Changes

* 5 different case studies

1. Cotransformation: a process to transfer genes into mammalian cells (Columbia University).

2. Gallium Nitride: a semiconductor with both military and commercial applications (University of California).

3. Xalatan: a glaucoma treatment (Columbia University).

4. Ames II Tests: a bacteria assay for testing potential carcinogenic properties of pharmaceuticals and cosmetics (University of California).

5. Soluble CD4: a prototype for a drug to fight AIDS (Columbia University).