Abstract
Lipid-containing hemolymph proteins from males of the crayfish Pacifastacus leniusculus were isolated by density gradient ultracentrifugation. Two major lipoproteins, one high density lipoprotein (HDL) and one very high density lipoprotein (VHDL), were characterized. The HDL and the VHDL were found to be identical to two proteins previously studied for their roles in immune recognition and hemolymph clotting, namely the β-1,3-glucan binding protein and the clotting protein. These results imply that crayfish lipoproteins have dual functions, and that they are involved in immunity, hemolymph clotting, and lipid transport in these animals. Also, the oxygen-transporting protein hemocyanin was found to have a small lipid content.
Published Version
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