    New chain ID            Original chain ID

9xk3-pdb-bundle1.pdb:
           A                        1A
           B                        1B
           C                        1C
           D                        1D
           E                        1E
           F                        1F
           G                        1H
           H                        1I
           I                        1J
           J                        1K
           K                        1L
           L                        1M
           M                        1O
           N                        1P
           O                        1T
           P                        1U
           Q                        1V
           R                        1W
           S                        1X
           T                        1Y
           U                        1Z
