The agglutination of the crude proteins from 4 species of animals

8native erythrocytes from 5 kinds of vertebrates,7 kinds of single-cell microbe and 5 single-cell algae were used to detect agglutination activity from 4 marine mollusceas. All protein solutions have hemagglutination. Sheep erythrocyte, Saccharomyces carlsbergensi and Porphyridium purpureum are more sensitive to agglutination than the others. The agglutinations need pH 6.5～8.0 as fit conditions, but can’t tolerate high temperature. They all lost the activity under 60℃ or 65℃ for 15min .The hemagglutination activity can be inhibited by different kinds of saccharide and 0.02mol/L EDTA.