Helmut Ponta¹ and Peter Herrlich^1,2

1 Forschungszentrum Karlsruhe, Institute of Genetics, and ² University of Karlsruhe, Institute of Genetics, Postfach 3640, D-76021 Karlsruhe, Germany

Received 4/27/98 Accepted 5/12/98

Send correspondence to:

Prof. Dr. Helmut Ponta
University of Karlsruhe, Institute of Genetics
Postfach 3640
D-76021 Karlsruhe, Germany

Tel.+49-7247-82 4483
Fax+49-7247-82 3354
E-mail: genetik@igen.fzk.de