(Freun) Research Associate, Department of Veterinary PathoBiology.
(Mickelson) Assistant Professor, Department of Veterinary PathoBiology.
(Roghair) Junior Scientist, Department of Veterinary PathoBiology.
(Litterer) Scientist, Department of Veterinary PathoBiology.
(Louis) Professor, Department of Veterinary PathoBiology and the Department of Biochemistry.
Received from the Department of Veterinary PathoBiology and the Department of Biochemistry, University of Minnesota, St. Paul, Minnesota. Submitted for publication August 17, 1994. Accepted for publication February 6, 1995. Supported by National Institutes of Health grant GM-31382.
Address reprint requests to Dr. Fruen: Department of Veterinary PathoBiology. University of Minnesota. 1988 Fitch Avenue. Room 295, St. Paul, Minnesota 55108.