    New chain ID            Original chain ID

9s33_1-pdb-bundle1.pdb:
           A                        A1
           B                        B1
           C                        C1
           D                        D1
           E                        E1
           F                        F1
           G                        G1
           H                        H1
           I                        I1
           J                        J1
           K                        K1
           L                        L1
           M                        A2
           N                        B2
           O                        C2
           P                        D2
           Q                        E2
9s33_1-pdb-bundle2.pdb:
           A                        E2
           B                        F2
           C                        G2
           D                        H2
           E                        I2
           F                        J2
           G                        K2
           H                        L2
