| hexopyranoside:cytochrome c oxidoreductase | <enzyme> Hexopyranoside:cytochrome c oxidoreductase forms 3-keto hexopyranoside Registry number: EC 1.1.2.- (26 Jun 1999) |
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| hexosamine | The amine derivative (NH2 replacing OH) of a hexose; e.g., glucosamine. (05 Mar 2000) |
| hexosaminidase | <enzyme> Enzyme involved in the metabolism of gangliosides. Deficient in Tay Sachs disease. (18 Nov 1997) |
| hexosaminidases | <enzyme> Enzymes that catalyze the hydrolysis of n-acylhexosamine residues in n-acylhexosamides. Hexosaminidases also act on glucosides, galactosides, and several oligosaccharides. Registry number: EC 3.2.1.- (12 Dec 1998) |
| hexosans | Polysaccharides with the general formula (C6H10O5)x which, on hydrolysis, yield hexoses; included are glucosans (glucans), mannans, galactans, and fructosans (fructans). Synonym: polyhexoses. (05 Mar 2000) |
| hexose | Monosaccharide containing six carbon atoms, for example glucose, galactose, mannose. (18 Nov 1997) |
| hexose monophosphate pathway | <biochemistry> A pathway of hexose oxidation in which glucose-6-phosphate undergoes two successive oxidations by NADP, the final one being an oxidative decarboxylation to form a pentose phosphate. Diverges from this when glucose-6-phosphate is oxidized to ribose 5 phosphate by the enzyme glucose-6 phosphate dehydrogenase. This step reduces NADP to NADPH, generating a source of reducing power in cells for use in reductive biosyntheses. In plants, part of the pathway functions in the formation of hexoses from carbon dioxide in photosynthesis. Also important as source of pentoses, for example for nucleic acid biosynthesis. This pathway is the main metabolic pathway in neutrophils, congenital deficiency in the pathway produces sensitivity to infection. Alternative metabolic route to Embden Meyerhof pathway for breakdown of glucose. (18 Nov 1997) |
| hexose monophosphate shunt | The main metabolic pathway in activated neutrophils, rendering them relatively insensitive to inhibitors of oxidative phosphorylation. Congenital deficiency of the first enzyme in the shunt, glucose 6 phosphate dehydrogenase, produces a sensitivity to infection similar to that seen in chronic granulomatous disease. (18 Nov 1997) |
| hexose monphosphate pathway | A metabolic pathway present in a wide range of prokaryotic and eukaryotic microorganisms as well as in plants and animals, it involves the oxidative decarboxylation of glucose-6-phosphate, via 6 phosphogluconate, to ribulose 5-phosphate, followed by a series of reversible, non-oxidative interconversions whereby hexose and triose phosphates are formed from pentose phosphates. (09 Oct 1997) |
| hexose phosphatase | <enzyme> May be an aspect of acid phosphatase, EC 3.1.3.2 Registry number: EC 3.1.3.- (26 Jun 1999) |
| hexose phosphate synthetase | <enzyme> Ribulosephosphate formaldehyde gives d-erythro-l-glycero-3-hexulose Registry number: EC 4.1.2.- Synonym: 3-hexulose phosphate synthase, d-arabino-3-hexulose 6-phosphate formaldehyde-lyase, 3-hexulosephosphate synthase, d-arabino-3-hexulose-6-phosphate-lysase, hexulose-6-phosphate synthase, hump synthase (26 Jun 1999) |
| hexose-1-phosphate uridylyltransferase | <enzyme> An enzyme that catalyses the transfer of ump from udpglucose to galactose 1-phosphate, forming udpgalactose and glucose 1-phosphate. Deficiency in this enzyme is the major cause of galactosaemia. Chemical name: UDPglucose:alpha-D-galactose-1-phosphate uridylyltransferase Registry number: EC 2.7.7.12 (12 Dec 1998) |
| hexoseaminidase a | Deficiency of this enzyme causes Tay-Sachs disease, a progressive, fatal neurologic disorder concentrated in people of european jewish (ashkenazi) descent. (12 Dec 1998) |
| hexosebisphosphatase | <biochemistry> This key intermediate in glycolysis and gluconeogenesis (a hexose diphosphate) was discovered by Arthur Harden and William Young in 1905. In the third step of glycolysis, fructose 6-phosphate and ATP are converted to fructose 1,6-bisphosphate and ADP with the aid of phosphofructokinase. In step 4, fructose 1,6 bisphosphate (with the aid of aldolase) is cleaved into duhydroxyacetone phosphate and glyceraldehyde 3-phosphate. Synonym: hexosebisphosphatase, hexosediphosphatase. (08 Mar 2000) |
| hexosephosphate isomerase | <enzyme> An enzyme that catalyses the reversible interconversion of d-fructose 6-phosphate and d-glucose-6-phosphate; a part of glycolysis and gluconeogenesis; glucosephosphate isomerase deficiency is an inherited disorder resulting in liver glycogenesis and haemolytic anaemia. Synonym: hexosephosphate isomerase, phosphohexomutase, phosphohexose isomerase. (05 Mar 2000) |
| hexane |
An alkane having the formula C6H14. Flash point -9
출처: www.fire.org.uk/glossary.htm
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| hexadecimal |
Representation of numbers using base 16.
출처: www.dvd-makers.com/public/479.cfm
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| Hexapoda |
(hexa = six; poda = foot) another term for the class of animals that includes the insects.
출처: scarab.msu.montana.edu/historybug/glossary.htm
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| hex- |
A number of representation system of base 16 and the digit symbols from 0 to 9 and A to F. The hex number system is very useful in cases where computer words are composed of multiples of four bits (that is, 4 bit words, 8 bit words, 16 bit words, and so on).
출처: www.control.co.kr/dic/dic-h.htm
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| hexadecimal |
A number of representation system of base 16 and the digit symbols from 0 to 9 and A to F. The hex number system is very useful in cases where computer words are composed of multiples of four bits (that is, 4 bit words, 8 bit words, 16 bit words, and so on).
출처: www.control.co.kr/dic/dic-h.htm
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