so then for segID, it might look like:

load xxx.pdb filter "type 73,4"
display atomtype="PROA"

Var proagroups = {atomtype="PROA"}

select *.ca and atomtype="PROA"

*for example
*


On Wed, Jan 16, 2013 at 7:21 AM, Robert Hanson <hans...@stolaf.edu> wrote:

> OK, this is in in a much more generally useful way, I think. See
> http://chemapps.stolaf.edu/jmol/Jmol-13.zip
>
> ___JmolVersion="13.1.12_dev"
>
> new feature: load xxx.pdb filter "TYPE i,n"
>   -- loads custom text fields into the "atomType" property of an atom upon
> customized PDB file loading
>      where i is the number of the column (starting with 1) and n is the
> number of columns
>   -- text is trimmed
>   -- e.g. load xxx.pdb filter "TYPE 73,4" loads four characters starting
> at column 73 as "atomType" (segID)
>   -- to convert to a numerical value, convert that to .property_foo:
>      load xxx.pdb filter "type 22,4"; {*}.property_seqNo = {*}.atomType
>
> new feature: PDB filter "TYPE 73,4=xxx"
>   -- loads four characters starting at column 73 (1-based) as "atomType"
>   -- loads only those atoms with atom types starting with "xxx"
>
> Bob
>
>
>
> On Tue, Jan 15, 2013 at 5:15 PM, Angel Herráez <angel.herr...@uah.es>wrote:
>
>> **
>> Hi
>>
>>  So this is a question of file format.
>>
>>  PDB file format specification has not any hint of columns 72-75 or the
>> segID field, either in the current Version 3.3: July, 2011 / Nov. 21, 2012
>> http://www.wwpdb.org/documentation/format33/sect9.html#ATOM
>> or in the oldest referenced in wwPDB, Version 2.3, July 9, 1998
>> http://www.wwpdb.org/documentation/format23/sect9.html#ATOM
>>
>>  So that's really going waaaay far in history :)
>>
>>  You issue is then of a nonstandard format, I'd say.
>> Not sure how reasonable it is to implement this, but it can probably be
>> easy a new file reader for that (not that I can do it) -- one additional
>> problem would be how to differentiate whether files are true pdb or
>> "special" pdb. One would have to use the forced syntax,
>>  load "filetype::filename"
>>
>>
>>  If you have someone that can program Java, as an example there is PQR
>> format which is an extension of the PDB format and could be used as a guide
>>
>> http://jmol.svn.sourceforge.net/viewvc/jmol/trunk/Jmol/src/org/jmol/adapter/readers/more/PqrReader.java?revision=17863&view=markup
>>
>> http://jmol.svn.sourceforge.net/viewvc/jmol/trunk/Jmol/src/org/jmol/adapter/readers/cifpdb/PdbReader.java?revision=17863&view=markup
>>
>>
>>  > Much application software today incorporates the use of the segid
>> keyword
>>
>>  I find that rather odd. Where do the values of segid come from?
>> Certainly not from experimental data deposited in PDB.
>>
>>
>>
>>
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>
>
> --
> Robert M. Hanson
> Larson-Anderson Professor of Chemistry
> Chair, Chemistry Department
> St. Olaf College
> Northfield, MN
> http://www.stolaf.edu/people/hansonr
>
>
> If nature does not answer first what we want,
> it is better to take what answer we get.
>
> -- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
>
>


-- 
Robert M. Hanson
Larson-Anderson Professor of Chemistry
Chair, Chemistry Department
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get.

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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