    New chain ID            Original chain ID

5wyk-pdb-bundle1.pdb:
           A                        3A
           B                        3B
           C                        3C
           D                        3D
           E                        3E
           F                        3F
           G                        3G
           H                        3H
           I                        5A
           J                        AA
           K                        AB
           L                        AC
           M                        AD
           N                        AE
           O                        AF
           P                        AG
           Q                        B1
           R                        BA
           S                        BB
           T                        BC
           U                        BD
           V                        BE
           W                        CA
           X                        CB
           Y                        E1
           Z                        E2
           a                        E4
           b                        K1
           c                        MA
           d                        MB
           e                        MC
           f                        P1
           g                        R1
           h                        S1

5wyk-pdb-bundle2.pdb:
           A                        SA
           B                        SC
           C                        SF
           D                        SG
           E                        SI
           F                        SJ
           G                        SK
           H                        SM
           I                        SO
           J                        SP
           K                        SR
           L                        SX
           M                        SY
           N                        SZ
           O                        Sc
           P                        Sd
           Q                        Sf
           R                        U1
           S                        U2
           T                        U4
           U                        U5
           V                        UA
           W                        UB
           X                        UC
