1. Departments of Zoology and Genetics (J.T.F.), Iowa State University, Ames, Iowa 50011
2. Departments of Molecular, Cellular and Developmental Biology Program (J.T.F., M.N.-H.), Iowa State University, Ames, Iowa 50011
3. Departments of Biochemistry, Biophysics, and Molecular Biology (M.N.-H.), Iowa State University, Ames, Iowa 50011