    New chain ID            Original chain ID

3j9m-pdb-bundle1.pdb:
           A                         A
           B                         B
           D                         D
           E                         E
           F                         F
           H                         H
           I                         I
           J                         J
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         S
           T                         T
           U                         U
           V                         V
           W                         W
           X                         X
           Y                         Y
           Z                         Z
           0                         0
           1                         1
           2                         2
           3                         3
           4                         4
           5                         5
           6                         6
           7                         7
           8                         8
           9                         9
           a                         a
           b                         b
           c                         c
           d                         d
           e                         e
           f                         f
           g                         g
           h                         h
           i                         i
           j                         j
           k                         k
           l                         l
           m                         m
           o                         o
           p                         p
           q                         q
           r                         r
           s                         s
           t                         t
           u                         u

3j9m-pdb-bundle2.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AI
           J                        AJ
           K                        AK
           L                        AL
           M                        AM
           N                        AN
           O                        AO
           P                        AP
           Q                        AQ
           R                        AR
           S                        AS
           T                        AT
           U                        AU
           V                        AV
           W                        AW
           X                        AX
           Y                        AY
           Z                        AZ
           a                        A0
           b                        A1
           c                        A2
           d                        A3
           e                        A4
