    New chain ID            Original chain ID

10sj_1-pdb-bundle1.pdb:
           A                         1
           B                         2
           C                         A
           D                         B
           E                         C
           F                         D
           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
           a                         Y
           b                         Z
           c                        CA
10sj_1-pdb-bundle2.pdb:
           A                        CA
           B                        DA
