    New chain ID            Original chain ID

8bip-pdb-bundle1.pdb:
           A                        C4
           B                        C3
           C                        LA
           D                        LB
           E                        LC
           F                        LD
           G                        LE
           H                        LF
           I                        LG
           J                        LH
           K                        LI
           L                        LJ
           M                        LL
           N                        LM
           O                        LN
           P                        LO
           Q                        LP
           R                        LQ
           S                        LR
           T                        LS
           U                        LT
           V                        LU
           W                        LV
           X                        LW
           Y                        LX
           Z                        LY
           a                        LZ
           b                        La
           c                        Lb
           d                        Lc
           e                        Ld
           f                        Le
           g                        Lf
           h                        Lg
           i                        Lh
           j                        Li
           k                        Lj
           l                        Lk
           m                        Ll
           n                        Lm
           o                        Ln
           p                        Lo
           q                        Lp

8bip-pdb-bundle2.pdb:
           1                         1
           A                         A
           B                         B
           8                         8
