neuraminic acid

(redirected from prehemataminic acid)
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sialidase

 [si-al´ĭ-dās]
1. an enzyme of the hydrolase class that catalyzes the cleavage of glucosidic linkages between a sialic acid residue and a hexose or hexosamine residue at the nonreducing terminal of oligosaccharides in glycoproteins, glycolipids, and proteoglycans. Deficiency of it is an autosomal recessive trait and is seen in sialidosis and galactosialidosis.
2. the enzyme with this activity specifically cleaving sialic acid–containing gangliosides; it is deficient in mucolipidosis IV. Called also neuraminidase.

neur·a·min·ic ac·id

(nūr'ă-min'ik as'id),
An aldol product of d-mannosamine and pyruvic acid, linking the C-1 of the former to the C-3 of the latter. The N- and O-acyl derivatives of neuraminic acid are known as sialic acids and are constituents of gangliosides and of the polysaccharide components of mucoproteins and glycoproteins from many tissues, secretions, and species.
Synonym(s): prehemataminic acid

neuraminic acid

/neu·ra·min·ic ac·id/ (noor″ah-min´ik) a 9-carbon amino sugar whose N- acyl derivatives are the sialic acids.

neuraminic acid

[noor′ah-min′ik]
a nine-carbon amino acid formed from mannosamine and pyruvate. See also sialidase.

neu·ra·min·ic ac·id

(nūr'ă-min'ik as'id)
An aldol product of d-mannosamine and pyruvic acid. The N- and O-acyl derivatives of neuraminic acid are known as sialic acids and are constituents of gangliosides and of the polysaccharide components of muco- and glycoproteins from many tissues and secretions.

neuraminic acid

a nine-carbon sugar; parent of a family of amino sugars containing nine or more carbon atoms (the sialic acids or nonulosaminic acids).