GSL II is affinity purified tetramer that contains a single type of 30kD subunit. It has insecticidal structure/function, the first GlcNAc binding legume lectin proven to have insecticidal activity. This lectin has a carbohydrate specificity for alphaGal and alphaGalNAc and elutes with galactose or N-acetylgalactosamine. Increasing the number of N-acetylglucosamine residues beyond two does not improve affinity. It has been reported to be unique in its ability to recognize exclusively alpha- or β-linked N-acetylglucosamine residues on the nonreducing terminal oligosaccharides. This lectin shows specificity for blood group A(-SA) greater than blood group B(-SA).||Source:|Bandeiraea||Blood Specificity:|A (-SA) >> B (-SA)||Sugar Specificity:|alpha-N-Acetylglucosamine, beta-N-Acetylglucosamine||Inhibitory Carbohydrate:|Chitin Hydrolysate or N-Acetylglucosamine||Divalent Ions:|Ca++, Mn++||Storage and Stability:|Lyophilized powder may be stored at -20°C. Stable for 12 months after receipt at -20°C. Reconstitute with sterile buffer or ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Reconstituted product is stable for 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.