    New chain ID            Original chain ID

4v8k-pdb-bundle1.pdb:
           A                        AC
           B                        AL
           C                        AM
           D                        AH
           E                        AA
           F                        AB
           G                        AD
           H                        AE
           I                        AF
           J                        AG
           K                        AI
           L                        AJ
           M                        AK
           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                        A1
           b                        A2
           c                        A3
           d                        A4
           e                        A5
           f                        A6
           g                        A7
           h                        A8
           i                        A9
           j                        A0
           k                        BC
           l                        BL
           m                        BM
           n                        BH
           o                        BA
           p                        BB
           q                        BD
           r                        BE
           s                        BF
           t                        BG
           u                        BI
           v                        BJ
           w                        BK
           x                        BN
           y                        BO
           z                        BP
           0                        BQ
           1                        BR
           2                        BS
           3                        BT
           4                        BU
           5                        BV
           6                        BW
           7                        BX
           8                        BY
           9                        BZ

4v8k-pdb-bundle2.pdb:
           A                        B1
           B                        B2
           C                        B3
           D                        B4
           E                        B5
           F                        B6
           G                        B7
           H                        B8
           I                        B9
           J                        B0
