    New chain ID            Original chain ID

4v65-pdb-bundle1.pdb:
           A                        AA
           B                        AP
           C                        AE
           D                        AM
           E                        A1
           F                        AB
           G                        AC
           H                        AD
           I                        AF
           J                        AG
           K                        AH
           L                        AI
           M                        AJ
           N                        AK
           O                        AL
           P                        AN
           Q                        AO
           R                        AQ
           S                        AR
           T                        AS
           U                        AT
           V                        AU
           W                        AV
           X                        AW
           Y                        AX
           Z                        BA

4v65-pdb-bundle2.pdb:
           A                        BB
           B                        BC
           C                        BD
           D                        BE
           E                        BF
           F                        BG
           G                        BH
           H                        BI
           I                        BJ
           J                        BK
           K                        BL
           L                        BM
           M                        BN
           N                        BO
           O                        BP
           P                        BQ
           Q                        BR
           R                        BS
           S                        BT
           T                        BU
           U                        BV
           V                        BW
           W                        BX
           X                        BY
           Y                        BZ
           Z                        B1
           a                        B2
           b                        B3
           c                        B4
           d                        B5
           e                        B6
