    New chain ID            Original chain ID

5aa0-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AK
           J                        AL
           K                        AM
           L                        AN
           M                        AO
           N                        AP
           O                        AQ
           P                        AR
           Q                        AS
           R                        AT
           S                        AU
           T                        AV
           U                        AW
           V                        AX
           W                        AY
           X                        AZ
           Y                        Aa
           Z                        Ab
           a                        Ac
           b                        Ad
           c                        Ae
           d                        Af
           e                        AI
           f                        AJ
           g                        Ag

5aa0-pdb-bundle2.pdb:
           A                        BA
           B                        BF
           C                        BG
           D                        BH
           E                        BI
           F                        BJ
           G                        BK
           H                        BL
           I                        BM
           J                        BN
           K                        BO
           L                        BP
           M                        BQ
           N                        BR
           O                        BS
           P                        BT
           Q                        BU
           R                        BV
           S                        BW
           T                        BX
           U                        BY
           V                        BC
           W                        BD
           X                        BE
           Y                        BZ
