    New chain ID            Original chain ID

31ev-pdb-bundle1.pdb:
           A                        AA
           B                         B
           C                        CA
           D                         D
           E                        EA
           F                         F
           G                        GA
           H                         H
           I                        IA
           J                         J
           K                        KA
           L                         L
           M                         N
           N                         P
           O                         R
           P                         T
           Q                         V
           R                         W
           S                         X
           T                         Y
           U                         Z
           V                         a
           W                         b
           X                         c
           Y                         d
           Z                         e
           a                         f
           b                         g
           c                         h
           d                         i
           e                         j
           f                         k
           g                         l
           h                         m
           i                         n
           j                         o
