>1xknA (A:) observed residues (from ATOM records)
septyfmppewaphastwlswphkleswpgkfepvpavfaelayqlsrsetvninvldda
meaqarellkerdpegkyaerivfhriptndawcrdhgpnyvirtqdgrrdkvimnweyn
awggkyepydddnavpervakaqglpmvstgmvleggaidvngagllltttacllnpnrn
pslgkaeieaqlrrylgiekvlwlgdgiagddtdghvddmarfvnentvviaveedpede
nykplrenyellktmtgldgkplnivklpmpepvyydgerlpasyanfyiantvvlvpty
rcprdqqaidilqqcfpkrevvgidcsdliwglgaihcvtheepamlehhhhh