>1xnkB (B:) observed residues (from ATOM records)
etltssatgthngyyysfwtdgqgnirfnlesggqysvtwsgngnwvggkgwnpgtdnrv
inytadyrpngnsylavygwtrnplieyyvvesfgtydpstgatrmgsvttdggtyniyr
tqrvnapsiegtktfyqywsvrtskrtggtvtmanhfnawrqaglqlgshdyqivategy
yssgsatvnvg