    New chain ID            Original chain ID

31fy_1-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AE
           D                        AH
           E                        AJ
           F                        AK
           G                        AL
           H                        AM
           I                        AN
           J                        AO
           K                        AP
           L                        AT
           M                        AX
           N                        Ac
           O                        Af
           P                        AD
           Q                        AF
           R                        AG
           S                        AI
           T                        AQ
           U                        AR
           V                        AS
           W                        AU
           X                        AV
           Y                        AW
           Z                        AY
           a                        AZ
           b                        Aa
           c                        Ab
           d                        Ad
           e                        Ag
           f                        Ah
           g                        BA
           h                        BB
           i                        BC
           j                        BD
           k                        BE
31fy_1-pdb-bundle2.pdb:
           A                        BE
           B                        BF
           C                        BG
           D                        BH
           E                        BI
           F                        BJ
           G                        BK
           H                        BL
           I                        BM
           J                        BN
           K                        BO
           L                        BP
           M                        BQ
           N                        BR
           O                        BS
           P                        BT
           Q                        BU
           R                        BV
           S                        BW
           T                        BX
           U                        BY
           V                        BZ
           W                        Ba
           X                        Bb
           Y                        Bc
           Z                        Bd
           a                        Bf
           b                        Bg
           c                        Bh
           d                        CA
           e                        CB
           f                        CC
           g                        CD
           h                        CE
           i                        CF
           j                        CG
           k                        CH
