>2f2tB (B:) observed residues (from ATOM records)
hhhhhhmrkiyiagpavfnpdmgasyynkvrellkkenvmpliptdneatealdirqkni
qmikdcdaviadlspfrghepdcgtafevgcaaalnkmvltftsdrrnmrekygsgvdkd
nlrvegfglpfnlmlydgvevfdsfesafkyflanfps