Effect of boronic acids on antifreeze proteins.

The activity of antifreeze glycoprotein from the blood serum of Boreagadus saida was strongly inhibited by ions of organic boronic acids as well as by borate. The activity of nonglycoprotein from the blood serum of Pseudopleuronectus americanus, however, was not similarly inhibited. The inhibition by borate is thus specific for molecules with the carbohydrate moiety.