    New chain ID            Original chain ID

6q9b-pdb-bundle1.pdb:
           A                        S2
           B                        D3
           C                        D1
           D                        D6
           E                        4L
           F                        D5
           G                        D4
           H                        D2
           I                        AK
           J                        B5
           K                        AB
           L                        A8
           M                        BJ
           N                        AJ
           O                        S5
           P                        A3
           Q                        B3
           R                        C2
           S                        B4
           T                        AM
           U                        B6
           V                        B7
           W                        B9
           X                        B2
           Y                        B8
           Z                        BK
           a                        C1
           b                        B1
           c                        A1
