    New chain ID            Original chain ID

9n74-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

9n74-pdb-bundle2.pdb:
           A                        LQ
           B                        LR
           C                        LS
           D                        LT
           E                        LU
           F                        LW
           G                        LZ
           H                        NA
           I                        NB
           J                        ND
           K                        NF
           L                        NG
           M                        NH
           N                        NI
           O                        NL
           P                        NM
           Q                        NP
           R                        NQ
           S                        NS
           T                        NV
           U                        OA
           V                        OH
           W                        OU
           X                        SA
           Y                        SB
           Z                        SC
           a                        SD
           b                        SE
           c                        SF
           d                        SG
           e                        SH
           f                        SI
           g                        SJ
           h                        SK
           i                        SL
           j                        SM

9n74-pdb-bundle3.pdb:
           A                        SP
           B                        SQ
           C                        SR
           D                        SS
           E                        ST
           F                        SU
           G                        SV
           H                        SW
           I                        SX
           J                        SY
           K                        SZ
