
--output FILENAME
	output FASTA file
--sizein	read abundance annotation from input
--sizeout	write abundance annotation to output
--strand	dereplicate "plus" or "both" strands (plus)
--topn INT	output just the n most abundant sequences
--uc FILENAME	filename for UCLUST-like output

For details about this tool, please refer to the GitHub repository or the vsearch manual.