union reads in several sequences, concatenates them, and writes them out as a single sequence.

Here is a sample session with union. The file cds.list contains a list of the regions making up the coding sequence of the sequence "embl:hsfau":

% union
Reads sequence fragments and builds one sequence
Input sequence(s): @cds.list
Output sequence [hsfau1.fasta]: fau.cds

Mandatory qualifiers:

[-sequence] (seqall)

Sequence database USA.

[-outseq] (seqout)

Output sequence USA.