    New chain ID            Original chain ID

8fl4-pdb-bundle1.pdb:
           A                        BA
           B                        BB
           C                        BD
           D                        L1
           E                        L3
           F                        L4
           G                        L5
           H                        L6
           I                        L7
           J                        L8
           K                        L9
           L                        LA
           M                        LB
           N                        LC
           O                        LD
           P                        LE
           Q                        LF
           R                        LG

8fl4-pdb-bundle2.pdb:
           A                        LH
           B                        LI
           C                        LJ
           D                        LK
           E                        LL
           F                        LN
           G                        LO
           H                        LP
           I                        LQ
           J                        LR
           K                        LS
           L                        LT
           M                        LU
           N                        LW
           O                        LX
           P                        LY
           Q                        LZ
           R                        NB
           S                        NC
           T                        NF
           U                        NJ
           V                        NK
           W                        NL
           X                        NP
           Y                        NT
           Z                        NU
           a                        NV
           b                        NW
           c                        NX
           d                        NY
           e                        NZ
           f                        SA
           g                        SB
           h                        SC
           i                        SD
           j                        SE
           k                        SF
           l                        SG
           m                        SI
           n                        SK
           o                        SM
           p                        SQ
           q                        SR
           r                        SV
