Boris S. ZhorovÝ
and Vettai S. Ananthanarayanan*

Department of Biochemistry,
McMaster University,
Hamilton, Ontario, Canada, L8N 3Z5

ÝOn leave from:
Sechenov Institute of Evolutionary Physiology and Biochemistry of the
Russian Academy of Sciences,
St. Petersburg, Russia.

*Author to whom correspondence should be addressed.
Phone: 905 525-9140, Ext. 22783; Fax: 905 522-9033;
E-mail: ananth@fhs.mcmaster.ca