>4czuB (B:) observed residues (from ATOM records)
ihsgrtrvgkyelgrtlgegtfakvkfarnvengdnvaikvidkekvlknkmiaqikrei
stmklikhpnvirmfevmasktkiyfvlefvtggelfdkissngrlkedearkyfqqlin
avdychsrgvyhrdlkpenllldangalkvsdfglsalpqqvredgllhdtcgtpnyvap
evinnkgydgakadlwscgvilfvlmagylpfedsnltslykkifkaeftcppwfsasak
klikrildpnpatritfaevienewfkkgykapkfeddvdaifddsg