    New chain ID            Original chain ID

4wqu-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AK
           J                        AL
           K                        AN
           L                        AO
           M                        AP
           N                        AQ
           O                        AR
           P                        AS
           Q                        AT
           R                        AU
           S                        AV
           T                        AW
           U                        AX
           V                        AY
           W                        AZ
           X                        A0
           Y                        A1
           Z                        A2
           a                        A3
           b                        A4
           c                        A5
           d                        A6
           e                        A7
           f                        A8
           g                        A9

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

4wqu-pdb-bundle3.pdb:
           A                        CA
           B                        CB
           C                        CC
           D                        CD
           E                        CE
           F                        CF
           G                        CG
           H                        CH
           I                        CK
           J                        CL
           K                        CN
           L                        CO
           M                        CP
           N                        CQ
           O                        CR
           P                        CS
           Q                        CT
           R                        CU
           S                        CV
           T                        CW
           U                        CX
           V                        CY
           W                        CZ
           X                        C0
           Y                        C1
           Z                        C2
           a                        C3
           b                        C4
           c                        C5
           d                        C6
           e                        C7
           f                        C8
           g                        C9

4wqu-pdb-bundle4.pdb:
           A                        DA
           B                        DB
           C                        DC
           D                        DD
           E                        DE
           F                        DF
           G                        DG
           H                        DH
           I                        DI
           J                        DJ
           K                        DK
           L                        DL
           M                        DM
           N                        DN
           O                        DO
           P                        DP
           Q                        DQ
           R                        DR
           S                        DS
           T                        DT
           U                        DU
           V                        DV
           W                        DW
           X                        DY
           Y                        DZ
           Z                        DX
