I also became interested in chemistry and gradually accumulated enough test tubes and other glassware to do chemical experiments, using small quantities of chemicals purchased from a pharmacy supply house.

During this period, I became interested in how the new techniques of cloning and sequencing DNA could influence the study of genetics and I was an early and active proponent of the Human Genome Sequencing Project.

When the chemistry is right, all the experiments work.

I was also interested in formulating the path of chemical reactions.

In my second year, after moving to the Medical School, I began the courses of Anatomy and Physiology. I had begun to see that I was interested in cells and their functions.

What might we know about these chemicals 20 years from now? ... We can't continue to pretend that as long as we don't know about any risks, we don't have a problem.