    New chain ID            Original chain ID

9axw-pdb-bundle1.pdb:
           A                       AA1
           B                       BA1
           C                       CA1
           D                       DA1
           E                       EA1
           F                       FA1
           G                       GA1
           H                       HA1
           I                         I
           J                         J
           K                         K
           L                         L
           M                         N
           N                         O
           O                         P
           P                         M
