1. Institute for Cellular and Molecular Biology (R.G., I.M.-C., A.C.G., D.C.), The University of Texas at Austin, Austin, Texas 78712
2. Center for Reproductive Biology (E.E.N., M.K.S.), School of Biological Sciences, Washington State University, Pullman, Washington 99164
3. Division of Pharmacology and Toxicology (A.C.G., D.C.), The University of Texas at Austin, Austin, Texas 78712
4. Department of Integrative Biology (D.C.), The University of Texas at Austin, Austin, Texas 78712