>4xfqA (A:) observed residues (from ATOM records)
aglrkmaqpsgvvekcivrvcygnmalnglwlgdtvmcprhviassttstidydyalsvl
rlhnfsissgnvflgvvgvtmrgallqikvnqnnvhtpkytyrtvrpgesfnilacydga
aagvygvnmrsnytirgsfingacgspgyninngtvefcylhqlelgsgchvgsdldgvm
yggyedqptlqvegasslftenvlaflyaalingstwwlsssriavdrfnewavhngmtt
vvntdcfsilaaktgvdvqrllasiqslhknfggkqilgytsltdefttgevirqmyg