    New chain ID            Original chain ID

9n72-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

9n72-pdb-bundle2.pdb:
           A                        LY
           B                        LZ
           C                        NA
           D                        NB
           E                        NC
           F                        ND
           G                        NF
           H                        NG
           I                        NH
           J                        NI
           K                        NM
           L                        NN
           M                        NP
           N                        NQ
           O                        NS
           P                        NV
           Q                        OA
           R                        OH
           S                        OU
           T                        SA
           U                        SB
           V                        SC
           W                        SD
           X                        SE
           Y                        SF
           Z                        SG
           a                        SH
           b                        SI
           c                        SJ
           d                        SK
           e                        SL
           f                        SM
           g                        SP
           h                        SQ
           i                        SR
           j                        SS
           k                        ST
           l                        SU
           m                        SW
           n                        SY
           o                        SZ
