    New chain ID            Original chain ID

9sdp-pdb-bundle1.pdb:
           A                         9
           B                        BA
           C                        BB
           D                        BC
           E                        BE
           F                        BG
           G                        BH
           H                        BI
           I                        BJ
           J                        BL
           K                        BN
           L                        cS
           M                        BV
           N                        BW
           O                        BX
           P                        BY
           Q                        BZ
           R                        Bb
           S                        Be
           T                        Cn
