    New chain ID            Original chain ID

9efk-pdb-bundle1.pdb:
           A                         A
           B                         M
           C                         N
           D                         O
           E                         P
           F                         Q
           G                         R
           H                        AE
           I                        AF
           J                        AG
           K                        AN
           L                        AO
           M                        AP
           N                        AW
           O                        AX
           P                        AY
           Q                        BF
           R                        BG
           S                        BH
           T                        BO
           U                        BP
           V                        BQ
           W                        BX
           X                        BY
           Y                        BZ
           Z                         B
           a                         C
           b                         D
           c                         E
           d                         F
           e                         G
           f                         H
           g                         I

9efk-pdb-bundle2.pdb:
           A                         J
           B                         K
           C                         L
           D                         T
           E                        AC
           F                        AD
           G                         S
           H                         X
           I                         U
           J                         V
           K                         W
           L                         Y
           M                         Z
           N                        AA
           O                        AB
