SOME PROPERTIES OF AN AGGLUTININ IN THE HAEMOLYMPH OF THE POND SNAILLYMNAEA STAGNALIS

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Abstract
A broad spectrum agglutinin in the haemolymph of the pond snail, Lymnaea stagnalis, is described. At dilutions ranging up to 1/2048 it agglutinated erythrocytes of several sources, bacteria and yeast cells. Haemolymph of some specimens agglutinated all types of cells, whereas that of others did not agglutinate human and sheep erythrocytes. In inhibition tests with a variety of carbohydrates, D-galactose, L-forms of some monosaccharides, and 3 polysaccharides, especially L. stagnalis galactogen, were good inhibitors. The agglutinin is a protein with a M. W. of approximately 60,000. It was demonstrated in vitro that the agglutinin probably has opsonizing properties.

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