    New chain ID            Original chain ID

6v3e-pdb-bundle1.pdb:
           A                       sN1
           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
