    New chain ID            Original chain ID

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

8fks-pdb-bundle2.pdb:
           A                        SR
           B                        SS
           C                        ST
           D                        SV
           E                        SW
           F                        SZ
