>1z4sC (C:) observed residues (from ATOM records)
hhhhhfnlppgnykkpkllycsnghflrilpdgtvdgtrdrsdqhiqlqlsaesvgevyi
ksttgqylamdtdgllygsqtpneeclflerleenhyntyiskkhaeknwfvglkkngsc
krgprthygqkailflplpv