N-glucose

Since an enzyme is a biological catalyst and therefore merely accelerates a reaction, it cannot alter the position of equilibrium in a reversible reaction. The hydrolysis of p-methylglucoside is reversible and emulsin should therefore be capable also of synthesising this compound frc n glucose and methanol. This synthesis can actually be carried out by the action of the enzyme on glucose dissolved in an excess of methanol, the excess of the alcohol throwing the equilibrium over to the left. Owing to experimental difficulties, this reaction is not here described. 

In 159 and 163-166 the tertiary amine function is coordinated to the boron atom and transmits the electronic change due to the ester formation to the chromophore. In 160-162 the boron atom is directly connected to the chromophore. After the complexation of the saccharide, the change of the charge transfer, e.g., for 159 [249-251], or the fluorescence bands, e.g., for 160-166 [252-255], can be measured and interpreted. The most selective binding of n-glucose has been achieved with host 164 that forms a 1 1 complex with a macrocyclic structure (Scheme 1). 

Hager M, Currie F, Holmberg K (2003) Organic Reactions in Micro emulsions. 227 53 - 74 Hausler H, Stiitz AE (2001) D-Xylose (n-Glucose) Isomerase and Related Enzymes in Carbohydrate Synth esis.215 77-114... 

Chorionic gonadotropin. Follicle stimulating hormone Urea, Uric add. Bilirubin, Cortisol, n-Maimitol. n-Glucose, Sodium pyruvate, 4-hydroxy-3-methoxy mandelic add, 4-Nitro-phenol, 17 Amino adds in HQ, Angiotensin-I, Tripahnitin, Bone meal (8 elements), Bone ash (8 elements), lithium carbonate Luteinizing hormone. Thyroid stimulating hormone... 

In XLIX the chains may be long or short, linear or branched, and the n-glucose residues are mainly joined through the 1,6-position. These substances are discussed in more detail in a succeeding chapter (page 209). 

The reaction with ethyl acetoacetate has been extended to glycolaldehyde, and to carbohydrates other than n-glucose, by employing different experimental conditions it is probably applicable to aldoses in general. With d-fructose, yields are lower, but two molar proportions of water are liberated and a crystalline product results. This has a constitution similar to that of II but with the D-omhfno-tetrahydroxybutyl chain at the /3-position on the furan ring. The reaction has been applied successfully to other ketoses and... 

The Influence11 of Zinc Chloride on the Condensation of n-Glucose with Ethyl Aceloacetate in Aqueous Alcoholic Medium ... 

If the data obtained on the dehydration of the 2-(aWo-polyhydroxy-alkyl)benzimidazoles31 is considered, it is to be expected that no inversion occurs in the configuration of the carbon atom next to the furan ring. If this is so, the anhydride should have formula XXXIV. With the object of deciding this question, researches are being carried out32 on the reaction of ethyl acetoacetate with 3,6-anhydro-n-glucose and with D-altrose. 

K16. Kirkman, H. N., Glucose-6-phosphate dehydrogenase and human erythrocytes. Characteristics of G-0-P dehydrogenase from normal and primaquine sensitive erythrocytes, Nature 184, 1291 (1959). 

After removal of the toluene, the mixture was pasteurized at 80° for 5 minutes, cooled, adjusted to pH 7.8 and 2.5 volumes of 95% alcohol added. The mixture was allowed to remain at 4° for 3 hours and the precipitate, containing most of the inorganic and esterified phosphate, was removed by filtration and the alcohol was removed by distillation in vacuo at about 30°. The solution was then made up to 600 ml. and passed through columns of Amberlite IR-100 and Amberlite IR-4. This treatment removed all the electrolytes, including the remaining traces of n-glucose-l-phosphate. After washing the columns with water, the volume had increased to about three liters. The solution was concen-... 

In the absence of phosphate or n-glucose-l-phosphate, the enzyme brings about a rapid equilibration between added radioactive free D-fruc-tose and the D-fructose moiety of sucrose.4 ... 

The Physical Properties of 4-Methyl-n-glucose and Some of Its Derivatives... 

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