    New chain ID            Original chain ID

6zna-pdb-bundle1.pdb:
           A                        A8
           B                        AK
           C                        AL
           D                        AM
           E                        AN
           F                        AO
           G                        AP
           H                        AQ
           I                        AR
           J                        Aa
           K                        Ab
           L                        Ad
           M                        Ae
           N                        Af
           O                        Ag
           P                        Aj
           Q                        Ak
           R                        B8
           S                        BK
           T                        BL
           U                        BM
           V                        BN
           W                        BO
           X                        BP
           Y                        BQ
           Z                        BR
           a                        Ba
           b                        Bb
           c                        Bd
           d                        Be
           e                        Bf
           f                        Bg
           g                        Bj
           h                        Bk
           i                        C8
           j                        CK
           k                        CL
           l                        CM
           m                        CN
           n                        CO
           o                        CP
           p                        CQ
           q                        CR
           r                        Ca
           s                        Cb
           t                        Cd
           u                        Ce
           v                        Cf
           w                        Cg
           x                        Cj
           y                        Ck
           z                         K
           0                         L
           1                         M
           2                         N
           3                         O
           4                         P
           5                         Q
           6                         R
           7                         a
           8                         b
           9                         d

6zna-pdb-bundle2.pdb:
           e                         e
           f                         f
           g                         g
           8                         8
           j                         j
           k                         k
