    New chain ID            Original chain ID

9v27-pdb-bundle1.pdb:
           A                        sB
           B                        sC
           C                        sH
           D                        sI
           E                        sJ
           F                        sK
           G                        sa
           H                        sb
           I                        sc
           J                        se
           K                        sf
           L                        sh
           M                        si
           N                        sj
           O                        sk
           P                        sm
           Q                        so
           R                        sp
           S                        sr
           T                        sx
           U                        sy
           V                        sz
