Succinylated wheat germ agglutinin (Succ-WGA) is affinity purified from the native wheat germ agglutinin (WGA). It is dimeric at pH as low as 5 and dissociates at pH lower than 4.5. Succ-WGA agglutinates rabbit erythrocytes at a minimal concentration of about 2g/ml, and agglutinates human erythrocytes of blood groups A, B, and O types. The solubility of Succ-WGA is around 100 times higher than the unmodified lectin at neutral pH. Ulike native WGA, Succ-WGA does not bind to sialic acid residues but retains its specificity towards N-acetylglucosamine. The use of conjugates of the native WGA and the succinylated allows to distinguish between sialylated glycoconjugates and others N-acetylglucosamine structures. See other Succ-WGA conjugates.
Colloidal gold can be used to visualize localization of specific saccharide moieties and examine the distribution of plasma membrane glycoproteins based on the binding pattern of Succinylated Triticum vulgaris Lectin (Succ WGA). Colloidal gold labeled lectins can be viewed via electron microscopy.