| beta-APN | beta-amino-proprionitrile |
|---|---|
| beta-APP | Beta-amyloid protein precursor |
| beta-AR | Beta-adrenergic receptor |
| beta-AR | Beta-adrenoceptor |
| beta-ARK | beta 2-adrenergic receptor kinase |
| beta-ATP | Beta-adenosine triphosphate |
| beta-BuTX | Beta-Bungarotoxin |
| beta-CCE | beta carboline-3-carboxylate |
| beta-CCM | Methyl-beta-carboline-3-carboxylate |
| beta-CD | Beta-cyclodextrin |
| beta-cystathionase | <enzyme> An enzyme catalyzing the hydrolysis of l-cystathionine to pyruvate, l-homocysteine, and NH3. See: cystathionine gamma-lyase. Synonym: beta-cystathionase, cystine lyase. (05 Mar 2000) |
|---|---|
| beta-d thalassaemia | Thalassaemia due to a gene that depresses synthesis of both beta-and d-globin chains by the chromosome bearing the abnormal gene. Heterozygous state: thalassaemia minor with Hb F comprising 5 to 30% of total haemoglobin but distributed unevenly among cells, Hb A2 reduced or normal. Homozygous state: moderate anaemia with only Hb F present, no Hb A or Hb A2. Synonym: F thalassaemia. (05 Mar 2000) |
| beta-D-fucosidase | <enzyme> Catalyses hydrolysis of terminal non-reducing beta-d-fucose residues in beta-d-fucosides; also hydrolyzes beta-d-galactosides Registry number: EC 3.2.1.38 Synonym: beta-d-fucoside fucohydrolase (26 Jun 1999) |
| beta-d-galactosidase | A sugar-splitting enzyme that catalyses the hydrolysis of lactose into d-glucose and d-galactose, and that of other beta-d-galactosides; it also catalyses galactotransferase reactions; a deficiency of beta-d -galactosidase leads to problems in the intestinal digestion of lactose; used in the production of milk products for adults who do not have the intestinal enzyme; a defect of one isozyme of beta-d-galactosidase is associated with Morquio's syndrome type B. Compare: lactase persistence, lactase restriction. Synonym: lactase. (05 Mar 2000) |
| beta-D-galactoside alpha 2-6-sialyltransferase | <enzyme> Catalyses the reaction of cmp-n-acetylneuraminate and galactosylglycoprotein to yield cmp and n-acetylneuraminylgalactosylglycoprotein; cd75 and cd75w antigen were removed as sys - it is not equivalent to the enzyme. Registry number: EC 2.4.99.1 Synonym: cmp-n-acetylneuraminate-d-galactosyl-glycoprotein n-acetylneurainyltransferase, cmp-n-acetylneuraminate-beta-galactoside alpha-2,6-sialyltransferase, beta-galactosyl(1-4)n-acetylglucosaminide alpha(2-6)-sialyltransferase, gal-glcnac(2-6)-sialyltransferase, cmp-n-acetylneuraminic acid-lactose sialytransferase, cmp-acetylneuraminate galactoside (alpha 2-6)-sialyltransferase, cmp-n-acetylneuraminate-galactosylglycoprotein sialyltransferase, alpha 2-6-sialyltransferase, cmp-sialic acid-n-acetyllactosaminide alpha (2-6)-sialyltransferase, cmp-neuac-galactoside (alpha 2-6)-sialyltransferase, gal-1-4-glcnac alpha(2-6)-sialyltransferase, siat-1, beta-galctoside alpha2,6-sialyltransferase (26 Jun 1999) |
| beta-d-glucosidase | A glucohydrolase similar to alpha-d-glucosidase, but attacking beta-glucosides and releasing beta-d-glucose. Synonym: amygdalase, cellobiase, gentiobiase. (05 Mar 2000) |
| beta-d-glucuronidase | <enzyme> An enzyme catalyzing the hydrolysis of various beta-d-glucuronides, liberating free d-glucuronic acid and an alcohol; a deficiency of this enzyme is associated with Sly syndrome. Synonym: glusulase, glycuronidase. (05 Mar 2000) |
| beta-d-glucuronidase deficiency | A rare deficiency of beta-d-glucuronidase; an autosomal recessive disorder with several allelic forms, characterised by abnormal mucopolysaccharide metabolism leading to progressive mental deterioration, splenic and hepatic enlargement, and dysostosis multiplex. Synonym: mucopolysaccharidase. (05 Mar 2000) |
| beta-D-mannosidase | <enzyme> Catalyses hydrolysis of terminal, non-reducing beta-d-mannose residues in beta-d-mannosides Registry number: EC 3.2.1.25 Synonym: mannanase, beta-mannosidase, mana gene product (26 Jun 1999) |
| beta-DNA | <molecular biology> The normal form of DNA found in organisms, which exists as a right-handed helix. (09 Oct 1997) |
| beta-endorphin | <chemical> A peptide consisting of amino acid sequence 61-91 of the endogenous pituitary hormone beta-lipotropin. The first four amino acids show a common tetrapeptide sequence with methionine- and leucine enkephalin. The compound shows opiate-like activity. Injection of beta-endorphin induces a profound analgesia of the whole body for several hours. This action is reversed after administration of naloxone. Chemical name: beta-Endorphin (12 Dec 1998) |
| beta-farnesene | 7,11-Dimethyl-3-methylene-1,6,10-dodecatriene;one of the two isomers (trans) that occurs in the alarm pheromone of some aphids and also in various essential oils. (05 Mar 2000) |
| beta-farnesene synthase | <enzyme> Catalyses conversion of farnesyl diphosphate to beta-farnesene; genbank af024615 Registry number: EC 3.6.1.- (26 Jun 1999) |
| beta-fructofuranosidase | Beta-h-Fructosidase;an enzyme hydrolyzing beta-d-fructofuranosides and releasing free d-fructose; if the substrate is sucrose, the product is d-glucose plus d-fructose (invert sugar); invert sugar is more easily digestible than sucrose. Synonym: invertase, invertin, saccharase. (05 Mar 2000) |
| beta-galactanase | <enzyme> Appears around day 7 of embryo development of the mollusc pomacea sp; responsible for the degradation of acidic beta-galactan to galactose and di- and tri-galactosides; see also exo-1,4-beta-galactanase and endo-1,4-beta galactanase Registry number: EC 3.2.1.- (26 Jun 1999) |
| xyloglucan endo(1-4)-beta-D-glucanase | <enzyme> Hydrolyzes only xyloglucans Registry number: EC 3.2.1.- Synonym: xyloglucanase (26 Jun 1999) |
|---|---|
| xylosylprotein 4-beta-galactosyltransferase | <enzyme> Catalyses the second glycosyl transfer reaction in the assembly of the dermatan sulfate chain Registry number: EC 2.4.1.133 Synonym: galactosyltransferase i (26 Jun 1999) |
| short-chain beta-hydroxyacyl-CoA dehydrase | <enzyme> Forms trans-2-enoyl-CoA; maximal activity with trans-2-hexenoyl-CoA, followed by crotonyl-CoA; not the same as EC 4.2.1.17 Registry number: EC 4.2.1.- Synonym: beta-hydroxybutyryl-CoA dehydrase, short-chain beta-hydroxyacyl-coenzyme a dehydrase (26 Jun 1999) |
| hyper-beta-alaninaemia | Elevated levels of beta-alanine in the serum; believed to be due to a deficiency of beta-alanine:pyruvate aminotransferase; leads to impaired CNS function. (05 Mar 2000) |
| hyper-beta-aminoisobutyric aciduria | Elevated levels of beta-aminoisobutyric acid in the urine; believed to be due to a deficiency of liver R-beta-aminoisobutyrate:pyruvate aminotransferase. (05 Mar 2000) |
| N6-acetyl-beta-lysine transaminase | <enzyme> Involved in oxidative catabolism of lysine by candida maltosa; forms 2-keto-6-acetamidocaproate Registry number: EC 2.6.1.65 Synonym: n6-acetyllysine transaminase, acl-at, n6-acetyllysine 2-oxoglutarate aminotransferase (26 Jun 1999) |
| N-acetylglucosamine 4-beta-galactosyltransferase | <enzyme> From schistosoma mansoni Registry number: EC 2.4.1.- Synonym: glcnac-4-galactosyltransferase (26 Jun 1999) |
| N-acetyllactosaminide beta-1,6-N-acetylglucosaminyltransferase | <enzyme> From novikoff ascites tumour cells; asialo-alpha 1-acid glycoprotein acts as acceptor; involved in blood group I antigen synthesis Registry number: EC 2.4.1.150 Synonym: udpgnac 1-6 transferase, udp n-acetyllactosaminide beta-1-6 n-acetylglucosaminyl transferase (26 Jun 1999) |
| N-acetylneuraminylgalactosylglucosylceramide beta-1,4-N-acetylgalactosaminyltransferase | <enzyme> Requires mn2+; only substances containing sialic acid residues can act as acceptors; bovine fetuin is the best aceptor tested Registry number: EC 2.4.1.165 Synonym: neuacgal-1,4-galnactransferase, udp-galnac-neuacalpha2,3galbeta-r(galnac to gal)beta1,4-n-acetylgalactosaminyltransferase (26 Jun 1999) |
| N-benzoyl-beta-D-glucosaminidase | <enzyme> Splits 4-nitrophenyl-2-benzamido-2-deoxy-beta-d-glucopyranoside from liver of the scallop mizuhopecten yessoensis Registry number: EC 3.2.1.- (26 Jun 1999) |
| neocarratetraose 4-O-monosulfate beta-hydrolase | <enzyme> Hydrolyzes the beta-glycoside linkage to give neocarrabiose and neocarrabiose 4-o-sulfate Registry number: EC 3.2.1.- Synonym: nctms hydrolase (26 Jun 1999) |
| steroid 11 beta-monooxygenase | <enzyme> A steroid hydroxylase system found in adrenal tissues. It catalyses the 11-hydroxylation of steroids in the presence of molecular oxygen and consists of an NADPH-specific flavoprotein, a non-haem iron protein, and cytochrome p-450. Its deficiency is a cause of congenital adrenal hyperplasia (adrenal hyperplasia, congenital). Chemical name: Steroid, reduced-adrenal-ferredoxin:oxygen oxidoreductase (11 beta-hydroxylating) Registry number: EC 1.14.15.4 (12 Dec 1998) |
| steroid 15-beta-hydroxylase | <enzyme> Contains p-450 and ferredoxin; from bacillus megaterium Registry number: EC 1.14.99.- Synonym: cytochrome p-450 15 beta-hydroxylase, p-450 (15-beta), steroid-15 beta-monooxygenase, cytochrome p-450meg, cytochrome p4502c12, cyp2c12 protein (26 Jun 1999) |
| sterol 3-beta-glucosyltransferase | <enzyme> A plasma membrane-bound enzyme that catalyses the glucosylation of plant sterols; reaction: sterol + udp-glucose = steryl-3-beta-glucoside + udp Registry number: EC 2.4.1.173 Synonym: udp-glucose sterol beta-d-glucosyltransferase, udpg-sgtase, udp-glucose-sterol-beta-glucosyltransferase (26 Jun 1999) |
| Sulfolobus solfataricus beta-glycosidase | <enzyme> Has broad specificity against beta(1-4), beta(1-3), and beta(1-6)-o-glucosides and hydrolyzes oligosaccharides from the non-reducing end; amino acid sequence given in first source;swiss-prot p22498 Registry number: EC 3.2.1.- Synonym: ssbeta-gly, beta-glycosidase, sulfolobus (26 Jun 1999) |
Synonyms : Acid Invertase, Invertase, Saccharase, Sacrosidase, Sucraid, Sucrose 6-Phosphate Hydrolase, beta-Fructosidase, 6-Phosphate Hydrolase, Sucrose, Hydrolase, Sucrose 6-Phosphate, Invertase, Acid, Sucrose 6 Phosphate Hydrolase, beta D Fructofuranosidase
Synonyms : Dairyaid, Lactaid, Lactogest, Lactrase, McNeil Brand of beta-Galactosidase, Rivex Brand of beta-Galactosidase, Sunrise Brand of beta-Galactosidase, Tanta Brand of beta-Galactosidase, Thompson Brand of beta-Galactosidase, beta-D-Galactosidase, beta-Galactosidases
Synonyms : Beta(1)CA Globulin, Beta-Globulin, Beta Globulin, Beta Globulins
Synonyms : beta Glucans
Synonyms : Amygdalase, Cellobiase, Emulsion beta-D-Glucosidase, Gentiobiase, Emulsion beta D Glucosidase, beta Glucosidase, beta-D-Glucosidase, Emulsion
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| beta sheet |
The β sheet (also β-pleated sheet) is a commonly occurring form of regular secondary structure in proteins, first proposed by Linus Pauling and Robert Corey in 1951. It consists of two or more amino acid sequences within the same protein that are arranged adjacently and in parallel, but with alternating orientation such that hydrogen bonds can form between the two strands. The amino acid chain is almost fully extended throughout a β strand. ...
Ãâó: en.wikipedia.org/wiki/Beta_sheet
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|---|---|
| beta-lactam |
A beta-lactam (β-lactam) is a lactam with a heteroatomic ring structure, consisting of three carbon atoms and one nitrogen atom (Fig. 1). The beta-lactam ring is part of several antibiotics, such as penicillin, which are therefore also called beta-lactam antibiotics. These antibiotics work by inhibiting the bacterial cell wall synthesis. This has a lethal effect on bacteria, especially on Gram-positive ones. ...
Ãâó: en.wikipedia.org/wiki/Beta-lactam
|
| beta. |
Beta (upper case Β, lower case β) is the second letter of the Greek alphabet. It seems to have come from the Phoenician word "beth" that means "house" or "tent". The shape of B represented that thing itself (tent), the usual house of the Semites. In the Ancient Greek language, it was pronounced , but in Modern Greek is pronounced . In the system of Greek numerals it has a value of 2. ...
Ãâó: en.wikipedia.org/wiki/β
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| betaine |
Trimethylglycine (Betaine) functions very closely with choline, folic acid, vitamin B12, and a form of the amino acid methionine known as S-adenosylmethionine (SAMe). All of these compounds function as "methyl donors." They carry and donate methyl molecules to facilitate necessary chemical processes. The donation of methyl groups is very important to proper liver function, cellular replication, and detoxification reactions. ...
Ãâó: en.wikipedia.org/wiki/Betaine
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| beta carotene |
A vitamin A precursor. Beta carotene belongs to the family of fat-soluble vitamins called carotenoids.
Ãâó: www.stjude.org/glossary
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