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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

phenakistoscope
<instrument> A revolving disk on which figures drawn in different relative attitudes are seen successively, so as to produce the appearance of an object in actual motion, as an animal leaping, etc, in consequence of the persistence of the successive visual impressions of the retina. It is often arranged so that the figures may be projected up …

phenanthrene nucleus
Misnomer for tetracyclic steroid nucleus. ... (05 Mar 2000) ...

phenarsenamine
Synonym for arsphenamine ... <chemical> Pharmacological action: antitreponemal agents. ... Chemical name: Phenol, 4,4'-(1,2-diarsenediyl)bis(2-amino-, dihydrochloride ... (12 Dec 1998) ...

phenarsone sulfoxylate
Sodium 3-amino-4-hydroxyphenylarsonate-N-methanolsulfoxylate;a pentavalent arsenical used in trichomonal vaginitis. ... (05 Mar 2000) ...

phenate
A salt or ester of phenol (carbolic acid). ... Synonym: carbolate. ... (05 Mar 2000) ...

phenazacillin
Synonym for hetacillin ... 6-(2,2-Dimethyl-5-oxo-4-phenyl-1-imidazolidinyl)penicillanic acid;a semisynthetic penicillin compound with antimicrobial properties. ... Synonym: phenazacillin. ... (05 Mar 2000) ...

phenazocine
<chemical> An opioid analgesic with actions and uses similar to morphine. ... Pharmacological action: analgesics, opioid, narcotics. ... Chemical name: 2,6-Methano-3-benzazocin-8-ol, 1,2,3,4,5,6-hexahydro-6,11-dimethyl-3-(2-phenylethyl)- ... (12 Dec 1998) ...

phenazoline hydrochloride
Synonym for antazoline hydrochloride ... 2-(N-benzylanilino-methyl)-2-imidazoline hydrochloride;a histamine-antagonizing agent used in treating allergy; also available as antazoline hydrochloride phosphate. ... Synonym: phenazoline hydrochloride. ... (05 Mar 2000) ...

phenazopyridine
<chemical> A local anaesthetic that has been used in urinary tract disorders. Its use is limited by problems with toxicity (primarily blood disorders) and potential carcinogenicity. ... Pharmacological action: anaesthetics, local. ... Chemical name: 2,6-Pyridinediamine, 3-(phenylazo)- ... (12 Dec 1998) ...

phenazopyridine hydrochloride
2,6-Diamino-3-(phenylazo)pyridine hydrochloride;an orally administered urinary tract analgesic. ... (05 Mar 2000) ...

phencyclidine
<drug> Anaesthetic and drug of a kind that can produce marked behavioural effects. Interacts with the NMDA receptor. ... (31 Dec 1997) ...

phencyclidine abuse
The misuse of phencyclidine with associated psychological symptoms and impairment in social or occupational functioning. ... (12 Dec 1998) ...

phendimetrazine tartrate
(d-3,4-Dimethyl-2-phenylmorpholine)-bitartrate;an anorexic agent. ... (05 Mar 2000) ...

phenelzine
<drug> This drug, which is a strong monoamine oxidase (MAO) inhibitor, is used to treat people with mixed anxiety and depression. ... (31 Dec 1997) ...

phenelzine sulfate
(2-Phenethyl) hydrazine sulfate;a monoamine oxidase inhibitor used as an antidepressant. ... (05 Mar 2000) ...

phenetamine
2-(Cyclohexylbenzyl)N,N,N',N '-tetraethyl-1,3-propanediamine;an intestinal antispasmodic. ... Synonym: phenacyclamine. ... (05 Mar 2000) ...

phenetharbital
N-Phenylbarbital; 5,5-diethyl-1-phenylbarbituric acid;an obscure anticonvulsant agent. ... (05 Mar 2000) ...

phenethicillin potassium
A penicillin preparation that is stable in gastric acid and is rapidly but only partially absorbed from the gastrointestinal tract. ... Synonym: alpha-phenoxyethylpenicillin potassium, penicillin B. ... (05 Mar 2000) ...

phenethyl alcohol
Synonym for phenylethyl alcohol ... <chemical> An antimicrobial, antiseptic, and disinfectant that is used also as an aromatic essence and preservative in pharmaceutics and perfumery. ... Pharmacological action: anti-infective agents, local, disinfectants, preservatives, pharmaceutical. ... Chemical name: Benzeneethanol ... (12 Dec 1998) ...

phenethylamines
A group of compounds that are derivatives of beta- aminoethylbenzene which is structurally and pharmacologically related to amphetamine. ... (12 Dec 1998) ...

phenetic classification
<zoology> Classification based on degree of overall similarity. ... (09 Jan 1998) ...

phenetidine
<chemical> P-aminophenyl ethyl ether. Used in the manufacture of acetophenetidin. ... Chemical name: Benzenamine, 4-ethoxy- ... (12 Dec 1998) ...

phenetidine N-acetyltransferase
<enzyme> Acts on unalkylated arylamines; not the same as EC 2.3.1.5 ... Registry number: EC 2.3.1.- ... (26 Jun 1999) ...

phenetsal
Synonym for acetaminosalol ... Salicylic acid ester of acetyl-p-aminophenol;used as an analgesic, antipyretic, and intestinal antiseptic. ... Synonym: phenetsal. ... (05 Mar 2000) ...

pheneturide
Phenylethylacetylurea; (2-phenylbutyryl)urea;an antiepileptic similar in action to phenacemide. ... (05 Mar 2000) ...

phenformin
<chemical> A biguanide hypoglycaemic agent with actions and uses similar to those of metformin. Although it is generally considered to be associated with an unacceptably high incidence of lactic acidosis, often fatal, it is still available in some countries. ... Pharmacological action: hypoglycaemic agents. ... Chemical name: Imidodicarbonimidi …

phenformin hydrochloride
1-Phenylbiguanide monohydrochloride;an oral hypoglycaemic agent no longer used in the U.S. Because of the high incidence of fatal lactic acidosis associated with its use. ... (05 Mar 2000) ...

phenglutarimide hydrochloride
The hydrochloride of alpha-2-diethylaminoethyl-alpha-phenylglutarimide; an antihistaminic used to decrease or prevent motion sickness, and to control Meniere's disease and vomiting. ... (05 Mar 2000) ...

phengophobia
<psychology> Morbid fear of daylight. ... Origin: G. Phengos, daylight, + phobos, fear ... (05 Mar 2000) ...

phenicarbazide
1-Phenylsemicarbazide;an antipyretic. ... (05 Mar 2000) ...

phenindamine tartrate
2-Methyl-9-phenyltetrahydro-1-pyridindene tartrate;an antihistaminic. ... (05 Mar 2000) ...

phenindione
<chemical> An indandione that has been used as an anticoagulant. Phenindione has actions similar to warfarin, but it is now rarely employed because of its higer incidence of severe adverse effects. ... Pharmacological action: anticoagulant. ... Chemical name: 1H-Indene-1,3(2H)-dione, 2-phenyl- ... (12 Dec 1998) ...

pheniramine
<chemical> Histamine h1 antagonist with little sedative action. It is used in hay fever, rhinitis, allergic dermatoses, and pruritus. ... Pharmacological action: anti-allergic agents, antipruritics, histamine h1 antagonists. ... Chemical name: 2-Pyridinepropanamine, N,N-dimethyl-gamma-phenyl- ... (12 Dec 1998) ...

pheniramine maleate
1-phenyl-1-(2-pyridyl)-3-dimethylaminopropane maleate;an antihistaminic. ... Synonym: prophenpyridamine maleate. ... (05 Mar 2000) ...

phenmethylol
Synonym for benzyl alcohol ... <chemical> A colourless liquid with a sharp burning taste and slight odour. It is used as a local anaesthetic and to reduce pain associated with lidocaine injection. Also, it is used in the manufacture of other benzyl compounds, as a pharmaceutic aid, and in perfumery and flavoring. ... Pharmacological action: ana …

phenmetrazine
<chemical> A sympathomimetic drug used primarily as an appetite depressant. Its actions and mechanisms are similar to dextroamphetamine. ... Pharmacological action: adrenergic agents, adrenergic uptake inhibitors, appetite depressants, central nervous system stimulants, dopamine agents, dopamine uptake inhibitors, sympathomimetic. ... Chemical …

phenmetrazine hydrochloride
2-Phenyl-3-methyltetrahydro-1,4-oxazine hydrochloride;an anorexic agent with sympathomimetic properties. ... (05 Mar 2000) ...

pheno-
1. Combining form denoting appearance. ... 2. In chemistry, combining form denoting derivation from benzene (phenyl-). ... Origin: fr. G. Phaino, to appear, show forth ... (05 Mar 2000) ...

phenobarbital
<chemical> A barbiturate used as a sedative and an anticonvulsant. It was used as an anti-anxiety agent but has been supplanted by benzodiazepines for that purpose. It may also be useful in the treatment of neonatal hyperbilirubinaemia and in the symptomatic treatment of opiate withdrawal in mothers and infants. ... Pharmacological action: ant …

phenobarbital elixir
A palatable, coloured hydroalcoholic (12-15% alcohol) mixture containing 20 mg of phenobarbital per 5 ml (teaspoonful); useful in administering the drug to persons who have difficulty swallowing tablets; used as an anticonvulsant and sedative. ... (05 Mar 2000) ...

phenobarbitol
<drug> A sedating medication used to control seizures. ... (31 Dec 1997) ...

phenobutiodil
2-(2,4,6-Triiodophenoxy)butyric acid;a radiographic contrast medium for cholecystography. ... (05 Mar 2000) ...

phenocopy
<biology, genetics> An environmentally produced phenotype simulating the effect of a particular genotype. ... (18 Nov 1997) ...

phenol
<chemistry> ... 1. A white or pinkish crystalline substance, C6H5OH, produced by the destructive distillation of many organic bodies, as wood, coal, etc, and obtained from the heavy oil from coal tar. ... It has a peculiar odour, somewhat resembling creosote, which is a complex mixture of phenol derivatives. It is of the type of alcohols, and i …

phenol coefficient
Synonym for Rideal-Walker coefficient ... A figure expressing the disinfecting power of any substance; it is obtained by dividing the figure indicating the degree of dilution of the disinfectant that kills a microorganism in a given time by that indicating the degree of dilution of phenol which kills the organism in the same space of time under simi …

phenol glucuronosyltransferase
<enzyme> Also catalyses the glucuronidation of 1-naphthol, 4-methylumbelliferone, 4-nitrophenol and related cpds; encoded by ugt1 complex ... Registry number: EC 2.4.1.- ... Synonym: phenol gcstransferase, phenol udp-glucuronosyltransferase, ugt1a1, rat, 1-naphthol udp-glucuronosyltransferase ... (26 Jun 1999) ...

phenol oxidase
Synonym for laccase ... <enzyme> An enzyme oxidizing benzenediols to semiquinones with O2. ... Synonym: monophenol monooxygenase, phenol oxidase, phenolase, polyphenol oxidase, urushiol oxidase. ... (05 Mar 2000) ...

phenol red
Synonym for phenolsulfonphthalein ... <chemical> 4,4'-(3h-2,1-benzoxathiol-3-ylidene)bisphenol s,s-dioxide. Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems. ... Pharmacological action: indicators and reagents, phthalein dyes. ... Chemical name: P …

phenolaemia
The presence of phenols in the blood. ... Origin: phenol + G. Haima, blood ... (05 Mar 2000) ...

phenolase
Synonym for laccase ... <enzyme> An enzyme oxidizing benzenediols to semiquinones with O2. ... Synonym: monophenol monooxygenase, phenol oxidase, phenolase, polyphenol oxidase, urushiol oxidase. ... (05 Mar 2000) ...

phenolated
Impregnated or mixed with phenol. ... Synonym: carbolated. ... (05 Mar 2000) ...

phenology
The study of the biological rhythms of plants and animals, particularly those rhythms showing seasonal variation. ... Origin: G. Phaino, to appear, + logos, study ... (05 Mar 2000) ...

phenolphthalein
Obtained by the action of phenol on phthalic anhydride; used as a hydrogen ion indicator and as a laxative. ... (05 Mar 2000) ...

phenolphthaleins
<chemical> A family of 3,3-bis(p-hydroxyphenyl)phthalides). They are used as indicators, cathartic, and dyes. ... Pharmacological action: cathartic, indicators and reagents, phthalein dyes. ... (12 Dec 1998) ...

phenolsulfonphthalein
<chemical> 4,4'-(3h-2,1-benzoxathiol-3-ylidene)bisphenol s,s-dioxide. Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems. ... Pharmacological action: indicators and reagents, phthalein dyes. ... Chemical name: Phenol, 4,4'-(3H-2,1-benzoxathiol-3-yl …

phenolsulfonphthalein test
An obsolete test for renal function; after the patient has drunk a glass or two of water, 1 ml of a 0.6% solution of dye is injected hypodermically; the time between this injection and the appearance of a pink tinge in the urine as it falls into an alkaline solution is noted; the amount excreted in each of the next 2 hours is then estimated colouri …

phenoluria
The excretion of phenols in the urine. ... (05 Mar 2000) ...

phenomenology
<study> A description, history, or explanation of phenomena. 'The phenomenology of the mind.' ... Origin: Phenomenon: cf. F. Phenomenologie. ... (01 Mar 1998) ...

phenomenon
Origin: L. Phaenomenon, Gr. Fainomenon, fr. Fainesqai to appear, fainein to show. See Phantom. ... 1. An appearance; anything visible; whatever, in matter or spirit, is apparent to, or is apprehended by, observation; as, the phenomena of heat, light, or electricity; phenomena of imagination or memory. 'In the phenomena of the material world, and in …

phenoperidine
<chemical> A narcotic analgesic partly metabolised to meperidine in the liver. It is similar to morphine in action and used for neuroleptanalgesia, usually with droperidol. ... Pharmacological action: analgesics, opioid, narcotics. ... Chemical name: 4-Piperidinecarboxylic acid, 1-(3-hydroxy-3-phenylpropyl)-4-phenyl-, ethyl ester ... (12 Dec 199 …

phenothiazine
<pharmacology> A group of tranquilising medications with antipsychotic action, thought to act by blocking dopaminergic transmission in the brain. They are used to treat mental, nervous and emotional disorders. ... Examples include: chlorpromazine, fluphenazine, mesoridazine, perphenazine, prochlorperazine, promazine, thioridazine, trifluoperaz …

phenothiazine sulfoxidase
<enzyme> Converts ethionamide, chlorpromazine and thioridazine to their corresponding sulfoxides; requires NADPH and oxygen; does not contain p-450 ... Registry number: EC 1.8.- ... Synonym: ethionamide sulfoxidase ... (26 Jun 1999) ...

phenotype
<biology, genetics> The total characteristics displayed by an organism under a particular set of environmental factors, regardless of the actual genotype of the organism. Results from interaction between the genotype and the environment. ... (09 Jan 1998) ...

phenotypic
Relating to phenotype. ... (05 Mar 2000) ...

phenotypic threshold
A quantitative genetic trait with a continuous distribution termed its liability may generate two kinds of phenotype, according to whether the liability lies above or below some critical threshold at about which a radical change in behaviour occurs. For instance, blood uric acid level is a liability with an approximately gaussian distribution. At a …

phenotypic value
In quantitative genetics, the metrical quantity of some trait associated with a particular phenotype. ... (05 Mar 2000) ...

phenoxazine
Phenothiazine in which S is replaced by O; as the 3-oxo derivative (phenoxazone), phenoxazine is the chromophore of actinomycins. ... (05 Mar 2000) ...

phenoxazone
See: phenoxazine. ... (05 Mar 2000) ...

phenoxybenzamine
<chemical> N-(2-chloroethyl)-n-(1-methyl-2-phenoxyethyl) benzenemethanamine. An alpha-adrenergic anatagonist with long duration of action. It has been used to treat hypertension and as a peripheral vasodilator. ... Pharmacological action: adrenergic alpha-antagonists, antihypertensive agents, sympatholytics, vasodilator agents. ... Chemical nam …

phenoxybenzamine hydrochloride
(2-Chloroethyl)-N-(1-methyl-2-phenoxyethyl benzylamine hydrochloride;a potent adrenergic (alpha-receptor) blocking agent of the beta-haloalkylamines; selectively blocks the excitatory response of smooth muscle and exocrine glands to epinephrine; used in the treatment of peripheral vascular diseases and in pheochromocytoma. ... (05 Mar 2000) ...

phenoxybenzoate dioxygenase
<enzyme> Catalyses conversion of 3- or 4-phenoxybenzoate to phenol and protocatechuate via a putative hemiacetal intermediate. ... Registry number: EC 1.14.14.- ... Synonym: 4-carboxydiphenyl ether dioxygenase, pob dioxygenase, pobb gene product ... (26 Jun 1999) ...

phenoxymethylpenicillin
Synonym for penicillin v ... <chemical> (2s-(2 alpha,5 alpha,6 beta)-3,3-dimethyl-7-oxo-6-((phenoxyacetyl)amino)-4-thia-1- azabicyclo(3.2.0)heptane-2-carboxylic acid. A broad-spectrum penicillin antibiotic used orally in the treatment of mild to moderate infections by susceptible gram-positive organisms. ... Pharmacological action: penicillins. …

phenozygous
Having a narrow cranium as compared with the width of the face, so that when the skull is viewed from above, the zygomatic arches are visible. ... Origin: G. Phaino, to show, + zygon, yoke ... (05 Mar 2000) ...

phenpentermine tartrate
A,a,beta-Trimethylphenethylamine;an anorexigenic agent. ... (05 Mar 2000) ...

phenprobamate
3-phenylpropyl carbamate;a skeletal muscle relaxant with antianxiety action. ... Synonym: proformiphen. ... (05 Mar 2000) ...

phenprocoumon
<chemical> 3-(1-phenylpropyl)-4-hydroxycoumarin. Long acting oral anticoagulant. It may cause diarrhoea. ... Pharmacological action: anticoagulant. ... Chemical name: 2H-1-Benzopyran-2-one, 4-hydroxy-3-(1-phenylpropyl)- ... (12 Dec 1998) ...

phenpropionate
USAN-approved contraction for 3-phenylpropionate. ... (05 Mar 2000) ...

phensuximide
N-Methyl-2-phenylsuccinimide;an anticonvulsant drug used in the treatment of petit mal epilepsy. ... (05 Mar 2000) ...

phentermine
<chemical> A central nervous system stimulant and sympathomimetic with actions and uses similar to those of dextroamphetamine. It has been used most frequently in the treatment of obesity. ... Pharmacological action: adrenergic agents, adrenergic uptake inhibitors, appetite depressants, central nervous system stimulants, dopamine agents, dopam …

phentolamine
<radiology> Alpha-adrenergic blocker, give before IV contrast in patient with pheochromocytoma ... (12 Dec 1998) ...

phentolamine hydrochloride
2-(N '-p-Tolyl-N '-m-hydroxyphenylaminomethyl)-imidazoline hydrochloride;an adrenergic (alpha-receptor) blocking agent. ... (05 Mar 2000) ...

phentolamine mesylate
Phentolamine methanesulfonate;the same actions as phentolamine hydrochloride, for intravenous use only. ... (05 Mar 2000) ...

phentolamine test
A test for pheochromocytoma; intravenous administration of phentolamine (5 mg) reduces hypertension due to a pheochromocytoma but not that due to other causes, e.g., essential hypertension; the blood pressure is raised by the drug in the latter form of hypertension. ... (05 Mar 2000) ...

phenyl
<chemistry> A hydrocarbon radical (C6H5) regarded as the essential residue of benzene, and the basis of an immense number of aromatic derivatives. ... <chemistry> Phenyl hydrate, a nitrogenous base (C6H5.N2H3) produced artificially as a colourless oil which unites with acids, ketones, etc, to form well-crystallized compounds. ... Origin: …

phenyl alcohol
Synonym for phenol ... <chemistry> ... 1. A white or pinkish crystalline substance, C6H5OH, produced by the destructive distillation of many organic bodies, as wood, coal, etc, and obtained from the heavy oil from coal tar. ... It has a peculiar odour, somewhat resembling creosote, which is a complex mixture of phenol derivatives. It is of the t …

phenyl aminosalicylate
P-aminosalicylic acid phenyl ester;an antituberculous drug. ... Phenyl salicylate, the salicylic ester of phenol; the phenylic ester of salicylic acid; an intestinal analgesic and antipyretic; it has been used in the treatment of rheumatism, diarrhoea, and pharyngitis, as an enteric coating for tablets, and in ointments for sunburn prevention. ... Sy …

phenylacetaldehyde dehydrogenase
<enzyme> From E coli; catalyses the oxidation of phenylacetaldehyde to phenylacetic acid in the presence of nad+ ... Registry number: EC 1.2.1.39 ... Synonym: phenylacetaldehyde-nad+ oxidoreductase ... (26 Jun 1999) ...

phenylacetate - CoA ligase
<enzyme> Catalyses the synthesis of phenylacetyl-CoA and phenoxyacetyl-CoA ... Registry number: EC 6.2.1.30 ... Synonym: phenylacetyl-CoA ligase, phenylacetic acid activating enzyme, phenoxyacetic acid activating enzyme, phenacyl coenzyme a ligase, phenylacetate-CoA ligase (AMP-forming) ... (26 Jun 1999) ...

phenylacetic acid
C6H5CH2COOH;an abnormal product of phenylalanine catabolism, appearing in the urine in individuals with phenylketonuria. ... (05 Mar 2000) ...

phenylaceturic acid
Synonym for phenaceturic acid ... C6H5CH2CO-NH-CH2COOH;an end product of the metabolism of phenylated fatty acids with even numbers of carbon atoms. ... Synonym: phenylaceturic acid. ... (05 Mar 2000) ...

phenylacetylurea
Synonym for phenacemide ... An anticonvulsant used in the treatment of epilepsy. ... Synonym: phenylacetylurea. ... (05 Mar 2000) ...

phenylacrylic acid
Synonym for cinnamic acid ... C6H5CH==CHCOOH; 3-phenylpropenoic acid;obtained from cinnamon oil, Peruvian and tolu balsams, or storax. It has been used in lupus as paint and in infectious diseases to promote leukocytosis. ... Synonym: cinnamylic acid, phenylacrylic acid. ... (05 Mar 2000) ...

phenylacrylic acid decarboxylase
<enzyme> Confers resistance to phenylacrylic acids in yeasts; enzyme from bacillus pumilus catalyses nonoxidative conversion of ferulic acid and p-coumaric acid to 4-vinylguaiacol and 4-vinylphenol, respectively; amino acid sequence in first source ... Registry number: EC 4.1.1.- ... Synonym: cinnamic acid decarboxylase, ferulate decarboxylase, …

phenylalaninase
Phenylalanine 4-monooxygenase. ... (05 Mar 2000) ...

phenylalanine
<amino acid> One of the amino acids which the body cannot manufacture itself, but must acquire from food. It is abundant in meats and cheese. ... Phenylalanine is a precursor of tyrosine and together they lead to the formation of thyroxine or thyroid hormone and of adrenaline and noradrenaline which is converted into a neurotransmitter, a brai …

phenylalanine 4-hydroxylase
Synonym for phenylalanine 4-monooxygenase ... <enzyme> An enzyme that catalyses the oxidation of l-phenylalanine to l-tyrosine with O2 and tetrahydrobiopterin (the latter forming the dihydro derivative) which is reduced by NADPH and a reductase to the active form; a deficiency of either of these enzymes will result in phenylketonuria. ... Synon …

phenylalanine 4-monooxygenase
<enzyme> An enzyme that catalyses the oxidation of l-phenylalanine to l-tyrosine with O2 and tetrahydrobiopterin (the latter forming the dihydro derivative) which is reduced by NADPH and a reductase to the active form; a deficiency of either of these enzymes will result in phenylketonuria. ... Synonym: phenylalanine 4-hydroxylase. ... (05 Mar 2 …

phenylalanine aminopeptidase
<enzyme> Metalloenzyme from legionella pneumophila; mw: 35,000; pH optimum 8-9.5 ... Registry number: EC 3.4.11.- ... (26 Jun 1999) ...

phenylalanine ammonia lyase
<enzyme> An enzyme that catalyses the deamination of l-phenylalanine to form trans-cinnamate and ammonia. It may also act on l-tyrosine. Since the enzyme deprives neoplastic tissue of phenylalanine, it has been used experimentally in the treatment of acute lymphoblastic leukaemia. The enzyme is obtained from many plants and is used as an enzy …

phenylalanine hydroxylase
<enzyme> An enzyme of the oxidoreductase class that catalyses the reaction l-phenylalanine, tetrahydrobiopterin, and oxygen to yield l-tyrosine, dihydrobiopterin, and water, the reaction synthesizing tyrosine from phenylalanine. ... Chemical name: L-Phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase (4-hydroxylating) ... Registry number: E …