Cawthron Institute signs up global partner to sell valuable marine biotoxins used in shellfish testing Unique marine biotoxins valued at over $100,000 per teaspoonful will be supplied to laboratories worldwide in a global distribution deal between Cawthron Institute and international analytical and Fiona Rotherham Tue, 11 Nov 2014 Cawthron InstituteSigma-AldrichCharles Eason