D-stachyose

Sagittardia sagittifolia L. Ci Gu (Arrow head) (whole plant) d-raffinose, d-stachyose, d-verbascose, d-fructose, d-galactose, glucose, asparagine, vitamin B.48 Bruised leaves for bugbite, foul sores, scrofulous ulcers, antilactogogue. 

The tetrasaccharide stachyose [470-55-3] which contains an additional (1 — 6)-1inked a-D-galactopyranosyl unit, is almost as widely distributed as raffinose, but is present in even lower concentrations. Although raffinose and stachyose occur in all parts of plants, they are concentrated in storage tissues, eg, sugar beets and beans, and leaves for the most part. 

Sophorose Stachyose P-D-Glucopyranosyl-(1->2)-D-glucose p-D-Fructofuranosyl a-D-galadopyranosyl (1 ->6)-a-D-galactopyranosyl-(1 ->6)-a-D-glucopyranoside... 

C24H42021-4.4 H20 0-a-Galactopyranosyl-( 1 — 6)-0-a-D-galactopyranosyl-( 1 — 6)-O-a-D-fucopyranosyl /J-D-fructofuranoside, hydrate (stachyose, hydrate) STACHY 34 372... 

However, GrootWassink and Fleming64 reported a higher rate of hydrolysis of stachyose than raffinose for a commercial preparation of /3-D-fructofuranosidase of Saccharomyces cerevisiae. 

Very successful experiments were carried out on the oxidation of sucrose, one mole of which needs three moles of periodic acid, with the formation of one mole each of formic acid and a tetraaldehyde. The latter is oxidized by bromine to a tetracarboxylic acid subsequent acid hydrolysis of the oxygen bridges affords a mixture of acids, all of which were isolated and identified. These results brought in 1943 a confirmation of the structure of sucrose which was discussed, and which gained the approval of C. S. Hudson who, before that, was a little doubtful about the furanoid form of the D-fructosyl group. Similar work was done later with trehalose. In the same way, J. . Courtois obtained confirmation of the structure of raffinose, and established that of stachyose. 

Morgenlie95 isolated a tetrasaccharide from Festuca rubra, and elucidated its structure as being 0-a-D-galactopyranosyl-(l- 4)-0-a-D-ga-lactopyranosyl-(l- 3)-a-D-glucopyranosyl /3-D-fructofuranoside. Raf-finose and stachyose co-exist with this tetrasaccharide. 

Kandler and coworkers818 isolated from the mature seeds of V.faba (see also, Refs. 293 and 298) an enzyme that transfers the D-galactosyl group of galactinol to raffinose, yielding stachyose (compare with Refs. 34, 296, and 615), and to stachyose, yielding verbascose. When... 

The a-D-galactosidase-catalyzed transfer of the D-galactosyl group of an a-D-galactoside to sucrose, raffinose, and stachyose may yield the raffinose family of oligosaccharides.44 The trans-D-galactosylase activity of a-D-galactosidase was demonstrated in 1950 by Blanchard and... 

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