Phil, you should check out DSSR. It is amazing! Sorry this is not
documented yet:

new feature: select shortcuts for nucleic acid structures
  -- for example: select junctions; select kissingloops
  -- activated after load =xxxx/dssr or calculate structure dssr
  -- includes:
    "@bulges within(dssr,'bulges')",
    "@coaxStacks within(dssr,'coaxStacks')",
    "@hairpins within(dssr,'hairpins')",
    "@hbonds within(dssr,'hbonds')",
    "@helices within(dssr,'helices')",
    "@iloops within(dssr,'iloops')",
    "@isoCanonPairs within(dssr,'isoCanonPairs')",
    "@junctions within(dssr,'junctions')",
    "@kissingLoops within(dssr,'kissingLoops')",
    "@multiplets within(dssr,'multiplets')",
    "@nonStack within(dssr,'nonStack')",
    "@nts within(dssr,'nts')",
    "@naChains within(dssr,'naChains')",
    "@pairs within(dssr,'pairs')",
    "@ssSegments within(dssr,'ssSegments')",
    "@stacks within(dssr,'stacks')",
    "@stems within(dssr,'stems')",



load =1d66/dssr
$ print _M.dssr.pairs.select("(nt*) where bp='C-G' or bp='G-C'")
|1|E|DG|38||||
|1|D|DC|1||||
|1|E|DG|37||||
|1|D|DC|2||||
...
|1|D|DG|19||||

$ x= _M.dssr.pairs.select("(nt*) where bp='C-G' or bp='G-C'")
$ select x


Works for RNA and DNA



On Thu, Apr 14, 2016 at 9:07 AM, Philip Bays <pb...@saintmarys.edu> wrote:

> This is for the biomolecular people:
>
> How does one use the term “Selected”?  Seems to me that it is redundant.
>
> In the Nucleic Acid area: How does one use CG and AT to select base
> pairing?
>
> Perhaps these are not implemented in Jmol?
>
> PS  I am finding today’s version to work well for my purposes, which are
> limited.  And HEM now works:-)
>
> Philip Bays
> Emeritus Professor of Chemistry
> Saint Mary's College
> Notre Dame, IN 46556
> pb...@saintmarys.edu
>
>
>
>
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-- 
Robert M. Hanson
Larson-Anderson Professor of Chemistry
Chair, Department of Chemistry
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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