>1xznA (A:) observed residues (from ATOM records)
mqkavvmdeqairraltriaheiiernkgidgcvlvgiktrgiylarrlaerieqiegas
vpvgelditlyrvpfpvternvilvddvlftgrtvraamdavmdlgrpariqlavlvdrg
hrelpiradfvgknvptsrselivvelsevdgidqvsihek