    New chain ID            Original chain ID

6ht7-pdb-bundle1.pdb:
           J                         J
           X                         X
           W                         W
           V                         V
           2                         2
           1                         1
           Z                         Z
           Y                         Y
           I                         I
           H                         H
           N                         N
           M                         M
           L                         L
           K                         K
           G                         G
           U                         U
           T                         T
           S                         S
           R                         R
           Q                         Q
           P                         P
           O                         O
           F                         F

6ht7-pdb-bundle2.pdb:
           E                         E
           D                         D
           C                         C
           B                         B
           A                         A
