Chains and heterogens:
PDB Chain Sequences:
>1ivb_ (-) epewtyprlscqgstfqkallisphrfgeikgnsapliirepfvacgpkecrhfalthya aqpggyyngtrkdrnklrhlvsvklgkiptvensifhmaawsgsachdgrewtyigvdgp dndalvkikygeaytdtyhsyahnilrtqesacnciggdcylmitdgsasgiskcrflki regriikeilptgrvehteectcgfasnktiecacrdnsytakrpfvklnvetdtaeirl mctktyldtprpddgsiagpcesngdkwlggikggfvhqrmaskigrwysrtmsktnrmg melyvrydgdpwtdsdaltlsgvmvsieepgwysfgfeikdkkcdvpcigiemvhdggkd twhsaataiyclmgsgqllwdtvtgvdmal