    New chain ID            Original chain ID

4v7k-pdb-bundle1.pdb:
           A                        Ab
           B                        Ac
           C                        Ad
           D                        Ae
           E                        Af
           F                        Ag
           G                        Ah
           H                        Ai
           I                        Aj
           J                        Ak
           K                        Al
           L                        Am
           M                        An
           N                        Ao
           O                        Ap
           P                        Aq
           Q                        Ar
           R                        As
           S                        At
           T                        Au
           U                        Ay
           V                        Aa
           W                        Ax
           X                        Av
           Y                        Aw
           Z                        AC
           a                        AD
           b                        AE
           c                        AF
           d                        AG
           e                        AH
           f                        AI
           g                        AJ
           h                        AN
           i                        AO
           j                        AP
           k                        AQ
           l                        AR
           m                        AS
           n                        AT
           o                        AU
           p                        AV
           q                        AW
           r                        AX
           s                        AY
           t                        AZ
           u                        A0
           v                        A1
           w                        A2
           x                        A3
           y                        A4
           z                        A5
           0                        A6
           1                        A7
           2                        A8
           3                        A9

4v7k-pdb-bundle2.pdb:
           A                        AA
           B                        AB
           C                        Bb
           D                        Bc
           E                        Bd
           F                        Be
           G                        Bf
           H                        Bg
           I                        Bh
           J                        Bi
           K                        Bj
           L                        Bk
           M                        Bl
           N                        Bm
           O                        Bn
           P                        Bo
           Q                        Bp
           R                        Bq
           S                        Br
           T                        Bs
           U                        Bt
           V                        Bu
           W                        By

4v7k-pdb-bundle3.pdb:
           A                        Ba
           B                        Bx
           C                        Bv
           D                        Bw
           E                        BC
           F                        BD
           G                        BE
           H                        BF
           I                        BG
           J                        BH
           K                        BI
           L                        BJ
           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                        B0
           a                        B1
           b                        B2
           c                        B3
           d                        B4
           e                        B5
           f                        B6
           g                        B7
           h                        B8
           i                        B9

4v7k-pdb-bundle4.pdb:
           A                        BA
           B                        BB
