>5xrsB (B:) observed residues (from ATOM records)
gifgaiagfiengwegmvdgwygfrhqnsegtgqaadlkstqaainqitgklnrvikktn
ekfhqiekefsevegriqdlekyvedtkidlwsynaellvalenqhtidltdsemsklfe
rtrrqlrenaedmgngcfkiyhkcdnacigsirngtydhdiyrnealnnrfq