>1n4rF (F:) observed residues (from ATOM records)
ldflrdrhvrffqrclqvlperyssletsrltiaffalsgldmldsldvvnkddiiewiy
slqvlptedrsnldrcgfrgssylgipfnpsknpgtahpydsghiamtytglscliilgd
dlsrvdkeaclaglralqledgsfcavpegsendmrfvycascicymlnnwsgmdmkkai
syirrsmsydnglaqgagleshggstfcgiaslclmgkleevfsekelnrikrwcimrqq
ngyhgrpnkpvdtcysfwvgatlkllkifqytnfeknrnyilstqdrlvggfakwpdshp
dalhayfgicglslmeesgickvhpalnvstrtserlrdlhqswkt