>4cx7B (B:) observed residues (from ATOM records)
rhvriknwgsgmtfqdtlhhkakgiclgsimtpksltrgprdkptppdellpqaiefvnq
yygsfkeakieehlarveavtkeiettgtyqltgdelifatkqawrnaprcigriqwsnl
qvfdarscstaremfehicrhvrystnngnirsaitvfpqrsdgkhdfrvwnaqliryag
yqmpdgsirgdpanveftqlcidlgwkpkygrfdvvplvlqangrdpelfeippdlvlev
amehpkyewfrelelkwyalpavanmllevgglefpgcpfngwymgteigvrdfcdvqry
nileevgrrmglethklaslwkdqavveiniavlhsfqkqnvtimdhhsaaesfmkymqn
eyrsrggcpadwiwlvppmsgsitpvfhqemlnyvlspfyyyqveawkthvwqd