Tutorial contains two types of files.
1. staroffice5.2 presentations (*.sdd)
2. chemesis scripts (*.g)

The first staroffice presentation, UTSA-8nov02-rxn.sdd, explains why to model
calcium dynamics and second messenger pathways, and reviews the equations
and objects used to model biochemical reactions. The second staroffice 
presentation, UTSA-8nov02-cal.sdd, explains the equations and objects used
to model calcium dynamics.

Scripts will not run unless you first download and install Chemesis1.1.
Order in which scripts should be run/examined:
1. reaction-tut.g
This builds a cascade of three reactions, the ones listed in the last slide 
of the first presentation.  If you haven't seen the presentation, then
don't worry, the equations are typed into the top of the scripts. It also
includes a graph function to display the results.
2. spine.g
This is the main scripts for a slightly more complicated, and perhaps not 
as well explained, series of reactions.  It adds a few
reactions, and some stimulation paradigms.

The next four scripts are calcium dynamics, and they build on one another. 
Each script calls a calgraph_.g to display results
. cal1.g
This is the first calcium dynamics simulation.  It creates a single compartment
with calcium, a calcium buffer, and the bimolecular reaction between the two.
4. cal2.g
This adds a dendrite compartment with calcium and buffer, and diffusion between
soma and dendrite.
5. cal3.g
This adds calcium release through the IP3 receptor channel.  There are no 
pumps, so calcium goes up, and doesn't come down.  The functions to create
release, included in separate files, are extremely complicated.
6. cal4.g
This adds a SERCA pump.  Now, in the presence of IP3, a calcium spike is 
generated.