    New chain ID            Original chain ID

8fku-pdb-bundle1.pdb:
           A                        BA
           B                        BB
           C                        L1
           D                        L2
           E                        L3
           F                        L6
           G                        L7
           H                        L8
           I                        L9
           J                        LA
           K                        LB
           L                        LC
           M                        LE
           N                        LG
           O                        LH
           P                        LI
           Q                        LK
           R                        LL
           S                        LN
           T                        LQ
           U                        LS
           V                        LT
           W                        LU
           X                        LW
           Y                        NB
           Z                        NF
           a                        NH
           b                        NI
           c                        NK
           d                        SA
           e                        SC
           f                        SD
           g                        SE
           h                        SG
           i                        SH
           j                        SI
           k                        SJ
           l                        SK

8fku-pdb-bundle2.pdb:
           A                        SL
           B                        SM
           C                        SN
           D                        SO
           E                        SQ
           F                        SR
           G                        SS
           H                        ST
           I                        SV
           J                        SW
           K                        SY
           L                        SZ
