Carbohydrates melibiose

The rate of oxidation of ethylene glycol was found268-269 to attain a broad maximum between pH 2.5 and 6. In a very complete study of the effect of pH on the periodate oxidation of carbohydrates, Neumiiller and Vasseur260 showed that the oxidation of maltose, melibiose, methyl a-D-... 

In bacteria and yeasts, Li+ has strain-dependent, inhibitory, and morphological effects upon growth. The driving force behind the transport of carbohydrates and amino acids in bacteria is the proton gradient, and in both E. coli [228] and Salmonella typhimurium cells [229], Li+ stimulates the movement of proline into cells via a Li+/proline symport and the transport of melibiose via a cotransport pathway [230]. In both cases, Li+ is replacing Na+ and results in the inhibition of growth. 

Limited data are available with respect to the carbohydrate-binding specificity of abrin. Olsnes and coworkers147 demonstrated that the agglutination of erythrocytes by abrin in the presence of anti-abrin antiserum was inhibited best by D-galactose. Lactose, melibiose, and D-fucose (in the order of decreasing potency) gave weaker inhibition, whereas D-glucose, D-mannose, D- and L-arabinose, D-xylose,... 

The pure enzyme displayed the preference sucrose > raffinose > 1-kestose > nystose (in a ratio 100 24 10 6). Other carbohydrates such as turanose, cellobiose, melibiose, leucrose, methyl-a-D-glucopyranoside, and stachyose were also tested but their activity was negligible. Thus, the enzyme only recognized sugars containing a sucrose moiety in their chemical structure. The trisaccharide raffinose is equivalent to a sucrose molecule substituted at the C-6 hydroxyl group, whereas... 

The deacylation of the octaacetates of cellobiose, lactose, maltose and melibiose with Aspergillus niger lipase leads to the formation of the respective carbohydrate heptaacetates with a free anomeric OH-group at Cl in high yield1230, 232]. With... 

Katon et al. (1968) have extended their low-temperature work to other types of compounds and have given a description of the low-temperature cell they used. Other carbohydrates were examined (e.g., raffinose, sucrose, fructose, arabinose, xylose, lactose, mannose, maltose, galactose, rhamnose, cellobiose, and melibiose) as well as a noncrystalline trypsin (little or no change at the lower temperature), urea, diphenyl, stearoyl chloride, cholesterol (Fig. 3.20), cholesteryl acetate, serotonin creatinine sulfate, sodium creatinine phosphate hexahydrate, daunomycinone, carnosine, and... 

The ability of the custom-built dual gate/ion mobility quadrupole ion trap mass spectrometer equipped with electrospray ionization (ESI-DG-IM-QIT-MS) to perform mobility-filtered ion selection prior to mass analysis has been evaluated with peptides in the positive ion mode and carbohydrates in the negative ion mode. The separation of a disaccharide melibiose [a-D-Gal-(l-6)-D-Glc] and a trisaccharide rafflnose [a-D-Gal-(l-6)-a-D-Glc-(l-2)-P-D-Fru] as chlorine adducts in the negative... 

Figure 12.1. Thin layer chromatography of the separation of carbohydrates A, chromatography of mono-, di-, and trisaccharides on Whatman K5 silica gel, using four ascents of acetonitrile/H20 (85 15, v/v) (1 16), standards, (2), D-ribose, (3) D-xylose, (4) D-fruc-tose, (5) D-xylose, (6) D-galactose, (7) sucrose, (8) turanose, (9) maltose, (10) cellobiose, (11) lactose, (12) a,a-trehalose, (13) melibiose, (14) melezitose, (15) raffinose B, chromatography of maltodextrins (d.p. 1-13) on Whatman K5, using three ascents of acetoni-trile/ethyl acetate/propanol-l/H20 (85 20 50 50) C, chromatography of isomaltodextrins (d.p. 1-11) on Whatman K5, using acetonitrile/ethyl acetate/propanol-l/H20 (85 20 50 90).

Fermented carbohydrates + fructose, glucose, sucrose, raffinose d galactose, maltose, melibiose, starch — lactose, trehalose ... 

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