    New chain ID            Original chain ID

9ss6-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AI
           J                        AJ
           K                        AK
           L                        AL
           M                        AM
           N                        AN
           O                        AO
           P                        AP
           Q                        AQ
           R                        AR
           S                        AS
           T                        AT
           U                        B0
           V                        B1
           W                        B2
           X                        B3
           Y                        B4
           Z                        B5
           a                        B6
           b                        B7
           c                        B8
           d                        B9
           e                        BA
           f                        BB
           g                        BC
           h                        BD
           i                        BE
           j                        BF
           k                        BG
           l                        BI
           m                        BK
           n                        BM
           o                        BN
           p                        BO
           q                        BP
           r                        BQ
           s                        BR
           t                        BS
           u                        BT
           v                        BU
           w                        BV
           x                        BW
           y                        BX
           z                        BY
           0                        D1

9ss6-pdb-bundle2.pdb:
           A                        D2
           B                        D3
