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Modeling a supramolecular assembly in a hierarchical manner. Each ‘Assembly Symmetry’ may contain multiple children. Children can either be ‘Assembly Symmetries’ or ‘Subunits’. A ‘Subunit’ represents a PDB file or a geometric model. Internal nodes consist of ‘Assembly Symmetries’, whereas each leaf must be a ‘Subunit’. There may be an arbitrary number of hierarchy levels and nodes at each level.
