    New chain ID            Original chain ID

7nsi-pdb-bundle1.pdb:
           A                        B0
           B                        B1
           C                        B2
           D                        B3
           E                        B4
           F                        B5
           G                        B6
           H                        BB
           I                        B7
           J                        BD
           K                        BE
           L                        BF
           M                        BG
           N                        BI
           O                        BJ
           P                        BK
           Q                        BN
           R                        BO
           S                        BP
           T                        BQ
           U                        BR
           V                        BS
           W                        BT
           X                        BU
           Y                        BV
           Z                        BW
           a                        BX
           b                        BY
           c                        Ba
           d                        Bb
           e                        Bc
           f                        Bd
           g                        Be
           h                        Bf
           i                        Bg
           j                        B8
           k                        Bh
           l                        Bi
           m                        Bj
           n                        Bk
           o                        Bl
           p                        Bm
           q                        Bn
           r                        Bo
           s                        Bp
           t                        Bq
           u                        Bt
           v                        Bu
           w                        Bv
           x                        Bw
           y                        Bx
           z                        AA
           0                        B9
           1                        AV
           2                        AX

7nsi-pdb-bundle2.pdb:
           A                        BA
           B                        AB
           C                        AC
           D                        AE
           E                        AF
           F                        AG
           G                        AI
           H                        AJ
           I                        AK
           J                        AL
           K                        AN
           L                        AO
           M                        AP
           N                        AQ
           O                        AR
           P                        AU
           Q                        AZ
           R                        Aa
           S                        Ab
           T                        Ac
           U                        Ad
           V                        Ae
           W                        Af
           X                        Ag
           Y                        Ah
           Z                        Ai
           a                        Aj
           b                        Ak
           c                        Am
           d                        An
           e                        Ao
           f                        Ap
           g                        CL
           h                        DL
           i                        EL
           j                        FL
           k                        GL
           l                        HL
