background: it is believed that environmental and genetic factors may be responsible for autism. methylenetetrahydrofolate reductase (mthfr) and its gene polymorphisms have been shown to be implicated as risk factors in autism. objectives: to analyze mthfr c677t polymorphism (rs1801133) in autistic patients. materials and methods: this study was carried out in 2014 and 2015 in northern iran. on...

background: alkyl hydroperoxide reductase (ahpc) of helicobacter pylori is considered as a diagnostic antigen. there­fore, this antigen can be used to detect h. pylori infection by stool immunoassays such as elisa. the aim of this study was to simplify the ahpc protein purification procedures. methods: for whole cell protein extraction, the bacterial cells were ruptured by octly-β-d glucopyrano...

It has been previously demonstrated that the enzymic activity of rat liver 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMG-CoA reductase; EC 1.1.1.34) is modulated in vitro and in vivo by a bicyclic cascade system involving reversible phosphorylation of HMG-CoA reductase and reductase kinase. In the present study, administration of mevalonolactone to rats caused a rapid inhibition of HMG-C...

Extensively purified rat liver cytosolic 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase kinase was used to examine the role of ADP in inactivation of HMG-CoA reductase (EC 1.1.1.34). Solubilized HMG-CoA reductase was a suitable substrate for HMG-CoA reductase kinase. At sufficiently high concentrations of solubilized HMG-CoA reductase, reductase kinase activity approached that measur...

Cucurbita pepo L. plants were grown in plastic pots with 2 kg washed sand per pot at three levels of potassium and sodium nitrate supplies to investigate the effects of nitrate supply on nitrate reductase activity and nitrate reductase expression in the leaves of the plants. Results demonstrated that starvation leads to decrease nitrate reductase activity and nitrate reductase expression. Suppl...

Key words alkylation - nitronates nitroalkanes α-tertiary amines ‘ene’-reductase (ERED) photoredox catalysis

Assay of HMG-CoA reductase kinase activity requires HMG-CoA reductase (reductase, E.C. 1.1.1.34) free of associated reductase kinase. Microsomal reductase insensitive to inactivation by Mg-nucleotides alone may be prepared by heating microsomes at 50 degrees C for 15 min. The reductase in these microsomes may subsequently be inactivated by Mg-nucleotides only after addition of reductase kinase....

background: nephrotic syndrome is a disorder that leads to hyperlipidemia. l-carnitine and genistein can effect on lipid metabolism and the syndrome. in the present study, we have delved into the separate and the twin-effects of l-carnitine and genistein on the gene expressions of hmg-coa reductase and ldl receptor in experimental nephrotic syndrome. methods: in this controlled experimental stu...

background: protozoa related to trypanosome family including leishmania , synthesize enzymes to escape from drug therapy. one of them is ptr1 that its enzymatic activity is similar to dihydrofolate reductase (dhfr). dihydrofolate reductase - thymidylate synthase has a major role in dna synthesis, if it is inhibited, the result would be the death of parasite. since ptr1 activity is similar to dh...