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bioWORLD is a global leader in manufacturing and supplying a wide range of products for life science research. With over 25 years of experience, they have focused on providing quality products and excellent customer service. Their diverse customer base includes hospitals, public health institutions, commercial laboratories, biotechnology companies, pharmaceutical firms, universities, and research institutions. Website : www.bio-world.com
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![Styphnolobium japonicum (Japanese pagoda) Lectin (SJA)](https://www.clinisciences.com/en/upload/sja-lectin-ysm9h9.png)
Styphnolobium japonicum (Japanese pagoda) Lectin (SJA)
The seeds and pods of S. japonicum contain various haemagglutinins (lectins). This probably explains the toxic effect of intravenous administration of a seed or pod extract.
Styphnolobium japonicum agglutinin (SJA) is affinity purified from Japanese pagoda tree seeds. It consists of two subunits. The subunits can be separated into two subfractions, a D-galactose/N-acetyl-D-galactosamine specific lectin (B-SJA-I) and a D-mannose/D-glucose specific lectin (B-SJA-II). SJA has an isoelectric point between pH 4.9 and pH 5.6 and a carbohydrate specificity towards GalNAc. This lectin elutes with the sugar GalNAc.SJA agglutinates all blood group types but has greater affinity for A erythrocytes than of B types, than of O (-SA) types. Binding experiments of the lectin with frozen sections of human kidneys shows specific binding to the endothelia in specimens from blood groups B or AB, thus indicating a D-galactose/N-acetyl-D-galactosamine receptor specificity. SJA lacks mitogenic and immune-suppressive activity.
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