紅藻オオシコロの赤血球疑集素の諸性質〔英文〕

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The red alga Serraticardia maxima was found to possess hemagglutinins against various kinds of animal erythrocytes, and some biochemical properties of the hemagglutinins were examined. In an adsorption test with horse erythrocytes, the activity disappeared against horse, rabbit and guinea pig erythrocytes. The hemagglutinins were unstable to diaysis. The activity was completely lost by heating at 60°C and 70°C but not at 80°C and 90°C. the results indicate the presence of an unknown factor which inactivates the hemagglutinins at 60°C-70°C but not at 80°C-90°C. The hemagglutinins were stable over a wide range of pH values between 4 and 10. Their activity was not affected by the divalent metal cations or the simple sugars tested. A single peak with hemagglutinating activity was observed in gel filtration on Sephacryl S-200. The molecular weight of the hemagglutinins was estimated to be about 25, 000 from the elution position. These results were different in several points from those previously reported with the hemagglutinins of two red algae, Agardhiella tenera and Cystoclonium purpureum.
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