>1xn1H (H:) observed residues (from ATOM records)
sfkiafiqarwhadivdearksfvaelaaktggsveveifdvpgayeiplhaktlartgr
yaaivgaafvidggiyrhdfvatavingmmqvqletevpvlsvvltphhfheskehhdff
hahfkvkgveaahaalqivsersria