    New chain ID            Original chain ID

4v5t-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AI
           J                        AJ
           K                        AK
           L                        AL
           M                        AM
           N                        AN
           O                        AO
           P                        AP
           Q                        AQ
           R                        AR
           S                        AS
           T                        AT
           U                        BA
           V                        BB
           W                        BC
           X                        BD
           Y                        BE

4v5t-pdb-bundle2.pdb:
           A                        BF
           B                        BG
           C                        BH
           D                        BI
           E                        BJ
           F                        BK
           G                        BL
           H                        BM
           I                        BN
           J                        BO
           K                        BP
           L                        BQ
           M                        BR
           N                        BS
           O                        BT
           P                        CA
           Q                        CB
           R                        CC
           S                        CD
           T                        CE
           U                        CF
           V                        CG
           W                        CH
           X                        CI
           Y                        CJ

4v5t-pdb-bundle3.pdb:
           A                        CK
           B                        CL
           C                        CM
           D                        CN
           E                        CO
           F                        CP
           G                        CQ
           H                        CR
           I                        CS
           J                        CT
