Sucrose systematic name

Sucrose is dextro-rotatory. Fructose shows a laevo-rotation greater in magnitude than the dextro-rotation shown by glucose. Hence as the hydrolysis of sucrose proceeds, the dextro-rotation gradually falls to zero and the solution finally shows a laevo-rotation. This hydrolysis is therefore sometimes called inversion and so the enzyme which catalyses the reaction is known as " invertase. Its more systematic name is, however, sucrase. 

The systematic names of trehalose, sucrose, maltose and lactose have been given... 

Another very valuable glycosyltransferase for the construction of well-defined polysaccharides is glucansucrase (dextransucrase systematic name sucrose (1 6)-a-D-glucan 6-a-D-glucosyltransferase EC 2.4.1.5). 

Dijkhuizen and coworkers identified and characterized a Lactobacillus levansucrase (systematic name sucrose [6)-P-D-fructofuranosyl-(2 ]n a-D-glucopyranoside 6-P-D-fructosyltransferase EC 2.4.1.10) from L. reuteri strain 121, which could produce a high molecular weight levan polysaccharide from fructose [207]. 

In contrast, most people are fond of and tolerate sucrose (see Figure 2). Sucrose is produced by plant cells it is one of the major products of photosynthesis. It contains glucose and fructose molecules linked across the anomeric carbons of both (the C-1 of glucose and the C-2 of fructose). The systematic name is a-D-glucopyranosyl-(1 4)-j8-D-fructofuranoside. Because it lacks a free anomeric carbon, sucrose is a nonreducing sugar. Sucrose is hydrolyzed in the intestine by the pancreatic enzyme sucrase. 

The substance acted on by an enzyme is called the substrate. Sucrose is the substrate of the enzyme sucrase. Common names for enzymes are formed by adding the suffix -ase to the root of the substrate name. Note, for example, the derivations of mal-tase, sucrase, and lactase from maltose, sucrose, and lactose. Many enzymes, especially digestive enzymes, have common names such as pepsin, rennin, trypsin, and so on. These names have no systematic significance. 

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