code: def _create_sequences(self):
          '''Get all of the Sequences - Rosetta, ATOM, SEQRES, FASTA, UniParc.'''
          try:
              self.pdb.construct_pdb_to_rosetta_residue_map(self.rosetta_scripts_path, rosetta_database_path = self.rosetta_database_path, cache_dir = self.cache_dir)
          except PDBMissingMainchainAtomsException:
              self.pdb_to_rosetta_residue_map_error = True
          if self.pdb_id not in do_not_use_the_sequence_aligner:
              self.uniparc_sequences = self.PDB_UniParc_SA.uniparc_sequences
          else:
              self.uniparc_sequences = self.sifts.get_uniparc_sequences()
          self.fasta_sequences = self.FASTA.get_sequences(self.pdb_id)
          self.seqres_sequences = self.pdb.seqres_sequences
          self.atom_sequences = self.pdb.atom_sequences
          if self.pdb_to_rosetta_residue_map_error:
              self.rosetta_sequences = {}
              for c in self.atom_sequences.keys():
                  self.rosetta_sequences[c] = Sequence()
          else:
              self.rosetta_sequences = self.pdb.rosetta_sequences
          uniparc_pdb_chain_mapping = {}
          if self.pdb_id not in do_not_use_the_sequence_aligner:
              for pdb_chain_id, matches in self.PDB_UniParc_SA.clustal_matches.iteritems():
                  if matches:
                      uniparc_chain_id = matches.keys()[0]
                      assert(len(matches) == 1)
                      uniparc_pdb_chain_mapping[uniparc_chain_id] = uniparc_pdb_chain_mapping.get(uniparc_chain_id, [])
                      uniparc_pdb_chain_mapping[uniparc_chain_id].append(pdb_chain_id)
          else:
              for pdb_chain_id, uniparc_chain_ids in self.sifts.get_pdb_chain_to_uniparc_id_map().iteritems():
                  for uniparc_chain_id in uniparc_chain_ids:
                      uniparc_pdb_chain_mapping[uniparc_chain_id] = uniparc_pdb_chain_mapping.get(uniparc_chain_id, [])
                      uniparc_pdb_chain_mapping[uniparc_chain_id].append(pdb_chain_id)
          for uniparc_chain_id, pdb_chain_ids in uniparc_pdb_chain_mapping.iteritems():
              sequence_type = set([self.seqres_sequences[p].sequence_type for p in pdb_chain_ids])
              assert(len(sequence_type) == 1)
              sequence_type = sequence_type.pop()
              assert(self.uniparc_sequences[uniparc_chain_id].sequence_type == None)
              self.uniparc_sequences[uniparc_chain_id].set_type(sequence_type)
              for p in pdb_chain_ids:
                  self.pdb_chain_to_uniparc_chain_mapping[p] = uniparc_chain_id
          for chain_id, sequence in self.seqres_sequences.iteritems():
              self.fasta_sequences[chain_id].set_type(sequence.sequence_type)