    New chain ID            Original chain ID

7zw0-pdb-bundle1.pdb:
           A                        LA
           B                        LB

7zw0-pdb-bundle2.pdb:
           A                         2
           B                        sP
           C                        sQ
           D                        sE
           E                        sR
           F                        sA
           G                        sS
           H                        sB
           I                        sT
           J                        sU
           K                        sV
           L                        sW
           M                        sC
           N                        sX
           O                        sD
           P                        sY
           Q                        sZ
           R                        sF
           S                        sG
           T                        sH
           U                        sI
           V                        sJ
           W                        sa
           X                        sb
           Y                        sc
           Z                        sd
           a                        sK
           b                        se
           c                        sf
           d                        sM
           e                        sg
           f                        sN
           g                        sO
           h                        sL
           i                        sj
           j                        sk
           k                        sm
           l                        sl
           m                        sn
           n                        LC
           o                        LD
           p                        LE
           q                        LF
           r                        LG
           s                        LH
           t                        LI

7zw0-pdb-bundle3.pdb:
           A                        LJ
           B                        LK
           C                        LL
           D                        LM
           E                        LN
           F                        LO
           G                        LP
           H                        LQ
           I                        LR
           J                        LS
           K                        LT
           L                        LU
           M                        LV
           N                        LW
           O                        LX
           P                        LY
           Q                        LZ
           R                        La
           S                        Lb
           T                        Lc
           U                        Ld
           V                        Le
           W                        Lf
           X                        Lg
           Y                        Lh
           Z                        Li
           a                        Lj
           b                        Lk
           c                        Ll
           d                        Lm
           e                        Ln
           f                        Lo
           g                        Lp
           h                        Lq
           i                        Lr
           j                        Ls
           k                        Lt
           l                        sh
