it is because they are easier to work with. I always come backto that. No,also, especially for the bio-physicists who came in from physics or whoare not so familiar with different kinds of biological material. To a biologist, perhaps, working with the fruit fly may not pose any great problem. Whereas,I think to the physicist it may appearto be a little complex. But working with yeast, whereall you have to dois inoculate the liquid culture, put it in an incubator and lookat it the next day; has it got yeast in there or not and so forth. Those are the technical advantages. I think that's the answer. I don't see that yeast has any great virtue. Well, perhaps it has one. There are two kinds of yeast cells. There are somethat are haploid and there are somethat are diploid. So you can compare the "one chromosome" group with the "paired chromosome" group and see what difference having the second chromosomes makes. BERGE: So that's a virtue. Can you talk about some of the other people that worked in the lab? For example, you mentioned before Low-Beer. BERGE: No, Low-Beer didn't work in the lab. Dr. Low-Beer was the head of the Radiation Therapy Division of the Department of Radiology at the University of California San Francisco. He was from Czechoslovakiahe had escapedfi believe, from Prague. Very interestingly, I think his father had been the chie? Rabbi, and he went to England. I believe he worked at Manchester for awhile with radioisotopes in the laboratory over there. So he was familiar with say radioactive phosphorus, right, which was a well known tool in those days. But he had beentrained as a radiologist originally. He simply got that job when he entered England, and he then cameto the United States. I don't know quite how he got to Dr. Stone's department. I think he may have 10 ZZ