    New chain ID            Original chain ID

8gxs-pdb-bundle1.pdb:
           A                         X
           B                         Y
           C                        NX
           D                        NY
           E                        BA
           F                        DA
           G                        EA
           H                        FA
           I                        HA
           J                        NA
           K                        PA
           L                        DB
           M                        EB
           N                        FB
           O                        HB
           P                        NB
           Q                        PB
           R                        HC
           S                        DO
           T                        DP
           U                        DQ
           V                        PC
           W                        PE
           X                        PF
           Y                        PH
           Z                        PI
           a                        PJ
           b                        PK
           c                        PL
           d                        HD
           e                        HG
           f                        HE
           g                        HF
           h                        HH
           i                        DD
           j                        DE
           k                        DF
           l                        DG
           m                        DH
           n                        DI
           o                        DL

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