pteridine

(redirected from Pteridines)
Also found in: Dictionary.

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 ?
He said that the oncopterin level in urine indicates whether cancer is likely to develop, and varying levels of the six pteridines can actually provide a "fingerprint" of the type of cancer.
During the study, the researchers identified six pteridine derivatives, compounds that help regulate the metabolism of cells, in the urine samples.
Identification of the genes encoding enzymes involved in the early biosynthetic pathway of pteridines in Synechocystis sp.
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.
Relying on Barthelmess and Robertson's (1970) interpretation of the correlated responses of pteridines in the eyes of D.
The subject matter is organized in terms of syntheses and reactions of pteridines.
Cosstick), pteridines, alloxazines, and flavins (C.
Neopterin belongs to the class of pteridines that are pyrazino-[2,3-d]-pyrimidine compounds occurring ubiquitously in living cells.
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).
Pteridine derivatives (6,7-dimethyltetrahydropterin and sepiapterin) were from Schircks Laboratories.
The phenylalanine concentrations, urinary pteridine values, and PTPS enzyme activities in red blood cells (16) are summarized in Table 1.