    New chain ID            Original chain ID

9mbq_1-pdb-bundle1.pdb:
           A                         U
           B                         V
           C                         W
           D                         X
           E                         Y
           F                         Z
           G                         a
           H                         b
           I                         c
           J                         d
           K                         e
           L                         A
           M                         B
           N                         C
           O                         D
           P                         E
           Q                         F
           R                         G
           S                         H
           T                         I
           U                         J
           V                         K
           W                         L
           X                         M
           Y                         N
           Z                         O
           a                         P
           b                         Q
           c                         R
           d                         S
           e                         T
           f                         g
           g                         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                         f
           u                         x
9mbq_1-pdb-bundle2.pdb:
           A                         x
