entities:
  - protein: 
      id: C
      sequence: 8..18
      cyclic: true
  - file:
      path: 1mk5.cif
       
      include: 
        - chain:
            id: A

      structure_groups:
        - group:
            id: A
            visibility: 1
        - group:
            id: A
            visibility: 0
            res_index: 32..42