    New chain ID            Original chain ID

6ydp-pdb-bundle1.pdb:
           A                        B0
           B                        BU
           C                        BV
           D                        BW
           E                        BX
           F                        BY
           G                        Ba
           H                        Bb
           I                        Bc
           J                        Bd
           K                        Be
           L                        Bf
           M                        Bg
           N                        Bh
           O                        Bi
           P                        Bj
           Q                        Bk
           R                        Bl
           S                        Bm
           T                        Bn
           U                        Bo
           V                        Bp
           W                        Bq
           X                        Bt
           Y                        Bu
           Z                        Bv
           a                        Bw
           b                        B1
           c                        Bx
           d                        AA
           e                        AB
           f                        AC
           g                        AE
           h                        AF
           i                        AG
           j                        AI
           k                        AJ
           l                        AK
           m                        AL
           n                        AN
           o                        AO
           p                        AP
           q                        AQ
           r                        AR
           s                        AU
           t                        AV
           u                        AX
           v                        AZ
           w                        Aa
           x                        Ab
           y                        Ac
           z                        Ad
           0                        Ae
           1                        Af
           2                        B2
           3                        Ag
           4                        Ah

6ydp-pdb-bundle2.pdb:
           A                        Ai
           B                        Aj
           C                        Ak
           D                        Am
           E                        An
           F                        Ao
           G                        Ap
           H                        CL
           I                        DL
           J                        EL
           K                        FL
           L                        GL
           M                        HL
           N                        LL
           O                        B3
           P                        B4
           Q                        B5
           R                        B6
           S                        B7
           T                        B8
           U                        B9
           V                        BA
           W                        BB
           X                        BC
           Y                        BD
           Z                        BE
           a                        BF
           b                        BI
           c                        BJ
           d                        BK
           e                        BN
           f                        BO
           g                        BP
           h                        BQ
           i                        BR
           j                        BS
           k                        BT
