    New chain ID            Original chain ID

9v1j-pdb-bundle1.pdb:
           A                        sB
           B                        sC
           C                        sH
           D                        sK
           E                        sa
           F                        sb
           G                        sc
           H                        se
           I                        sf
           J                        sh
           K                        si
           L                        sj
           M                        sk
           N                        sm
           O                        so
           P                        sp
           Q                        sr
           R                        sx
           S                        sy
           T                        sz
