Institution: | (1) Department of Biology, Trinity University, San Antonio, TX 78212-7200, USA, E-mail: wstone@trinity.edu, Tel.: +1-210-7368347, Fax: +1-210-7367229, US;(2) Max-Planck Institut für Biologie, Abteiling Immunogenetik, D-72076 Tübingen, Germany, DE |