>4xkfA (A:) observed residues (from ATOM records)
pgdkicigyhannsttqvdtlleknvtvthsvellenqkekrfckimnkapldlkdctie
gwilgnpkcdlllgdqswsyiverpnaqngicypgvlneleelkafigsgerverfemfp
kstwagvdtsrgvtnacpsytidssfyrnlvwivktdsatypvikgtynntgtqpilyfw
gvhhpldttvqdnlygsgdkyvrmgtesmnfakspeiaarpavngqrsridyywsvlrpg
etlnvesngnliapwyaykfvstnkgavfksdlpiencdatcqtitgvlrtnktfqnvsp
lwigecpkyvkseslrlatglrnvpqiat