Separation of Individuals of Any Blood Group into Secretors and Non-Secretors by Use of a Plant Agglutinin (Lectin)

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Abstract
It has been found that an anti-H agglutinin, prepared by simple saline extraction of seeds of Ulex europeus, is suitable for the routine separation of individuals into secretors and non-secretors, merely by testing the ability of the undiluted saliva of the subjects to inhibit the agglutination of group O erythrocytes by the undiluted Ulex extract.