    New chain ID            Original chain ID

7n2c-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

7n2c-pdb-bundle2.pdb:
           A                        23
           B                         5
           C                        LA
           D                        LB
           E                        LC
           F                        LD
           G                        LE
           H                        LF
           I                        LG
           J                        LI
           K                        LJ
           L                        LK
           M                        LM
           N                        LN
           O                        LO
           P                        LP
           Q                        LQ
           R                        LR
           S                        LS
           T                        LT
           U                        LU
           V                        LV
           W                        LW
           X                        LX
           Y                        LY
           Z                        La
           a                        Lb
           b                        Lc
           c                        Ld
           d                        Le
           e                        Lf
           f                        Lg
           g                        Lh
           h                        Li
           i                        Lj
           j                        EF
           k                        Pp

7n2c-pdb-bundle3.pdb:
           A                        Pt
           B                        Dt
