    New chain ID            Original chain ID

6p5n-pdb-bundle1.pdb:
           A                         5
           B                         7
           C                         8
           D                        AA
           E                        AB
           F                        AC
           G                        AD
           H                        AE
           I                        AF
           J                        AG

6p5n-pdb-bundle2.pdb:
           A                        AH
           B                        AI
           C                        AJ
           D                        AL
           E                        AM
           F                        AN
           G                        AO
           H                        AP
           I                        AQ
           J                        AR
           K                        AS
           L                        AT
           M                        AU
           N                        AV
           O                        AW
           P                        AX
           Q                        AY
           R                        AZ
           S                        Aa
           T                        Ab
           U                        Ac
           V                        Ad
           W                        Ae
           X                        Af
           Y                        Ag
           Z                        Ah
           a                        Ai
           b                        Aj
           c                        Ak
           d                        Al
           e                        Am
           f                        An
           g                        Ao
           h                        Ap
           i                        Ar
           j                        AK
           k                         2
           l                         B
           m                         C
           n                         D
           o                         E
           p                         F
           q                         G
           r                         H
           s                         I
           t                         J
           u                         K
           v                         L
           w                         M
           x                         N
           y                         O
           z                         P
           0                         Q
           1                         R
           2                         S

6p5n-pdb-bundle3.pdb:
           A                         T
           B                         U
           C                         V
           D                         W
           E                         X
           F                         Y
           G                         Z
           H                         a
           I                         b
           J                         c
           K                         d
           L                         e
           M                         f
           N                         g
           O                         h
           P                        Aq
           Q                         1
