| malt sugar | <biochemistry> Disaccharide intermediate of the breakdown of starch, glucose _(1-4) glucose. Fermentable substrate in brewing. (20 Mar 1998) |
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| gelatin sugar | <amino acid, physiology> The simplest amino acid. It is a common residue in proteins, especially collagen and elastin and is not optically active. It is also a major inhibitory neurotransmitter in spinal cord and brainstem of vertebrate central nervous system. (18 Nov 1997) |
| manna sugar | A medication given to reduce brain swelling and elevated intracranial pressure. Also used to temporarily disrupt the blood-brain barrier prior to some forms of chemotherapy. (16 Dec 1997) |
| maple sugar | Sucrose extracted from the sap of the sugar maple, Acer saccharinum. Synonym: saccharum canadense. (05 Mar 2000) |
| reducing sugar | A sugar, such as glucose in the urine, that has the property of reducing various inorganic ions, notably cupric ion to cuprous ion. (05 Mar 2000) |
| CDP-sugar | <abbreviation> Cytidine diphosphosugar. (05 Mar 2000) |
| vitamin A2 aldehyde | 3-Dehydroretinaldehyde;dehydroretinol with -CHO instead of -CH2OH at the terminal carbon of the side chain. Synonym: retinene-2, vitamin A2 aldehyde. (05 Mar 2000) |
| vitamin A aldehyde | <chemical> A carotenoid constituent of visual pigments. It is the oxidised form of retinol which functions as the active component of the visual cycle. It is bound to the protein opsin forming the complex rhodopsin. When stimulated by visible light, the retinal component of the rhodopsin complex undergoes isomerization at the 11-position of the double bond to the cis-form; this is reversed in "dark" reactions to return to the native trans-configuration. Chemical name: Retinal (03 Jul 1999) |
| pectin sugar | D-arabinose. See: arabinose. (05 Mar 2000) |
| glyceric aldehyde | <biochemistry> A type of aldose with the chemical formula C3H6O3. This molecule is used as the reference molecule for handedness (L, lefthanded, or D, right-handed stereochemical configuration) in amino acids, carbohydrates, etc. (09 Oct 1997) |
| Gomori's aldehyde fuchsin stain | <technique> A stain used to demonstrate beta cells of the pancreas, storage form of thyrotrophic hormone in beta cells of the anterior pituitary, hypophyseal neurosecretory substance, mast cells, granules, elastic fibres, sulfated mucins, and gastric chief cells. (05 Mar 2000) |
| grape sugar | See: d-glucose. Invert sugar, a mixture of equal parts of d-glucose and d-fructose produced by hydrolysis of sucrose (inversion). (05 Mar 2000) |
| methyl aldehyde | <chemical> Commonly used fixative and antibacterial agent. As a fixative it is cheap and tends to cause less denaturation of proteins than does glutaraldehyde, particularly if used in a well buffered solution (buffered formalin, formal saline). Old formaldehyde solutions usually contain cross linking contaminants and it is therefore often preferable to used a formaldehyde generating agent such as paraformaldehyde. Formalin fumes, particularly in conjunction with hydrochloric acid vapour, are potently carcinogenic. (20 Jun 2000) |
| cinnamic aldehyde | 3-phenylpropenal;chief constituent of cinnamon oil. Synonym: cinnamic aldehyde. (05 Mar 2000) |
| phosphoenolpyruvate sugar phosphotransferase system | <enzyme> The bacterial sugar phosphotransferase system (pts) that catalyses the transfer of the phosphoryl group from phosphoenolpyruvate to its sugar substrates (the pts sugars) concomitant with the translocation of these sugars across the bacterial membrane. The phosphorylation of a given sugar requires four proteins, two general proteins, enzyme I and hpr and a pair of sugar-specific proteins designated as the enzyme II complex. The pts has also been implicated in the induction of synthesis of some catabolic enzyme systems required for the utilization of sugars that are not substrates of the pts as well as the regulation of the activity of adenylate cyclase. Registry number: EC 2.7.1.- (12 Dec 1998) |