    New chain ID            Original chain ID

8fl2-pdb-bundle1.pdb:
           A                        BA
           B                        BB
           C                        BD
           D                        L1
           E                        L2
           F                        L3
           G                        L4
           H                        L5
           I                        L6
           J                        L7
           K                        L8
           L                        L9
           M                        LA
           N                        LB
           O                        LC
           P                        LD
           Q                        LE

8fl2-pdb-bundle2.pdb:
           A                        LF
           B                        LG
           C                        LH
           D                        LI
           E                        LJ
           F                        LK
           G                        LL
           H                        LN
           I                        LO
           J                        LP
           K                        LQ
           L                        LR
           M                        LS
           N                        LT
           O                        LU
           P                        LW
           Q                        LX
           R                        LY
           S                        LZ
           T                        NB
           U                        NC
           V                        NF
           W                        NJ
           X                        NK
           Y                        NL
           Z                        NP
           a                        NT
           b                        NU
           c                        NV
           d                        NW
           e                        NX
           f                        NY
           g                        NZ
           h                        SA
           i                        SB
           j                        SC
           k                        SD
           l                        SE
           m                        SF
           n                        SG
           o                        SH
           p                        SI
           q                        SK
           r                        SL
           s                        SM
           t                        SQ
           u                        SR
           v                        SV
