Hi Yeping Sun,
Did you solve your problem?
According to http://www.wwpdb.org/procedure.html#toc_4
"
What is the maximum number of chain IDs in a file?
Up to 62 chains can be included in the PDB entry. Upper case letters and
numbers (0-9) should be used first for chain IDs. Lower case letters should
be used only after all upper letters and numbers have been used. Symbols
should never be used for chain IDs."
you can use numbers and also small letters in the PDB file format.
I don't know if PyMOL will let you do this, though.
Regards,
Folmer
2014-09-02 10:41 GMT+02:00 sunyeping <sunyep...@aliyun.com>:
> I have a protein which contains 32 chains. By using A-Z can only name 26
> chains. Can I use expression containing two character such as A1, AB, etc.
> to as chain id? Will this change the format of the pdb files?
>
> Yeping Sun
>
> Institute of Microbiology, Chinese Academy of Sciences
>
>
>
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--
Folmer Fredslund
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