Exo-α-sialidase is a glycoside hydrolase that cleaves the glycosidic linkages of neuraminic acids: Hydrolysis of α--, α--, α-- glycosidic linkages of terminal sialic acid residues in oligosaccharides, glycoproteins, glycolipids, colominic acid and synthetic substratesNeuraminidase enzymes are a large family, found in a range of organisms. Wikipedia