>3ch9A (A:) observed residues (from ATOM records)
assgyrsvvyfvnwaiygrnhnpqdlpverlthvlyafanvrpetgevymtdswadiekh
ypgdswsdtgnnvygcikqlyllkkqnrnlkvllsiggwtyspnfapaastdagrknfak
tavkllqdlgfdgldidweypendqqandfvlllkevrtaldsysaanaggqhflltvas
pagpdkikvlhlkdmdqqldfwnlmaydyagsfsslsghqanvyndtsnplstpfntqta
ldlyraggvpankivlgmplygrsfantdgpgkpyngvgqgswengvwdykalpqagate
hvlpdimasysydatnkflisydnpqvanlksgyikslglggamwwdsssdktgsdslit
tvvnalggtgvfeqsqneldypvsqydnlrngmqt