Chiles TC, Bird KT. Gracilaria tikvahiae agglutinin. Partial purification and preliminary characterization of its carbohydrate specificity.
Carbohydr Res 1990;
207:319-26. [PMID:
2076522 DOI:
10.1016/0008-6215(90)84059-4]
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Abstract
A potent agglutinin of rabbit and sheep red blood cells, obtained from the red alga Gracilaria tikvahiae, was purified by ammonium sulfate fractionation, ion exchange, gel filtration, and hydroxylapatite chromatography. Human A and B blood group erythrocytes were also agglutinated, whereas human O blood group erythrocytes were not agglutinated. The hemagglutination titer was not significantly affected by the addition of EDTA or the divalent cations Ca2+, Mg2+, or Mn2+. The carbohydrate specificity was characterized by hemagglutination inhibition using various monosaccharides, glycoproteins, and glycopeptides. The results suggested that the agglutinin has affinity for N-acetylneuraminic acid as well as glycoconjugates containing N-acetylneuraminic acid.
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