/usr/share/EMBOSS/test/data/barcodes.pat is in emboss-test 6.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6
>bc_1 tcaggtagtactcg >bc_2 tcagggctaggcat >bc_3 cgacctcgactcga