    New chain ID            Original chain ID

5aj4-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AE
           E                        AF
           F                        AG
           G                        AI
           H                        AJ
           I                        AK
           J                        AL
           K                        AN
           L                        AO
           M                        AP
           N                        AQ
           O                        AR
           P                        AU
           Q                        AV
           R                        AX
           S                        AY
           T                        Aa
           U                        Ab
           V                        Ac
           W                        Ad
           X                        Ae
           Y                        Af
           Z                        Ag
           a                        Ah
           b                        Ai
           c                        Aj
           d                        Ak
           e                        Am
           f                        An
           g                        Ao
           h                        Ap
           i                        As
           j                        Az
           k                        B0
           l                        B1
           m                        B2
           n                        B3
           o                        B4
           p                        B5
           q                        B6
           r                        B7
           s                        B8
           t                        B9

5aj4-pdb-bundle2.pdb:
           A                        BA
           B                        BB
           C                        BD
           D                        BE
           E                        BF
           F                        BI
           G                        BJ
           H                        BK
           I                        BN
           J                        BO
           K                        BP
           L                        BQ
           M                        BR
           N                        BS
           O                        BT
           P                        BU
           Q                        BV
           R                        BW
           S                        BX
           T                        BY
           U                        Ba
           V                        Bb
           W                        Bc
           X                        Bd
           Y                        Be
           Z                        Bf
           a                        Bg
           b                        Bh
           c                        Bi
           d                        Bj
           e                        Bk
           f                        Bl
           g                        Bm
           h                        Bn
           i                        Bo
           j                        Bp
           k                        Bq
           l                        Bt
           m                        Bu
           n                        Bv
           o                        Bw
           p                        Bx
           q                        Bz
