>4x0zB (B:) observed residues (from ATOM records)
vevlevktgvdsitevecfltpemgdpdehlrgfsksisisdtfesdspnkdmlpcysva
riplpnlilmweavtlktevigvttlmnvhsngqathdngaakpvqgtsfhffsvggeal
elqgvvfnyrttypdgtifpknatvqsqvmntehkayldknkaypvecwvpdptrnentr
yfgtltggenvppvlhitntattvlldefgvgplckgdnlylsavdvcgmftnrsgsqqw
rglsryfkvqlrkrrvk