>1rbyB (B:) observed residues (from ATOM records)
arvavlisgtgsnlqalidstrepnssaqidivisnkaavagldkaeragiptrvinhkl
yknrvefdsaidlvleefsidivclagfmrilsgpfvqkwngkmlnihpsllpsfkgsna
heqaletgvtvtgctvhfvaedvdagqiilqeavpvkrgdtvatlservklaehkifpaa
lqlvasgtvqlgengkicwv