    New chain ID            Original chain ID

6awd-pdb-bundle1.pdb:
           A                         A
           B                        01
           C                        02
           D                        03
           E                        04
           F                        05
           G                         E
           H                         F
           I                         G
           J                         H
           K                         I
           L                         J
           M                         K
           N                         L
           O                         M
           P                         N
           Q                         O
           R                         P
           S                         Q
           T                         R
           U                         S
           V                         T
           W                         U
           X                         V
           Y                         W
           Z                         X
