The structure and biological properties of solubilized envelope proteins of Bordetella pertussis have been examined. Several envelope proteins were found to be specific for phase I strains of B. pertussis and could be isolated by selective detergent extraction. These proteins had molecular weights of 90,
Summary. Two species of marine sponge, Cliona celata and Axinella sp. produce haemagglutinins and a third species, Tethya aurantium produces a haemolysin. A crude Axinella sp. preparation agglutinates goose erythrocytes at 0.5 μg/ml. The two haemagglutinins differ from each other in their relative activities against erythrocytes from a range of vertebrate species but show no specificity of action within the Landsteiner ABO system. The substances do not diffuse through dialysis membranes; they possess unusually high electrophoretic mobilities. The inactivation of Cliona celata haemagglutinin at low pH and at elevated temperatures suggests that it may be a protein.
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