    New chain ID            Original chain ID

4v46-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AI
           J                        AJ
           K                        AK
           L                        AL
           M                        AM
           N                        AN
           O                        AO
           P                        AP
           Q                        AQ
           R                        AR
           S                        AS
           T                        AT
           U                        AU
           V                        AV
           W                        AW
           X                        AX
           Y                        AY
           Z                        AZ
           a                        A0
           b                        A1
           c                        A2
           d                        A3
           e                        A4
           f                        A5
           g                        A6
           h                        A7
           i                        A8
           j                        A9
           k                        Aa
           l                        Ab
           m                        Ac
           n                        Ad
           o                        Ae
           p                        Af
           q                        Ag
           r                        Ah
           s                        Ai
           t                        Aj
           u                        Ak
           v                        Al
           w                        Am
           x                        An
           y                        Ao
           z                        Ap
           0                        Aq
           1                        Ar
           2                        As
           3                        At
           4                        Au
           5                        Av
           6                        Aw
           7                        Ax
           8                        BA
           9                        BB

4v46-pdb-bundle2.pdb:
           A                        BC
           B                        BD
           C                        BE
           D                        BF
           E                        BG
           F                        BH
           G                        BI
           H                        BJ
           I                        BK
           J                        BL
           K                        BM
           L                        BN
           M                        BO
           N                        BP
           O                        BQ
           P                        BR
           Q                        BS
           R                        BT
           S                        BU
           T                        BV
           U                        BW
           V                        BX
           W                        BY
           X                        BZ
           Y                        B0
           Z                        B1
           a                        B2
           b                        B3
           c                        B4
           d                        B5
           e                        B6
           f                        B7
           g                        B8
           h                        B9
           i                        Ba
           j                        Bb
           k                        Bc
           l                        Bd
           m                        Be
           n                        Bf
           o                        Bg
           p                        Bh
           q                        Bi
           r                        Bj
           s                        Bk
           t                        Bl
           u                        Bm
           v                        Bn
           w                        Bo
           x                        Bp
           y                        Bq
           z                        Br
           0                        Bs
           1                        Bt
           2                        Bu
           3                        Bv
           4                        Bw
           5                        Bx
