Anti-B activity of a lectin coexistent with blood group H-like substance in seeds of Euonymus sieboldiana.

Euonymus Sieboldiana seeds possess a lectin for human erythrocytes with anti-B specificity. Lectin fractions with strong agglutinating activity were separated by ammonium sulphate precipitation from blood group H-like substance, which is coexistent in the same seeds. The lectin has properties resembling a complete agglutinin, being non-dialysable, inactivated by heat treatment at 70 degrees C and specific for D-galactoside.