    New chain ID            Original chain ID

9xcf_1-pdb-bundle1.pdb:
           A                         A
           B                         C
           C                         D
           D                         E
           E                         F
           F                         G
           G                         I
           H                         J
           I                         K
           J                         L
           K                         B
           L                         H
           M                         N
           N                         O
           O                         P
           P                         Q
           Q                         S
           R                         T
           S                         U
           T                         V
9xcf_1-pdb-bundle2.pdb:
           A                         V
           B                         W
           C                         Y
           D                         Z
           E                         a
           F                         b
           G                         f
           H                         i
           I                         o
           J                         p
           K                         q
