Organic or inorganic? Small or macromolecule?

I'm planning to grow reaction center crystals 

First check the solubility of your material with different solvents. Try to be smarter by checking the increasing rate of productivity of crystal with controlled vapour pressure of your solvent.

Bernadine  -  two comments.  First re the VBL project: The program used was dedicated for the old Mac OS 9 system and was up and running until  late 2007 or so. I had for a few years a CD with the basic programming language of all VBL sections. I did  send copies of to a few scientists/teachers who apparently could run it on their old Macs.  I have searched for copies of the CD:s but they have probably been  discarded. Still looking though.

I imagine that your reaction center is a membrane protein. These are, as you surely know by now, generally most difficult to crystallize. It is not my specialty and may I suggest that you make contact with research groups who have been successful. Just look up recent membrane protein structures i MedLine or on Google and you will see which groups have solved structures of reaction centers resembling yours.

Best regards

Sture

Hello Sture: I have my doubts that OS 9 would work these days since the OS would always urge you to upgrade once they created an updated OS even if you are using an old computer... unless their computer allowed the OS to remain with an OS 9 which is highly obsolete, nevertheless I'll also look through

I agree with your suggestions and I've always been using Medline and Google Scholar. I am also collaborating with several structural protein research groups in Washington DC area.. 

The reaction  center from purple bacteria was crystallized back in the 1980's.  PSII was crystallized around 2000.  A simple literature search can find these papers and you can then simply duplicate previous successful methods.