    New chain ID            Original chain ID

6yfa-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                        AU
           V                        AV
           W                        AW
           X                        AX
           Y                        AY
           Z                        AZ
           a                        BA
           b                        BB
           c                        BC
           d                        BD
           e                        BE
           f                        BF
           g                        BG
           h                        BH
           i                        BI
           j                        BJ
           k                        BK
           l                        BL
           m                        BM
           n                        BN
           o                        BO
           p                        BP
           q                        BQ
           r                        BR
           s                        BS
           t                        BT
           u                        BU
           v                        BV
           w                        BW
           x                        BX
           y                        BY
           z                        BZ
           0                        CA
           1                        CB
           2                        CC
           3                        CD
           4                        CE
           5                        CF
           6                        CG
           7                        CH
