    New chain ID            Original chain ID

9fkb-pdb-bundle1.pdb:
           A                        PT
           B                        PM
           C                        PN
           D                        PO
           E                        PP
           F                        PQ
           G                        PR
           H                        PS
           I                        PU
           J                        PV
           K                        PW
           L                        PX
           M                        Pa
           N                        Pb
           O                        Pc
           P                        Pd
           Q                        Pe
           R                        Pf
           S                        B1
           T                        B2
           U                        B3
           V                        B4
           W                        B5
           X                        B6
           Y                        AM
           Z                        AN
           a                        AO
           b                        AP
           c                        AQ
           d                        AR
           e                        SB
           f                        SA
           g                        SC
           h                        SD
           i                        SE
           j                        SF
           k                        SG
           l                        SH
           m                        SI
           n                        SJ
           o                        SK
           p                        SL
           q                        SM
           r                        SN
           s                        SO
           t                        SP
           u                        SQ
           v                        SR
           w                        SS
           x                        ST
           y                        SU
           z                        SV
           0                        SW
           1                        SX
           2                        SY
           3                        SZ
           4                        Sa
           5                        Sb
           6                        Sc
           7                        Sd
           8                        Se
           9                        Sf

9fkb-pdb-bundle2.pdb:
           A                        Sg
           B                        Sh
           C                        Si
           D                        Sj
           E                        Sk
           F                        Sl
           G                        Sm
           H                        Sn
           I                        So
           J                        Sp
           K                        Sq
           L                        Sr
           M                        Ss
           N                        St
           O                        Su
           P                        Sv
           Q                        Sw
           R                        Sx
           S                        Sy
           T                        Sz
           U                        S1
           V                        S2
           W                        BA
           X                        BB
           Y                        BC
