Affiliation: | a Institute of Genetics, University of Glasgow, Church St., Glasgow G11 5JS, U.K. Tel. (041) 339-8855 b Cetus Corporation, 1400 Fifty-Third St., Emeryville, CA 94608, U.S.A. Tel. (415) 420-3300 c Plant Molecular Genetics Unit, Sir Harold Mitchell Bldg., University of St. Andrews, St. Andrews, Fife, KY16 9TH, U.K. |