    New chain ID            Original chain ID

9ygc-pdb-bundle1.pdb:
           I                         I
           A                         A
           J                         J
           F                         F
           G                         G
           B                         B
           H                         H
           R                         R
           C                         C
           T                         T
           L                         L
           N                         N
           E                         E
           P                         P
           S                         S
           D                         D
           U                         U
           M                         M
           O                         O
           K                         K
           Q                         Q
