    New chain ID            Original chain ID

6b4v-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D

6b4v-pdb-bundle2.pdb:
           A                         E
           B                         F
           C                         G
           D                         H
           E                         I
           F                         J
           G                         K
           H                         L
           I                         M
           J                         N
           K                         O
           L                         P
           M                         Q
           N                         R
           O                         S
           P                         T
           Q                         U
           R                         V
           S                         W
           T                         X
           U                         Y
           V                         Z
           W                        AA
           X                        BA
           Y                        CA
           Z                        DA
           a                        EA
           b                        FA
           c                        GA
           d                        HA
           e                        IA
           f                        JA
           g                        KA
           h                        LA
           i                        MA
           j                        NA
           k                        OA
           l                        PA
           m                        QA
           n                        RA
           o                        SA
           p                        TA
           q                        UA
           r                        VA
           s                        WA
           t                        XA
           u                        YA
           v                        ZA
           w                        AB
           x                        BB
           y                        CB
           z                        DB
           0                        EB

6b4v-pdb-bundle3.pdb:
           A                        FB
           B                        GB
           C                        HB
           D                        IB
           E                        JB
           F                        KB
           G                        LB
           H                        MB
           I                        NB
           J                        OB
           K                        PB
           L                        QB
           M                        RB
           N                        SB
           O                        TB
           P                        UB
           Q                        VB
           R                        WB
           S                        XB
           T                        YB
           U                        ZB
           V                        AC
           W                        BC
           X                        CC
           Y                        DC
           Z                        EC
           a                        FC
           b                        GC
           c                        HC
           d                        IC
           e                        JC
           f                        KC
           g                        LC
           h                        MC
           i                        NC

6b4v-pdb-bundle4.pdb:
           A                        OC
           B                        PC
           C                        QC
           D                        RC
           E                        SC
           F                        TC
           G                        UC
           H                        VC
           I                        WC
           J                        XC
           K                        YC
           L                        ZC
           M                        AD
           N                        BD
           O                        CD
           P                        DD
           Q                        ED
           R                        FD
           S                        GD
           T                        HD
