pteridine


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Related to pteridine: purine, folic acid

pter·i·dine

(ter'i-dēn),
Azinepurine; benzotetrazine; pyrazino[2,3-d]pyrimidine; a two-ring heterocyclic compound found as a component of pteroic acid and the pteroylglutamic acids (folic acids, pteropterin, etc.); simple pteridine derivatives (for example, xanthopterin, leucopterin) occur as pigments in butterfly wings, whence the name.

pteridine

(tĕr′ĭ-dēn′)
n.
1. A yellow crystalline compound, C6H4N2, having two fused six-member aromatic rings each containing two nitrogen atoms and four carbon atoms. One of the rings is a pyrimidine; the other is a pyrazine.
2. Any of a group of organic compounds derived from this compound, including folic acid and the pigments of butterfly wings.
References in periodicals archive ?
The levels of some pteridines increased significantly if there is a tumour inside the body.
1): (1) enzymatic scission between the pterin and the pABA-glutamyl moieties (as also occurs during oxidative cleavage); (2) deamination of the pteridine ring; (3) hydrolysis of the pABA-glutamyl linkage of folates or pABA-glutamate; and (4) removal of the polyglutamyl tail, leaving just the first glutamate.
Sulfonamides inhibit one of the integral enzymes in folate synthesis, dihydropteroate synthase (DHPS), which catalyzes the condensation of para-aminobenzoic acid and pteridine to form dihydropteroic acid (Figure).
Although most reports do not refer to the problem of resistance to pteridine, all these recognize the responsibility of plasmids with weights similar to those reported here for resistance to sulpha and trimethoprim (14-17).
This multimeric enzyme, which functions in the synthesis of pteridine eye pigments as well as BH4 cofactor, exists as multiple isoforms that are expressed in a developmentally and functionally specific manner (O'Donnell et al.
Wing color in Pontia and related pierine species is determined by two types of pigments: white and yellow pteridine pigments, and black melanin pigments.
Age determination in the adult screwworm (Diptera: Calliphoridae) by pteridine levels.
both the melanins and the pteridine compounds that generate the reds and yellows are by-products of metabolic activity that took place when the cells were still alive in the late pupa stage.
It is a book for the libraries of research institutes and universities, primarily of interest to chemists, medicinal chemists, and biochemists engaged in pteridine research.
Neopterin, a pteridine derivative produced by activated macrophages in response to stimulation by interferon-[gamma], is a marker of both immune activation and coronary artery disease (CAD) activity (2).
The quantitative relations between variation in red eye pigment and related pteridine compounds in Drosophila melanogaster.
1-4) Folate also differs from folic acid "in the extent of the reduction state of the pteroyl group, the nature of the substituents on the pteridine ring and the number of glutamyl residues attached to the pteroyl group.