STUDIES ON THE AGGLUTINATING AND HEMOLYSING FACTORS CONTAINED IN RICINUS COMMUSIS:I. STUDIES ON THE AGGLUTINATING FACTOR

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A substance that agglutinates the erythrocytes of various kinds of animals has been found in castor bean. This substance was isolated. and demonstrated the following properties:<br> 1. When the substance is digested by pepsin, the activity is al-most completely lost.<br> 2. The substance is extracted with saline solution, adsorbed on almina, elu+ed at pH 7.8-8.0, and precipited by the addition of sodium sulphate or ethanol. Thus purified white powder contains 14.2 per-cent of nitrogen.

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