>4kthF (F:) observed residues (from ATOM records)
ieggwqgmvdgwygyhhsneqgsgyaadkestqkaidgvtnkvnsiidkmntqfeavgre
fnnlerrienlnkkmedgfldvwtynaellvlmenertldfhdsnvrnlydkvrlqlkdn
akelgngcfefyhkcdnecmesvrngtydypqyseearlkree