The aligned protein sequences and their families from Pfam:

ftp://ftp.ebi.ac.uk/pub/databases/Pfam/releases/Pfam32.0/Pfam-A.seed.gz

Stockholm format is a multiple sequence alignment format used by Pfam.

See: https://en.wikipedia.org/wiki/Stockholm_format

Attribute description:

- sequence: amino acid sequence (corresponding to a domain)

- sequencename: UniProtID/start-end position of the domain

- family_id: short name of the protein family

- family_accession: PFam family identifier (PFxxxxx.y)

- aligned_sequence: single sequence from the multiple sequence alignment

                    (with the rest of the members of the family in seed),

                    with gaps retained.