    New chain ID            Original chain ID

9r9h_1-pdb-bundle1.pdb:
           A                         T
           B                         U
           C                         V
           D                         W
           E                         X
           F                         Y
           G                         Z
           H                         a
           I                         b
           J                         c
           K                         d
           L                         e
           M                         f
9r9h_1-pdb-bundle2.pdb:
           A                         f
           B                         g
           C                         h
           D                         i
           E                         j
           F                         k
           G                         B
           H                         C
           I                         D
           J                         E
           K                         F
           L                         G
           M                         H
           N                         I
           O                         J
           P                         K
           Q                         L
           R                         M
           S                         N
           T                         O
           U                         P
           V                         Q
           W                         R
           X                         S
