    New chain ID            Original chain ID

8flb-pdb-bundle1.pdb:
           A                        BA
           B                        L1
           C                        L3
           D                        L4
           E                        L5
           F                        L6
           G                        L7
           H                        L8
           I                        L9
           J                        LA
           K                        LB
           L                        LC
           M                        LD
           N                        LE
           O                        LF
           P                        LG
           Q                        LH
           R                        LI
           S                        LJ

8flb-pdb-bundle2.pdb:
           A                        LK
           B                        LL
           C                        LM
           D                        LN
           E                        LO
           F                        LP
           G                        LQ
           H                        LR
           I                        LS
           J                        LT
           K                        LU
           L                        LV
           M                        LW
           N                        LX
           O                        LY
           P                        LZ
           Q                        NK
           R                        NL
           S                        NP
           T                        NR
           U                        SA
           V                        SB
           W                        SC
           X                        SD
           Y                        SE
           Z                        SF
           a                        SG
           b                        SH
           c                        SI
           d                        SK
           e                        SM
           f                        SQ
           g                        SR
           h                        SV
           i                        VB
