>3i54B (B:) observed residues (from ATOM records)
nlyfqshmdeilaragifqepsaiaallqpvdfprghtvfaegepgdrlyiiisgkvkig
rrnlltimgpsdmfgelsifdpgprtssattitevravsmdrdalrswiadrpeiseqll
rvlarrlrrtnnnladliftdvpgrvakqllqlaqrfgtqeggalrvthdltqeeiaqlv
gasretvnkaladfahrgwirlegksvlisdserlarra