    New chain ID            Original chain ID

3jc1-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
           8                        Ci
           9                        Cj

3jc1-pdb-bundle2.pdb:
           A                        Ck
           B                        Cl
           C                        Cm
           D                        Cn
           E                        Co
           F                        Cp
