>1r4zB (B:) observed residues (from ATOM records)
hnpvvmvhgiggasfnfagiksylvsqgwsrdklyavdfwdktgtnynngpvlsrfvqkv
ldetgakkvdivahsmggantlyyiknldggnkvanvvtlgganrlttgkalpgtdpnqk
ilytsiyssadmivmnylsrldgarnvqihgvghigllyssqvnslikeglngggqntn