>1xn1E (E:) observed residues (from ATOM records)
nktsfkiafiqarwhadivdearksfvaelaaktggsveveifdvpgayeiplhaktlar
tgryaaivgaafvidggiyrhdfvatavingmmqvqletevpvlsvvltphhfheskehh
dffhahfkvkgveaahaalqivsersri