    New chain ID            Original chain ID

4v96-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                        BA
           Z                        BB
           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                        Ba
           z                        Bb
           0                        Bc
           1                        Bd
           2                        Be
           3                        Bf
           4                        Bg
           5                        Bh
           6                        Bi
           7                        Bj
           8                        Bk
           9                        Bl

4v96-pdb-bundle2.pdb:
           A                        Bm
           B                        Bn
           C                        Bo
           D                        Bp
           E                        Bq
           F                        Br
           G                        Bs
           H                        Bt
           I                        Bu
           J                        Bv
           K                        Bw
           L                        Bx
           M                        By
           N                        Bz
           O                        B1
           P                        B2
