    New chain ID            Original chain ID

9ze3-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         2
           E                         H
           F                         R
           G                        B1
           H                        B2
           I                        B3
           J                        B4
           K                        B5
           L                        B6
           M                        A1
           N                        A2
           O                        A3
