    New chain ID            Original chain ID

7am2-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         E
           E                         F
           F                         G
           G                         I
           H                         J
           I                         K
           J                         L
           K                         M
           L                         N
           M                         O
           N                         Q
           O                         R
           P                         S
           Q                         T
           R                         V
           S                         Z
           T                        BA
           U                        CA
           V                        UA
           W                        BB
           X                        CB
           Y                        BK
           Z                        BQ
           a                        BN
           b                        BE
           c                        BO
           d                        At
           e                        Au
           f                        Ae
           g                        Af
           h                        Ah
           i                        Ap
           j                        Al
           k                        Ab
           l                        Aa
           m                        BP
           n                        Az
           o                        Am
           p                        As
           q                        BG
           r                        Ad
           s                        Aw
           t                        BH
           u                        Aj
           v                        Ar
           w                        An
           x                        BF
           y                        Av
           z                        BM
           0                        Ag
           1                        Bl
           2                        Ax
           3                        BS
           4                        BY

7am2-pdb-bundle2.pdb:
           A                        BX
           B                        BZ
           C                        CC
           D                        CD
           E                        BT
           F                        BU
           G                        BW
           H                        BV
           I                        U7
           J                        U6
           K                        U1
           L                        U3
           M                        U4
           N                        U5
           O                        BR
           P                        U2
           Q                         1
           R                        R1
           S                        R2
           T                        R5
           U                        U8
