>1z4qA (A:) observed residues (from ATOM records)
ralrvlvnmdgvladfeggflrkfrarfpdqpfialedrrgfwvseqygrlrpglsekai
siwesknfffeleplpgaveavkemaslqntdvfictspikmfkycpyekyawvekyfgp
dfleqivltrdktvvsadlliddrpditgaeptpswehvlftachnqhlqlqpprrrlhs
waddwkaildskrp