    New chain ID            Original chain ID

8i9r-pdb-bundle1.pdb:
           A                        C1
           B                        C2
           C                        CA
           D                        CB
           E                        CC
           F                        CE
           G                        CH
           H                        CI
           I                        CJ
           J                        CM
           K                        CN
           L                        CQ
           M                        CR
           N                        CU
           O                        Ch
           P                        LB
           Q                        LC
           R                        LE
           S                        LF
           T                        LG
           U                        LL
           V                        LM
           W                        LN
           X                        LO
           Y                        LP
           Z                        LQ
           a                        LS
           b                        LT
           c                        LV
           d                        LY
           e                        Le
           f                        Lf
           g                        Lh
           h                        Li
           i                        Lj
           j                        Cc

8i9r-pdb-bundle2.pdb:
           A                        Cd
           B                        Ce
           C                        Cf
           D                        Cy
           E                        Cg
           F                        CP
           G                        CG
           H                        Lq
           I                        Cx
           J                        LJ
           K                        LD
           L                        C4
           M                        CX
