    New chain ID            Original chain ID

6tz5-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        BB
           D                        CB
           E                        DB
           F                        EB
           G                        FB
           H                        GB
           I                        HB
           J                        IB
           K                        JB
           L                        KB
           M                        LB
           N                        MB
           O                        NB
           P                        OB
           Q                        PB
           R                        QB
           S                        TA
           T                        SA
           U                        VA
           V                        UA
           W                        XA
           X                        WA
           Y                        ZA
           Z                        YA
           a                        BA
           b                         A
           c                        CA
           d                        DA
           e                        EA
           f                        FA
           g                        GA
           h                        HA
           i                        IA
           j                        JA
           k                        KA
           l                        LA
           m                        MA
           n                        NA
           o                        OA
           p                        PA
           q                        QA
           r                        RA
           s                         B
           t                         C
           u                         D
           v                         E
           w                         F
           x                         G
           y                         H
           z                         I
           0                         J
           1                         K
           2                         L
           3                         M
           4                         N
           5                         O
           6                         P
           7                         Q
           8                         R
           9                         S

6tz5-pdb-bundle2.pdb:
           T                         T
           V                         V
           W                         W
           X                         X
           Y                         Y
           Z                         Z
