>1xn1D (D:) observed residues (from ATOM records)
tsfkiafiqarwhadivdearksfvaelaaktggsveveifdvpgayeiplhaktlartg
ryaaivgaafvidggiyrhdfvatavingmmqvqletevpvlsvvltphhfheskehhdf
fhahfkvkgveaahaalqivsersria