>1f18A (A:) observed residues (from ATOM records)
vqavavlkgdagvsgvvkfeqasesepttvsyeiagnspnaergfhihefgdatngcvsa
gphfnpfkkthgaptdevrhvgdmrnvktdengvakgsfkdslikligptsvvgrsvvih
agqddlgkgdteeslktgnagprpacgvigltn