    New chain ID            Original chain ID

28ln-pdb-bundle1.pdb:
           A                        B1
           B                        B2
           C                        B4
           D                        B5
           E                        B7
           F                        B8
           G                        BA
           H                        BB
           I                        BC
           J                        BD
           K                        BE

28ln-pdb-bundle2.pdb:
           A                        BF
           B                        BG
           C                        BH
           D                        BI
           E                        BJ
           F                        BL
           G                        BM
           H                        BN
           I                        BO
           J                        BP
           K                        BQ
           L                        BR
           M                        BS
           N                        BT
           O                        BU
           P                        BV
           Q                        BW
           R                        BX
           S                        BY
           T                        BZ
           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                        Bo
           i                        Bp
           j                        Br
           k                        Bs
           l                        Bt
           m                        Bu
           n                        Bv
           o                        A2
           p                        AA
           q                        AB
           r                        AC
           s                        AD
           t                        AE
           u                        AF
           v                        AG
           w                        AH
           x                        AI

28ln-pdb-bundle3.pdb:
           A                        AJ
           B                        AK
           C                        AL
           D                        AM
           E                        AN
           F                        AO
           G                        AP
           H                        AQ
           I                        AR
           J                        AS
           K                        AT
           L                        AU
           M                        AV
           N                        AW
           O                        AX
           P                        AY
           Q                        AZ
           R                        Aa
           S                        Ab
           T                        Ac
           U                        Ad
           V                        Ae
           W                        Af
           X                        Ag
           Y                        Ah
