Abstract
Summary
The conglutination of sensitized sheep erythrocytes or zymosan requires Ca++. Mg++ and Ba++ are inactive but Sr++ appears to substitute to a limited extent for Ca++. Zymosan inhibits conglutination of sensitized sheep cells by bovine serum. Bovine properdin and zymosan react readily in the absence of Ca++, but in the presence of Mg++, without any interference due to conglutination.
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