    New chain ID            Original chain ID

8i9v-pdb-bundle1.pdb:
           A                        C1
           B                        C2
           C                        C3
           D                        CA
           E                        CB
           F                        CC
           G                        CE
           H                        CF
           I                        CG
           J                        CH
           K                        CI
           L                        CJ
           M                        CK
           N                        CL
           O                        CM
           P                        CN
           Q                        CO
           R                        CP
           S                        CQ
           T                        CR
           U                        CS
           V                        CT
           W                        CU
           X                        CX
           Y                        CY
           Z                        Cz
           a                        Cb

8i9v-pdb-bundle2.pdb:
           A                        LB
           B                        LC
           C                        LE
           D                        LF
           E                        LG
           F                        LH
           G                        LK
           H                        LL
           I                        LM
           J                        LN
           K                        LO
           L                        LP
           M                        LQ
           N                        LS
           O                        LT
           P                        LV
           Q                        LX
           R                        LY
           S                        Ld
           T                        Le
           U                        Lf
           V                        Lh
           W                        Li
           X                        Lj
           Y                        Lq
           Z                        Cc
           a                        Cd
           b                        Ce
           c                        Cf
