    New chain ID            Original chain ID

4v62-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AH
           H                        AI
           I                        AJ
           J                        AK
           K                        AL
           L                        AM
           M                        AO
           N                        AT
           O                        AU
           P                        AV
           Q                        Ay
           R                        AX
           S                        AY
           T                        AZ
           U                        BA
           V                        BB
           W                        BC
           X                        BD
           Y                        BE
           Z                        BF
           a                        BH
           b                        BI
           c                        BJ
           d                        BK
           e                        BL
           f                        BM
           g                        BO
           h                        BT
           i                        BU
           j                        BV
           k                        By
           l                        BX
           m                        BY
           n                        BZ
