    New chain ID            Original chain ID

9kn6-pdb-bundle1.pdb:
           A                        1A
           B                        5B
           C                        SA
           D                        SB
           E                        SC
           F                        SD
           G                        SE
           H                        SF
           I                        SG
           J                        SH
           K                        SI
           L                        SJ
           M                        SK
           N                        SL
           O                        Sf
           P                        SN
           Q                        SO
           R                        SP
           S                        SQ
           T                        SR
           U                        SS
           V                        ST
           W                        SU
           X                        SV
           Y                        SW
           Z                        SX
           a                        SY
           b                        SZ
           c                        Sa
           d                        Sb
           e                        Sc
           f                        Sd
           g                        Se
           h                        sh
           i                        Sg
           j                        zy
           k                        Ln
           l                        zz
           m                        S2
           n                        3m
           o                        3f
           p                        3a

9kn6-pdb-bundle2.pdb:
           A                        3e
           B                        3c
           C                        3h
           D                        3d
           E                        3k
           F                        3l
