    New chain ID            Original chain ID

9t6d-pdb-bundle1.pdb:
           A                        CB
           B                        CC
           C                        CD
           D                        L5
           E                        L7
           F                        L8
           G                        LA

9t6d-pdb-bundle2.pdb:
           A                        LB
           B                        LC
           C                        LD
           D                        LE
           E                        LF
           F                        LG
           G                        LH
           H                        LI
           I                        LJ
           J                        LL
           K                        LM
           L                        LN
           M                        LO
           N                        LP
           O                        LQ
           P                        LR
           Q                        LS
           R                        LT
           S                        LU
           T                        LV
           U                        LW
           V                        LX
           W                        LY
           X                        LZ
           Y                        La
           Z                        Lb
           a                        Lc
           b                        Ld
           c                        Le
           d                        Lf
           e                        Lg
           f                        Lh
           g                        Li
           h                        Lj
           i                        Lk
           j                        Ll
           k                        Lm
           l                        Ln
           m                        Lo
           n                        Lp
           o                        Lr
           p                        Lz
           q                        N4
           r                        NA
           s                        NB
           t                        S2
           u                        SA
           v                        SB
           w                        SC

9t6d-pdb-bundle3.pdb:
           A                        SD
           B                        SE
           C                        SF
           D                        SG
           E                        SH
           F                        SI
           G                        SJ
           H                        SK
           I                        SL
           J                        SM
           K                        SN
           L                        SO
           M                        SP
           N                        SQ
           O                        SR
           P                        SS
           Q                        ST
           R                        SU
           S                        SV
           T                        SW
           U                        SX
           V                        SY
           W                        SZ
           X                        Sa
           Y                        Sb
           Z                        Sc
           a                        Sd
           b                        Se
           c                        Sf
           d                        Sg
