    New chain ID            Original chain ID

7zjx-pdb-bundle1.pdb:
           A                         B
           B                         I
           C                        L5
           D                        L7
           E                        L8
           F                        LD
           G                        LE
           H                        LF

7zjx-pdb-bundle2.pdb:
           A                        LG
           B                        LH
           C                        LI
           D                        LJ
           E                        LK
           F                        LL
           G                        LM
           H                        LO
           I                        LP
           J                        LQ
           K                        LR
           L                        LS
           M                        LT
           N                        LU
           O                        LV
           P                        LW
           Q                        LX
           R                        LY
           S                        LZ
           T                        La
           U                        Lb
           V                        Lc
           W                        Ld
           X                        Le
           Y                        Lf
           Z                        Lg
           a                        Lh
           b                        Li
           c                        Lj
           d                        Lk
           e                        Ll
           f                        Lm
           g                        Ln
           h                        Lo
           i                        Lp
           j                        Lq
           k                        Lr
           l                        Ls
           m                        Lx
           n                         S
           o                        S2
           p                        SB
           q                        SC
           r                        SD
           s                        SE
           t                        SF
           u                        SG
           v                        SH
           w                        SL
           x                        SM
           y                        SN
           z                        SO
           0                        SP

7zjx-pdb-bundle3.pdb:
           A                        SQ
           B                        SR
           C                        SS
           D                        ST
           E                        SU
           F                        SV
           G                        SW
           H                        SX
           I                        SY
           J                        SZ
           K                        Sa
           L                        Sb
           M                        Sc
           N                        Sd
           O                        Se
           P                        Sf
           Q                        Sg
           R                        Sh
           S                        Si
           T                        Sj
           U                        Sk
           V                        Sl
