Chains and heterogens:
PDB Chain Sequences:
>2d81A (A:) talpafnvnpnsvsvsglasggymaaqlgvaysdvfnvgfgvfaggpydcarnqyytscm yngypsittptanmkswsgnqiasvanlgqrkiymwtgssdttvgpnvmnqlkaqlgnfd nsanvsyvtttgavhtfptdfngagdnscslstspyisncnydgagaalkwiygslnarn tgtlsgsvlsfaqsgsygangmdttgylyvpqscasgatvcslhvalhgclqsyssigsr fiqntgynkwadtnnmiilypqaipdytihaiwnggvlsnpngcwdwvgwygsnadqigg vqmaaivgqvkqivsgfq