    New chain ID            Original chain ID

7f5s-pdb-bundle1.pdb:
           A                        LA
           B                        LB
           C                        L5
           D                        L7
           E                        L8
           F                        LC
           G                        LD
           H                        LE
           I                        LF

7f5s-pdb-bundle2.pdb:
           A                        LG
           B                        LH
           C                        LI
           D                        LJ
           E                        LL
           F                        LM
           G                        LN
           H                        LO
           I                        LP
           J                        LQ
           K                        LR
           L                        LS
           M                        LT
           N                        LU
           O                        LV
           P                        LW
           Q                        LX
           R                        LY
           S                        LZ
           T                        La
           U                        Lb
           V                        Lc
           W                        Ld
           X                        Le
           Y                        Lf
           Z                        Lg
           a                        Lh
           b                        Li
           c                        Lj
           d                        Lk
           e                        Ll
           f                        Lm
           g                        Ln
           h                        Lo
           i                        Lp
           j                        Lr
