    New chain ID            Original chain ID

28zx-pdb-bundle1.pdb:
           A                        S2
           B                        Ln
           C                        SE
           D                        SA
           E                        SB
           F                        SH
           G                        SI
           H                        SL
           I                        SV
           J                        SX
           K                        Sa
           L                        SC
           M                        SG
           N                        SJ
           O                        SN
           P                        SO
           Q                        SW
           R                        SY
           S                        Sb
           T                        Se
           U                         B
           V                        SD
           W                        SF
           X                        Sf
           Y                        SR
           Z                        Sd
           a                        Sg
           b                        Sc
           c                        SK
           d                        SM
           e                        SU
           f                        SQ
           g                        SS
           h                        ST
           i                        SP
           j                        SZ
           k                         D
           l                         E
           m                         F
           n                         G
           o                         H
           p                         e
           q                         d
           r                         c

28zx-pdb-bundle2.pdb:
           A                         a
           B                        3f
           C                         m
           D                         h
           E                         k
           F                         l
