    New chain ID            Original chain ID

8tva-pdb-bundle1.pdb:
           A                         b
           B                        BK
           C                        BL
           D                        BM
           E                        BN
           F                        BO
           G                        BP
           H                        BQ
           I                        BR
           J                        BS
           K                        BT
           L                        BU
           M                        BV
           N                        BW
           O                        BX
           P                        BY
           Q                        BZ
           R                        CA
           S                        CB
           T                        CC
           U                        CD
           V                        CE
           W                        CF
           X                        CG
           Y                        CH
           Z                        CI
           a                        CJ
           b                        CK
           c                        CL
           d                        CM
           e                        CN
           f                        CO
           g                        CP
           h                        CQ
           i                        CR
           j                        CS
           k                        CT
           l                        CU
           m                        CV
           n                        CW
           o                        CX
