    New chain ID            Original chain ID

9dyg-pdb-bundle1.pdb:
           A                        CA
           B                         2
           C                         D
           D                         E
           E                         J
           F                         K
           G                         N
           H                         P
           I                         Q
           J                         R
           K                         S
           L                         T
           M                         U
           N                         Y
