    New chain ID            Original chain ID

9n73-pdb-bundle1.pdb:
           A                        L0
           B                        L1
           C                        L2
           D                        L3
           E                        L4
           F                        L5
           G                        L6
           H                        L7
           I                        L8
           J                        L9
           K                        LC
           L                        LD
           M                        LE
           N                        LF
           O                        LG
           P                        LH
           Q                        LI
           R                        LJ
           S                        LK
           T                        LL
           U                        LM
           V                        LN
           W                        LO
           X                        LP
           Y                        LQ
           Z                        LR
           a                        LS
           b                        LT
           c                        LU
           d                        LV
           e                        LW
           f                        LX

9n73-pdb-bundle2.pdb:
           A                        LY
           B                        LZ
           C                        NA
           D                        NB
           E                        NC
           F                        ND
           G                        NF
           H                        NG
           I                        NH
           J                        NI
           K                        NL
           L                        NM
           M                        NN
           N                        NP
           O                        NQ
           P                        NS
           Q                        NV
           R                        OA
           S                        OH
           T                        OU
           U                        SA
           V                        SB
           W                        SC
           X                        SD
           Y                        SE
           Z                        SF
           a                        SG
           b                        SH
           c                        SI
           d                        SJ
           e                        SK
           f                        SL
           g                        SM
           h                        SP
           i                        SQ
           j                        SR
           k                        SS
           l                        ST
           m                        SU
           n                        SW
           o                        SY
           p                        SZ
