    New chain ID            Original chain ID

8bqx-pdb-bundle1.pdb:
           A                         x
           B                         A
           C                         B
           D                         C
           E                         D
           F                         E
           G                         F
           H                         G
           I                         H
           J                         I
           K                         J
           L                         K
           M                         L
           N                         M
           O                         N
           P                         O
           Q                         P
           R                         Q
           S                         R
           T                         S
           U                         T
           V                         U
           W                         V
           X                         W
           Y                         X
           Z                         Y
           a                         Z
           b                        AA
           c                        BA
           d                        AB
           e                        BB
           f                        AC
           g                        BC
           h                         2
           i                         a
           j                         b
           k                         c
           l                         d
           m                         e
           n                         f
           o                         g

8bqx-pdb-bundle2.pdb:
           A                        BQ
           B                        BR
           C                        BS
           D                        AW
           E                        BE
           F                        BI
           G                        BM
           H                        BO
           I                        AD
           J                        BD
           K                        AG
           L                        AJ
           M                        AM
           N                        AQ
           O                        AU
           P                        AX

8bqx-pdb-bundle3.pdb:
           A                        BF
           B                        BH
           C                        BJ
           D                        BL
           E                        AE
           F                        AH
           G                        AK
           H                        AN
           I                        AR
           J                        AV
           K                        AY
           L                        BG
           M                        BK
           N                        BN
           O                        BP
           P                        AF
           Q                        AI
           R                        AL
           S                        AO
           T                        AS
           U                        AP
           V                        AT
           W                        BT
