    New chain ID            Original chain ID

9n2b-pdb-bundle1.pdb:
           A                        16
           B                        SB
           C                        SC
           D                        SD
           E                        SE
           F                        SF
           G                        SG
           H                        SH
           I                        SI
           J                        SJ
           K                        SK
           L                        SL
           M                        SM
           N                        SN
           O                        SO
           P                        SP
           Q                        SQ
           R                        SR
           S                        SS
           T                        ST
           U                        SU
           V                        mR

9n2b-pdb-bundle2.pdb:
           A                        23
           B                         5
           C                        LB
           D                        LC
           E                        LD
           F                        LE
           G                        LF
           H                        LI
           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                        LY
           V                        La
           W                        Lb
           X                        Lc
           Y                        Ld
           Z                        Le
           a                        Lf
           b                        Lg
           c                        Lh
           d                        Li
           e                        Lj
           f                        Pt
