>3nx3A (A:) observed residues (from ATOM records)
qshiiptykrfdivlekgqgvylfddkakkyldfssgigvcalgynhakfnakikaqvdk
llhtsnlyyneniaaaaknlakasalervfftnsgtesiegamktarkyafnkgvkggqf
iafkhsfhgrtlgalsltanekyqkpfkplisgvkfakyndissveklvnektcaiiles
vqgegginpankdfykalrklcdekdilliadeiqcgmgrsgkffayehaqilpdimtsa
kalgcglsvgafvinqkvasnsleagdhgstyggnplvcagvnavfeifkeekilenvnk
ltpyleqsldelinefdfckkrkglgfmqglsldksvkvakviqkcqenallliscgend
lrflpplilqkehidemseklrkalksf