/usr/share/dialign-tx/tseq is in dialign-tx-data 1.0.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4
>T1 mteqrtplvemkNISisFGGIHAVDDASVD >T2 mavlelvNISkhFGAIQAVSDVSLS