    New chain ID            Original chain ID

7ymm-pdb-bundle1.pdb:
           A                        1A
           B                        1B
           C                        1C
           D                        1D
           E                        1E
           F                        1F
           G                        1H
           H                        1I
           I                        1K
           J                        1L
           K                        1M
           L                        1T
           M                        1X
           N                        1Y
           O                        1Z
           P                        12
           Q                        1G
           R                        11
           S                        13
           T                        14
           U                        2A
           V                        2B
           W                        2C
           X                        2D
           Y                        2E
           Z                        2F
           a                        2H
           b                        2I
           c                        2K
           d                        2L
           e                        2M
           f                        2T
           g                        2X
           h                        2Y
           i                        2Z
           j                        22
           k                        2G
           l                        21
           m                        23
           n                        24
           o                        3A
           p                        3B
           q                        3C
           r                        3D
           s                        3E
           t                        3F
           u                        3H
           v                        3I
           w                        3K
           x                        3L
           y                        3M
           z                        3T
           0                        3X
           1                        3Y
           2                        3Z
           3                        32
           4                        3G
           5                        31
           6                        33

7ymm-pdb-bundle2.pdb:
           A                        34
           B                        4A
           C                        4B
           D                        4C
           E                        4D
           F                        4E
           G                        4F
           H                        4H
           I                        4I
           J                        4K
           K                        4L
           L                        4M
           M                        4T
           N                        4X
           O                        4Y
           P                        4Z
           Q                        42
           R                        4G
           S                        41
           T                        43
           U                        44
