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Dictionary » C » Catecholamine



(Science: biochemistry, investigation, physiology) a type of biogenic amine derived from tyramine, characterised as alkylamino derivatives of ortho-dihydroxyphenylalkylamines in turn derived from tyrosine.

catecholamines include adrenaline, noradrenaline and dopamine, with roles as hormones and neurotransmitters.

measurement of noradrenaline and adrenaline can be made in blood and urine. Elevations may be seen in pheochromocytoma or neuroblastoma.

normal blood levels of adrenaline should be: 20 ng/ml and normal blood levels of noradrenaline should be 60 ng/ml.

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The Fiber Disease

... in patients with immunodeficiency syndromes. C. neoformans ex- presses laccase which produces melanin precursors from tyrosine, DOPA, and catecholamines, abundant in the host organism . However, the nature of the pigment produced in vivo under such conditions (eumelanin or other products ...

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by Nadas Moksha
Thu Oct 26, 2006 3:39 pm
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 4990306

manufacture of neurotransmitters

dopamine (a catecholamine) and serotonin are produced from a singe aminoacid: tyrosine/tryptophan. The first step is the synthesis of DOPA, dihydroxyphenylalanine by tyosine hydroxylase. Then DOPA is decarboxylized by DOPA decarboxylase ...

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by sdekivit
Wed Aug 03, 2005 6:26 pm
Forum: Cell Biology
Topic: manufacture of neurotransmitters
Replies: 1
Views: 2519

Sugar Level in the Body

Norepinephrine, known as noradrenaline outside the USA, is a catecholamine and a phenethylamine with chemical formula C8H11NO3. It is released from the adrenal glands as a hormone into the blood, but it is also a neurotransmitter in the nervous system ...

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by chemistry_freako
Tue Jul 26, 2005 5:20 am
Forum: Human Biology
Topic: Sugar Level in the Body
Replies: 19
Views: 9338

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