Wheat germ agglutinin (WGA) is a lectin protein that binds to N-acetyl-D-glucosamine and Sialic acid on the residues of the proteins located in the plasma membrane of mammalian cells. WGA exists mostly as a heterodimer of 38 kDa. It is cationic at physiological pH.
Because the glycoconjugates are extracellular modifications, WGA can be used to stain live cell cultures of human and rodent origins.
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