cofactor

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cofactor

 [ko´fak-ter]
an element or principle, e.g., a coenzyme, with which another must unite in order to function.
heparin cofactor II a member of the serpin group that inhibits thrombin.

co·fac·tor

(kō'fak'ter, tōr),
1. Synonym(s): coenzyme
2. An atom or molecule essential for the action of a large molecule, for example, heme in hemoglobin, magnesium in chlorophyll. Solo metal ions are regarded as cofactors for proteins, but not as coenzymes.

cofactor

(kō′făk′tər)
n.
1. One of two or more contributing factors.
2. A substance, such as a metallic ion or coenzyme, that must be associated with an enzyme for the enzyme to function.

co·fac·tor

(kō'fak'tŏr)
1. Synonym(s): coenzyme.
2. An atom or molecule essential for the action of a large molecule; e.g., heme in hemoglobin, magnesium in chlorophyll.

cofactor

a substance that is essential for the catalytic activity of some enzymes, binding to the enzyme only during the reaction. Cofactors can be metallic ions, or nonprotein organic molecules (coenzymes) such as vitamins in the B-COMPLEX.

co·fac·tor

(kō'fak'tŏr)
An atom or molecule essential for the action of a large molecule.
References in periodicals archive ?
Where [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII.] and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII.] are [n.sub.i] x 1 vectors of known coefficients of the [k.sub.1th] and [k.sub.2th] common founder and second founder cofactors; [m.sub.1i], and [m.sub.2i] are number of marker cofactors considered from common founder and second founder haplotypes from population i.
The point of the analysis is that the cofactors of the Jacobian matrix can have their own, sometimes decisive, nonparametric properties.
Carnitine supplementation is the best understood type of cofactor therapy.
Tetrahydrobiopterin is an essential cofactor in the biosynthesis of catecholamines, serotonin and melatonin.
These reactions include (i) oxidation-reduction, (ii) carboxylation-decarboxylation, (iii) hydrolysis-dehydration, (iv) phosphorylation-dephosphorylation, (v) amination, and (vi) acylation; all these reactions are enabled by specific cofactors in enzyme-catalyzed transformations.
Patient 3: You supplement 150 mg 5-HTP, 1,500 mg tyrosine, 120 mg L-dopa, and cofactors twice daily.
where the summation occurs over c marker cofactors. For each cofactor c, a set [k.sub.c] of interconnected haplotypes have been identified.
What about other cofactors such as fetal station and position at the time of forceps application?
This conversion is universally important in DNA synthesis, however different organisms utilize enzymatic cofactors with varying compositions.
Cofactors. Although infection by HIV itself is almost certainly all that is required to produce an eventual depletion of CD4 T cells, other pathogens may play a role in accelerating the course of clinical disease.
Another interesting field, which is my own, is cofactors, not only to the disease but also to transmission.
For example, the mixing of aqueous high molecular weight PEO with some cofactors results in precipitate formation - clearly some form of interaction is taking place.