    New chain ID            Original chain ID

3j7r-pdb-bundle1.pdb:
           5                         5
           7                         7
           8                         8
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F

3j7r-pdb-bundle2.pdb:
           A                         G
           B                         H
           C                         I
           D                         J
           E                         L
           F                         M
           G                         N
           H                         O
           I                         P
           J                         Q
           K                         R
           L                         S
           M                         T
           N                         U
           O                         V
           P                         W
           Q                         X
           R                         Y
           S                         Z
           T                         a
           U                         b
           V                         c
           W                         d
           X                         e
           Y                         f
           Z                         g
           a                         h
           b                         i
           c                         j
           d                         k
           e                         l
           f                         m
           g                         n
           h                         o
           i                         p
           j                         r
           k                         z
           l                         1
           m                         2
           n                         3
           o                        S2
           p                        SA
           q                        SB
           r                        SC
           s                        SD
           t                        SE
           u                        SF
           v                        SG
           w                        SH
           x                        SI
           y                        SJ
           z                        SK
           0                        SL

3j7r-pdb-bundle3.pdb:
           A                        SM
           B                        SN
           C                        SO
           D                        SP
           E                        SQ
           F                        SR
           G                        SS
           H                        ST
           I                        SU
           J                        SV
           K                        SW
           L                        SX
           M                        SY
           N                        SZ
           O                        Sa
           P                        Sb
           Q                        Sc
           R                        Sd
           S                        Se
           T                        Sf
           U                        Sg
           V                        S4
           W                        S5
           X                        S6
