foldit doesn't do electron densities and I don't recall if there are any puzzles in it that mention active sites/docking (it's been more than a year since I "played" it), but it's worth a mention.
> Hi- > > I am trying to help my former chemistry teacher set up a demonstration of > protein structure for her class. I'd like to include electron density maps, > and maybe show an enzyme active site. Are there suggestions from the BB on > the easiest way to do this? Would pymol be the program of choice, or is > there a simpler program that could show electron density? Has anyone already > created such a demonstration they could and have advice on it? > > James