    New chain ID            Original chain ID

8gxq-pdb-bundle1.pdb:
           A                         X
           B                         Y
           C                        BA
           D                        DA
           E                        EA
           F                        FA
           G                        HA
           H                        NA
           I                        PA
           J                        DB
           K                        EB
           L                        FB
           M                        HB
           N                        NB
           O                        PB
           P                        HC
           Q                        PC
           R                        PE
           S                        PF
           T                        PH
           U                        PI
           V                        PJ
           W                        PK
           X                        PL
           Y                        DP
           Z                        DQ
           a                        DO
           b                        Dc
           c                        Dd
           d                        De
           e                        Df
           f                        Di
           g                        Dj
           h                        Dk
           i                        Dl
           j                        DD
           k                        Dm
           l                        DE
           m                        DF
           n                        DG
           o                        DH
           p                        DI
           q                        DJ
           r                        DL
           s                        HD
           t                        HE

8gxq-pdb-bundle2.pdb:
           A                        HG
           B                        HH
           C                        HF
           D                        HI
           E                        HJ
           F                        PD
           G                        PG
           H                         g
           I                         j
           J                         n
           K                         s
           L                         u
           M                         a
           N                         d
           O                         f
           P                         i
           Q                         m
           R                         q
           S                         z
           T                         b
           U                         c
           V                         e
           W                         l
           X                         o
           Y                         h
           Z                         k
           a                         r
           b                         t
           c                         v
           d                         p
           e                         w
           f                         x
           g                         y
           h                        NE
           i                        NF
           j                        NG
           k                        NC
           l                        ND
           m                        NH
           n                        NX
           o                        NY
