    New chain ID            Original chain ID

7nsh-pdb-bundle1.pdb:
           A                        B0
           B                        BY
           C                        Ba
           D                        B8
           E                        Bb
           F                        Bc
           G                        Bd
           H                        Be
           I                        Bf
           J                        Bg
           K                        Bh
           L                        Bi
           M                        Bj
           N                        Bk
           O                        Bl
           P                        Bm
           Q                        Bn
           R                        Bo
           S                        Bp
           T                        Bq
           U                        Bt
           V                        Bu
           W                        Bv
           X                        Bw
           Y                        Bx
           Z                        CL
           a                        B1
           b                        DL
           c                        EL
           d                        FL
           e                        B9
           f                        GL
           g                        HL
           h                        BA
           i                        B2
           j                        B3
           k                        B4
           l                        B5
           m                        B6
           n                        B7
           o                        BB
           p                        BC
           q                        BD
           r                        BG
           s                        BQ
           t                        LL
           u                        BE
           v                        BF
           w                        BI
           x                        BJ
           y                        BK

7nsh-pdb-bundle2.pdb:
           A                        BN
           B                        BO
           C                        BP
           D                        BR
           E                        BS
           F                        BT
           G                        BU
           H                        BV
           I                        BW
           J                        BX
