raffinose

raf·fi·nose

R0019300 (răf′ə-nōs′)n. A trisaccharide, C₁₈H₃₂O₁₆, composed of glucose, fructose, and galactose. It is obtained from sugar beets and cottonseed meal and is present in many legumes.

[French, from raffiner, to refine : re-, again (from Old French; see re-) + affiner, to refine (from Old French : a-, to from Latin ad-; see ad- + fin, fine, from Old French; see fine¹).]

raffinose

(ˈræfɪˌnəʊz; -ˌnəʊs) n (Biochemistry) biochem a trisaccharide of fructose, glucose, and galactose that occurs in sugar beet, cotton seed, certain cereals, etc. Formula: C18H32O16[C19: from French raffiner to refine + -ose²]

raf•fi•nose

(ˈræf əˌnoʊs)

n. a colorless, crystalline sugar, C₁₈H₃₂O₁₆∙5H₂O, with little or no sweetness, obtained from cottonseed and sugar beets and breaking down to fructose, glucose, and galactose on hydrolysis. [1875–80; < French raffiner to refine]

Thesaurus

Noun

raffinose - a trisaccharide that occurs in sugar beets and cotton seeds and certain cerealstrisaccharide - any of a variety of carbohydrates that yield three monosaccharide molecules on complete hydrolysis

Raffinose

enUK

Raffinose

The best-known trisaccharide (oligosaccharide), widely distributed in higher plants. The best-known sources are cottonseed meal and the manna of Eucalyptus. It is also known as melitose, melitriose, gossypose, and O-α- d -galactopyranosyl-(1→6)-O-α- d -glucopyranosyl-(1→2)-β- d -fructofuranoside. See Oligosaccharide

Complete acid hydrolysis gives 1 mole each of d -galactose, d -glucose, and d -fructose. In structure, it comprises melibiose and sucrose with the central d -glucose in common. See Fructose, Galactose, Glucose

Raffinose can be hydrolyzed by enzymes in two ways. Invertase (β- d -fructofuranoside) hydrolyzes the sucrose part of the molecule to give melibiose and d -fructose. Almond emulsin, which contains an α- d -galactosidase, hydrolyzes the melibiose residue to yield d -galactose and sucrose.

Raffinose was found to be enzymically synthesized in plants from uridine diphosphate d -galactose and sucrose by an enzyme which transfers the d -galactose moiety of this sugar nucleotide to sucrose, resulting in the formation of raffinose.

Raffinose

a nonreducing trisaccharide composed of residues of D-galactose, D-glucose, and D-fructose. Raffinose is a colorless water-soluble substance with melting points of 80°C (pentahydrate) and 119°–120°C (anhydrous). It is one of the most widely distributed stored carbohydrates in plants (sugar beet, cottonseed meal, Australian manna). The enzyme a-galactosidase splits raffinose into galactose and the disacchar-ide saccharose, and invertase splits it into fructose and melibiose.

raffinose

[′raf·ə‚nōs] (biochemistry) C₁₈H₃₂O₁₆·5H₂O A white, crystalline trisaccharide found in sugarbeets, cottonseed meal, and molasses; yields glucose, fructose, and galactose on complete hydrolysis. Also known as gossypose; melitose; melitriose.

raffinose

raf·fi·nose

(raf'i-nōs), A dextrorotatory trisaccharide, occurring in cotton seed and in the molasses of beet root, composed of d-galactose, d-glucose, and d-fructose and formed by transfer of d-galactose from UDP-d-galactose to sucrose; many seeds are rich in raffinose. Synonym(s): gossypose, melitose, melitriose

raffinose

(răf′ə-nōs′)n. A trisaccharide, C₁₈H₃₂O₁₆, composed of glucose, fructose, and galactose. It is obtained from sugar beets and cottonseed meal and is present in many legumes.

raffinose

(răf′ĭ-nōs) A trisaccharide, melitose, present in certain plants, cereals, and fungi. Hydrolysis yields fructose and melibiose.

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Words related to raffinose

noun a trisaccharide that occurs in sugar beets and cotton seeds and certain cereals

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