    New chain ID            Original chain ID

8k2b-pdb-bundle1.pdb:
           A                        L1
           B                        L2
           C                        LB
           D                        LC
           E                        LD
           F                        LI
           G                        LJ
           H                        LK
           I                        LM
           J                        LN
           K                        LO
           L                        LP
           M                        LQ
           N                        LR
           O                        LS
           P                        LT
           Q                        LU
           R                        LV
           S                        LW
           T                        LX
           U                        La
           V                        Lb
           W                        Lu
           X                        Ld
           Y                        Lf
           Z                        Lg
           a                        Lh
           b                        Li
           c                        Lj
           d                        Lk
           e                        Ll
           f                        Lm
           g                        Ln
           h                        Lo
           i                        Lp
           j                        Lq
           k                        Lr
           l                        Ls
           m                        Lt
           n                        Lv
           o                        Lw
           p                        Lx
           q                        Ly
           r                        Lz
           s                        L3
           t                        L4
           u                        L5
           v                        L6
           w                        L7
           x                        L8
           y                        SR

8k2b-pdb-bundle2.pdb:
           A                        Sf
           B                         u
           C                         v
           D                         w
