    New chain ID            Original chain ID

6n4v-pdb-bundle1.pdb:
           A                        Af
           B                         A
           C                         B
           D                         C
           E                         D
           F                         E
           G                         F
           H                         G
           I                         H
           J                         I
           K                         J
           L                         K
           M                         L
           N                         M
           O                         N
           P                         O
           Q                         P
           R                         Q
           S                         R
           T                         S
           U                         T
           V                         V
           W                         W
           X                         X
           Y                         Y
           Z                         Z
           a                        AA
           b                        BA
           c                        CA
           d                        DA
           e                        EA
           f                        FA
           g                        GA
           h                        HA
           i                        IA
           j                        JA
           k                        KA
           l                        LA
           m                        MA
           n                        NA
           o                        OA
           p                        PA
           q                        QA
           r                        RA
           s                        SA
           t                        TA
           u                        UA
           v                        VA
           w                        WA
           x                        XA

6n4v-pdb-bundle2.pdb:
           A                        YA
           B                        ZA
           C                        AB
           D                        BB
           E                        CB
           F                        DB
           G                        EB
           H                        FB
           I                        GB
           J                        HB
           K                        IB
           L                        JB
           M                        KB
           N                        LB
           O                        MB
           P                        NB
           Q                        OB
           R                        PB
           S                        QB
           T                        RB
           U                        SB
           V                        TB
           W                        UB
           X                        VB
           Y                        WB
           Z                        XB
           a                        YB
           b                        ZB
           c                        AC
           d                        BC
           e                        CC
           f                        DC
           g                        EC
           h                        FC
           i                        GC
           j                        HC
           k                        IC
           l                        JC
           m                        KC
           n                        LC
           o                        MC
           p                        NC
           q                        OC
           r                        PC
           s                        QC
           t                        RC
           u                        SC
           v                        TC
           w                        UC
           x                        VC

6n4v-pdb-bundle3.pdb:
           A                        WC
           B                        XC
           C                        YC
           D                        ZC
           E                        AD
           F                        BD
           G                        CD
           H                        DD
           I                        ED
           J                        FD
           K                        GD
           L                        HD
           M                        ID
           N                        JD
           O                        KD
           P                        LD
           Q                        MD
           R                        ND
           S                        OD
           T                        PD
