Russell D. Hays

RUSSELL D. HAYS became Chairman, President and Chief Executive Officer
of BioSource International, Inc., effective September 18, 2000. Mr. Hays
came to BioSource from NEN Life Sciences, Inc., a $125 million a year
corporation in proprietary research reagent systems in drug discovery
research, where he served as President and Chief Executive Officer. That
company successfully completed a strategic sale to PerkinElmer, Inc.
Prior to joining NEN Life Sciences, Mr. Hays served as President and
Chief Executive Officer of Enzytech, Inc.