    New chain ID            Original chain ID

9u3l_1-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         G
           G                         H
           H                         I
           I                         J
           J                         L
           K                         M
           L                         N
           M                         O
           N                         P
           O                         Q
           P                         R
           Q                         S
           R                         T
           S                         V
           T                         W
           U                         X
           V                         Y
           W                         Z
           X                         a
           Y                         b
           Z                         c
           a                         d
           b                         g
           c                         h
           d                         i
           e                         j
           f                         l
           g                         m
           h                         n
           i                         o
           j                         p
           k                         q
           l                         r
           m                         s
           n                         t
           o                         u
           p                         U
           q                         e
           r                         F
9u3l_1-pdb-bundle2.pdb:
           A                         F
           B                         K
           C                         k
