/usr/include/seqan/blast/ is in seqan-dev 1.3-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/seqan/blast/blast_base.h
/usr/include/seqan/blast/blast_generated_forwards.h
/usr/include/seqan/blast/blast_hit.h
/usr/include/seqan/blast/blast_hit_iterator.h
/usr/include/seqan/blast/blast_hsp.h
/usr/include/seqan/blast/blast_hsp_iterator.h
/usr/include/seqan/blast/blast_iterator.h
/usr/include/seqan/blast/blast_parsing.h
/usr/include/seqan/blast/blast_report.h
/usr/include/seqan/blast/blast_run.h
/usr/include/seqan/blast/blast_stream_hit.h
/usr/include/seqan/blast/blast_stream_hit_iterator.h
/usr/include/seqan/blast/blast_stream_hsp_iterator.h
/usr/include/seqan/blast/blast_stream_report.h