>3nx3B (B:) observed residues (from ATOM records)
krfdivlekgqgvylfddkakkyldfssgigvcalgynhakfnakikaqvdkllhtsnly
yneniaaaaknlakasalervfftnsgtesiegamktarkyafnkgvkggqfiafkhsfh
grtlgalsltanekyqkpfkplisgvkfakyndissveklvnektcaiilesvqgeggin
pankdfykalrklcdekdilliadeiqcgmgrsgkffayehaqilpdimtsakalgcgls
vgafvinqkvasnsleagdhgstyggnplvcagvnavfeifkeekilenvnkltpyleqs
ldelinefdfckkrkglgfmqglsldksvkvakviqkcqenallliscgendlrflppli
lqkehidemseklrkalksf