    New chain ID            Original chain ID

4wzj-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         F
           F                         E
           G                         G
           H                         H
           I                         I
           J                         J
           K                         K
           L                         M
           M                         L
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         T
           T                         S
           U                         U
           V                        AA
           W                        BB
           X                        CC
           Y                        DD
           Z                        FF
           a                        EE
           b                        GG
           c                        HH
           d                        II
           e                        JJ
           f                        KK
           g                        MM
           h                        LL
           i                        NN
           j                        OO
           k                        PP
           l                        QQ
           m                        RR
           n                        TT
           o                        SS
           p                        UU
           q                       AAA
           r                       BBB
           s                       CCC
           t                       DDD
           u                       FFF
           v                       EEE
           w                       GGG
           x                       HHH
           y                       III
           z                       JJJ
           0                       KKK
           1                       MMM
           2                       LLL
           3                       NNN
           4                       OOO
           5                       PPP
           6                       QQQ
           7                       RRR
           8                       TTT
           9                       SSS

4wzj-pdb-bundle2.pdb:
           A                       UUU
           B                      AAAA
           C                      BBBB
           D                      CCCC
           E                      DDDD
           F                      FFFF
           G                      EEEE
           H                      GGGG
           I                      HHHH
           J                      IIII
           K                      JJJJ
           L                      KKKK
           M                      MMMM
           N                      LLLL
           O                      NNNN
           P                      OOOO
           Q                      PPPP
           R                      QQQQ
           S                      RRRR
           T                      TTTT
           U                      SSSS
           V                      UUUU
           W                         V
           X                         X
           Y                         Y
           Z                        VV
           a                        XX
           b                        YY
           c                       VVV
           d                       XXX
           e                       YYY
           f                      VVVV
           g                      XXXX
           h                      YYYY
