>1k9tA (A:) observed residues (from ATOM records)
aapgkptiawgntkfaivevdqaataynnlvkvknaadvsvswnlwngdtgttakvllng
keawsgpstgssgtanfkvnkggryqmqvalcnadgctasdateivvadtdgshlaplke
plleknkpykqnsgkvvgsyfvewgvygrnftvdkipaqnlthllygfipicggnginds
lkeiegsfqalqrscqgredfkvsihdpfaalqkaqkgvtawddpykgnfgqlmalkqah
pdlkilpsiggwtlsdpfffmgdkvkrdrfvgsvkeflqtwkffdgvdidwefpggkgan
pnlgspqdgetyvllmkelramldqlsvetgrkyeltsaisagkdkidkvaynvaqnsmd
hiflmsyafygafdlknlghqtalnapawkpdtayttvngvnallaqgvkpgkivvgtam
ygrgwtgvngyqnnipftgtatgpvkgtwengivdyrqiagqfmsgewqytydataeapy
vfkpstgdlitfddarsvqakgkyvldkqlgglfsweidadngdilnsmnaslgnsag