AMHERST, Mass. - The biotechnology techniques that enabled University of Massachusetts researchers to produce three cloned, transgenic calves last January will be published in the May 22 issue of the prestigious journal, Science. The research was conducted by James Robl, professor of veterinary and animal sciences at UMass, and Steven Stice, of Advanced Cell Technology (ACT) Inc., an adjunct faculty member at the University. The article includes new details on how researchers were able to extend the lifespan of certain cells, which may help scientists to introduce complex genetic modifications in cloned animals. Co-authors on the paper include recent UMass Ph.D. graduate Jose Cibelli, ACT research associates Paul Golueke, Jeff Kane, Joseph Jerry, Cathy Blackwell, and former UMass faculty member F. Abel Ponce de Leon, now at the University of Minnesota.