    New chain ID            Original chain ID

3j9z-pdb-bundle1.pdb:
           A                        SA
           B                        S6
           C                        S7
           D                        SJ
           E                        SK
           F                        SL
           G                        SM
           H                        SN
           I                        SO
           J                        SP
           K                        SQ
           L                        SR
           M                        SS
           N                        SB
           O                        ST
           P                        SU
           Q                        SC
           R                        SD
           S                        SE
           T                        SF
           U                        SG
           V                        SH
           W                        SI
           X                        S1

3j9z-pdb-bundle2.pdb:
           A                        LA
           B                        LB
           C                        LC
           D                        LM
           E                        LN
           F                        LO
           G                        LP
           H                        LQ
           I                        LR
           J                        LS
           K                        LT
           L                        LU
           M                        LV
           N                        LD
           O                        LW
           P                        LX
           Q                        LY
           R                        L1
           S                        L2
           T                        L3
           U                        L4
           V                        L5
           W                        L6
           X                        LE
           Y                        L7
           Z                        L8
           a                        L9
           b                        LF
           c                        LG
           d                        LH
           e                        LI
           f                        LJ
           g                        LK
           h                        LZ
