/usr/include/Bpp/Seq/Io/ is in libbpp-seq-dev 2.1.0-1ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Bpp/Seq/Io/AbstractIAlignment.h
/usr/include/Bpp/Seq/Io/AbstractISequence.h
/usr/include/Bpp/Seq/Io/AbstractOAlignment.h
/usr/include/Bpp/Seq/Io/AbstractOSequence.h
/usr/include/Bpp/Seq/Io/BppOAlignmentReaderFormat.h
/usr/include/Bpp/Seq/Io/BppOAlignmentWriterFormat.h
/usr/include/Bpp/Seq/Io/BppOAlphabetIndex1Format.h
/usr/include/Bpp/Seq/Io/BppOAlphabetIndex2Format.h
/usr/include/Bpp/Seq/Io/BppOSequenceReaderFormat.h
/usr/include/Bpp/Seq/Io/BppOSequenceStreamReaderFormat.h
/usr/include/Bpp/Seq/Io/BppOSequenceWriterFormat.h
/usr/include/Bpp/Seq/Io/Clustal.h
/usr/include/Bpp/Seq/Io/Dcse.h
/usr/include/Bpp/Seq/Io/Fasta.h
/usr/include/Bpp/Seq/Io/GenBank.h
/usr/include/Bpp/Seq/Io/ISequence.h
/usr/include/Bpp/Seq/Io/ISequenceStream.h
/usr/include/Bpp/Seq/Io/IoSequence.h
/usr/include/Bpp/Seq/Io/IoSequenceFactory.h
/usr/include/Bpp/Seq/Io/IoSequenceStream.h
/usr/include/Bpp/Seq/Io/Mase.h
/usr/include/Bpp/Seq/Io/MaseTools.h
/usr/include/Bpp/Seq/Io/NexusIoSequence.h
/usr/include/Bpp/Seq/Io/NexusTools.h
/usr/include/Bpp/Seq/Io/OSequence.h
/usr/include/Bpp/Seq/Io/OSequenceStream.h
/usr/include/Bpp/Seq/Io/PhredPhd.h
/usr/include/Bpp/Seq/Io/PhredPoly.h
/usr/include/Bpp/Seq/Io/Phylip.h
/usr/include/Bpp/Seq/Io/SequenceFileIndex.h
/usr/include/Bpp/Seq/Io/Stockholm.h
/usr/include/Bpp/Seq/Io/StreamSequenceIterator.h