>1z7xW (W:) observed residues (from ATOM records)
sldiqsldiqceelsdarwaellpllqqcqvvrlddcgltearckdissalrvnpalael
nlrsnelgdvgvhcvlqglqtpsckiqklslqnccltgagcgvlsstlrtlptlqelhls
dnllgdaglqllceglldpqcrleklqleycslsaasceplasvlrakpdfkeltvsnnd
ineagvrvlcqglkdspcqlealklescgvtsdncrdlcgivaskaslrelalgsnklgd
vgmaelcpgllhpssrlrtlwiwecgitakgcgdlcrvlrakeslkelslagnelgdega
rllcetllepgcqleslwvkscsftaaccshfssvlaqnrfllelqisnnrledagvrel
cqglgqpgsvlrvlwladcdvsdsscsslaatllanhslreldlsnnclgdagilqlves
vrqpgclleqlvlydiywseemedrlqalekdkpslrvis