    New chain ID            Original chain ID

8fkp-pdb-bundle1.pdb:
           A                        L1
           B                        L2
           C                        L3
           D                        L6
           E                        L7
           F                        L8
           G                        L9
           H                        LA
           I                        LB
           J                        LC
           K                        LE
           L                        LG
           M                        LH
           N                        LI
           O                        LK
           P                        LN
           Q                        LQ
           R                        LS
           S                        LT
           T                        LU
           U                        LW
           V                        NB
           W                        NE
           X                        NG
           Y                        NM
           Z                        NN
           a                        NO
           b                        NQ
           c                        NS
           d                        SA
           e                        SC
           f                        SD
           g                        SE
           h                        SH
           i                        SI
           j                        SJ
           k                        SK
           l                        SL
           m                        SM
           n                        SN
           o                        SO
           p                        SR
           q                        SS
           r                        ST
           s                        SV

8fkp-pdb-bundle2.pdb:
           A                        SW
           B                        SZ
