Institution: | (1) TransGenetics Incorporated, La Jolla, California, 92037;(2) Present address: University of California at San Diego, La Jolla, California, 92093-0648;(3) Molecular and Radiation Physics Division, Petersburg Nuclear Physics Institute, St. Petersburg, 188350, Russia;(4) Present address: Howard Hughes Medical Institute, La Jolla, California, 92093-0648 |