    New chain ID            Original chain ID

4v6i-pdb-bundle1.pdb:
           A                        Aa
           B                        AA
           C                        AB
           D                        AD
           E                        AC
           F                        AE
           G                        AG
           H                        AF
           I                        AH
           J                        AI
           K                        AJ
           L                        AK
           M                        AL
           N                        AM
           O                        AN
           P                        AO
           Q                        AQ
           R                        AP
           S                        AR
           T                        AS
           U                        AT
           V                        AV
           W                        AW
           X                        AX
           Y                        AY
           Z                        AZ
           a                        Ab
           b                        Ac
           c                        AU
           d                        BA
           e                        BB
           f                        BC
           g                        BD
           h                        BE
           i                        BG
           j                        BF
           k                        BH
           l                        Bs
           m                        BJ
           n                        BK
           o                        BN
           p                        BM
           q                        BP
           r                        BO
           s                        BR
           t                        BT
           u                        BU
           v                        BW
           w                        BV
           x                        BX
           y                        BZ
           z                        BY
           0                        Ba
           1                        Bd
           2                        Bc
           3                        Bf
           4                        Be
           5                        Bg
           6                        Bh
           7                        Bi
           8                        Bj
           9                        Bk

4v6i-pdb-bundle2.pdb:
           A                        Bm
           B                        Bl
           C                        Bn
           D                        Bo
           E                        Bp
           F                        Bq
           G                        Br
           H                        Bx
           I                        By
           J                        Bz
           K                        Bt
           L                        Bu
           M                        Bv
           N                        Bw
           O                        BQ
           P                        BL
           Q                        BS
           R                        BI
           S                        CA
           T                        CB
           U                        CC

4v6i-pdb-bundle3.pdb:
           A                        DA
           B                        DB
           C                        DC
