    New chain ID            Original chain ID

6gz4-pdb-bundle1.pdb:
           A                        AA
           B                        BA
           C                        AB
           D                        BB
           E                        AC
           F                        BC
           G                        A2
           H                        Bv
           I                        Bx
           J                        Bw

6gz4-pdb-bundle2.pdb:
           A                        B1
           B                        BD
           C                        BF
           D                        BK
           E                        BM
           F                        BP
           G                        BQ
           H                        BR
           I                        BS
           J                        BT
           K                        BU
           L                        BZ
           M                        Bc
           N                        Bd
           O                        Bf
           P                        Bg
           Q                        BE
           R                        BG
           S                        BH
           T                        BI
           U                        BJ
           V                        BL
           W                        BN
           X                        BO
           Y                        BV
           Z                        BW
           a                        BX
           b                        BY
           c                        Ba
           d                        Bb
           e                        Be
           f                        A3
           g                        A4
           h                        AD
           i                        AE
           j                        AF
           k                        AG
           l                        AH
           m                        AI
           n                        AJ
           o                        AL
           p                        AM
           q                        AN
           r                        AO
           s                        AP
           t                        AQ
           u                        AR

6gz4-pdb-bundle3.pdb:
           A                        AS
           B                        AT
           C                        AU
           D                        AV
           E                        AW
           F                        AX
           G                        AY
           H                        AZ
           I                        Aa
           J                        Ab
           K                        Ac
           L                        Ad
           M                        Ae
           N                        Af
           O                        Ag
           P                        Ah
           Q                        Ai
           R                        Aj
           S                        Ak
           T                        Al
           U                        Am
           V                        An
           W                        Ao
           X                        Ap
           Y                        At
           Z                        Au
           a                        Aq
           b                        AK
           c                        Ct
