>1f51A (A:) observed residues (from ATOM records)
isdtaltnelihllghsrhdwmnklqlikgnlslqkydrvfemieemvidakhesklsnl
ktphlafdfltfnwkthymtleyevlgeikdlsaydqklaklmrklfhlfdqavsresen
hltvslqtdhpdrqlilyldfhgafadpsafddirqngyedvdimrfeitsheclieigl
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