    New chain ID            Original chain ID

6n06-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                        GA
           E                        GB
           F                        GC
           G                        GD
           H                        GE
           I                        GF
           J                        HA
           K                        HB
           L                        HC
           M                        HD
           N                        HE
           O                        HF
           P                        IA
           Q                        IB
           R                        IC
           S                        ID
           T                        IE
           U                        IF
           V                        JA
           W                        JB
           X                        JC
           Y                        JD
           Z                        JE
           a                        JF
           b                        KA
           c                        KB
           d                        KC
           e                        KD
           f                        KE
           g                        KF
           h                        LA
           i                        LB
           j                        LC
           k                        LD
           l                        LE
           m                        LF
