>2ff4A (A:) observed residues (from ATOM records)
ekrldfgllgplqmtidgtpvpsgtpkqravlamlvinrnrpvgvdalitalweewppsg
arasihsyvsnlrkllggagidprvvlaaappgyrlsipdntcdlgrfvaektagvhaaa
agrfeqasrhlsaalrewrgpvlddlrdfqfvepfatalvedkvlahtakaeaeiacgra
saviaelealtfehpyreplwtqlitayylsdrqsdalgayrrvkttladdlgidpgptl
ralnerilrqqpldakksakttaagtvtvldqrtmasgqqavaylhdiasgrgyplqaaa
trigrlhdndivldsanvsrhhavivdtgtnyvindlrssngvhvqherirsavtlndgd
hiricdheftfqisagthg