/usr/share/genometools/gtdata/trans/TransDNA_CBNP is in genometools-common 1.5.9+ds-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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aA cC gG tT nsywrkvbdhmNSYWRKVBDHMxpofXPOF