    New chain ID            Original chain ID

5myj-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AI
           J                        AJ
           K                        AK
           L                        AL
           M                        AM
           N                        AN
           O                        AO
           P                        AP
           Q                        AQ
           R                        AR
           S                        AS
           T                        AT
           U                        AU
           V                        B0
           W                        B1
           X                        B2
           Y                        B3
           Z                        B4
           a                        B5
           b                        B6
           c                        B7
           d                        B8

5myj-pdb-bundle2.pdb:
           A                        BA
           B                        BB
           C                        BD
           D                        BE
           E                        BF
           F                        BG
           G                        BH
           H                        BM
           I                        BN
           J                        BO
           K                        BP
           L                        BQ
           M                        BR
           N                        BS
           O                        BT
           P                        BU
           Q                        BV
           R                        BW
           S                        BX
           T                        BZ
           U                         A
