    New chain ID            Original chain ID

5j7y-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F
           G                         G
           H                         H
           I                         I
           J                         J
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         S
           T                         T
           U                         U
           V                         V
           W                         W
           X                         X
           Y                         Y
           Z                         Z
           a                         a
           b                         b
           c                         c
           d                         d
           e                         e
           f                         f
           g                         g
           h                         h
           i                         i
           j                         j
           k                         k
           l                         0
           m                         1
           n                         2
           o                         3
           p                         4
           q                         5
           r                         6
           s                         7
           t                         8
           u                         9
           v                         z
           w                         y
           x                         x
           y                         w
           z                         v
           0                         u
           1                         t
           2                        AA
           3                        AB
           4                        AC
           5                        AD
           6                        AE
           7                        AF
           8                        AG
           9                        AH

5j7y-pdb-bundle2.pdb:
           A                        AI
           B                        AJ
           C                        AK
           D                        AL
           E                        AM
           F                        AN
           G                        AO
           H                        AP
           I                        AQ
           J                        AR
           K                        AS
           L                        AT
           M                        AU
           N                        AV
           O                        BN
           P                        BO
           Q                        BC
           R                        BD
           S                        BE
           T                        BP
           U                        BG
           V                        BH
           W                        BI
           X                        BJ
           Y                        BK
           Z                        BL
           a                        BM
