    New chain ID            Original chain ID

9rbq-pdb-bundle1.pdb:
           A                         A
           D                         D
           E                         E
           F                         F
           G                         G
           H                         H
           I                         I
           J                         J
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           B                         B
           R                         R
           V                         V
           Z                         Z
           c                         c
           g                         g
           j                         j
           n                         n
           q                         q
