    New chain ID            Original chain ID

7nrc-pdb-bundle1.pdb:
           A                        S2
           B                        Sl
           C                        SP
           D                        SQ
           E                        SE
           F                        SR
           G                        SA
           H                        SS
           I                        SB
           J                        ST
           K                        SU
           L                        SV
           M                        SW
           N                        SC
           O                        SX
           P                        SD
           Q                        SY
           R                        SZ
           S                        SF
           T                        SG
           U                        SH
           V                        SI
           W                        SJ
           X                        Sa
           Y                        Sb
           Z                        Sc
           a                        Sd
           b                        SK
           c                        Se
           d                        Sf
           e                        SM
           f                        Sg
           g                        SN
           h                        SO
           i                        SL
           j                        Sm
           k                        Sn
           l                        So
           m                        Sp

7nrc-pdb-bundle2.pdb:
           A                        LA
           B                        LB
           C                        LC
           D                        LD
           E                        LE
           F                        LF
           G                        LG
           H                        LH
           I                        LI
           J                        LJ
           K                        LK
           L                        LL
           M                        LM
           N                        LN
           O                        LO
           P                        LP
           Q                        LQ

7nrc-pdb-bundle3.pdb:
           A                        LR
           B                        LS
           C                        LT
           D                        LU
           E                        LV
           F                        LW
           G                        LX
           H                        LY
           I                        LZ
           J                        La
           K                        Lb
           L                        Lc
           M                        Ld
           N                        Le
           O                        Lf
           P                        Lg
           Q                        Lh
           R                        Li
           S                        Lj
           T                        Lk
           U                        Ll
           V                        Lm
           W                        Ln
           X                        Lo
           Y                        Lp
           Z                        Lq
           a                        Lr
           b                        Ls
           c                        Lt
           d                         A
