>1r51A (A:) observed residues (from ATOM records)
savkaarygkdnvrvykvhkdektgvqtvyemtvcvllegeietsytkadnsvivatdsi
kntiyitakqnpvtppelfgsilgthfiekynhihaahvnivchrwtrmdidgkphphsf
irdseekrnvqvdvvegkgidiksslsgltvlkstnsqfwgflrdeyttlketwdrilst
dvdatwqwknfsglqevrshvpkfdatwatarevtlktfaednsasvqatmykmaeqila
rqqlietveyslpnkhyfeidlswhkglqntgknaevfapqsdpnglikctvgrss