effects of yeast extract (ye) (0, 0.05, 0.1, 0.2, 0.5 and 1%) were investigated on rosmarinic acid (ra) accumulation and tyrosine aminotransferase (tat) gene expression in melissa officinalis seedlings at different time intervals (4 and 17 hours). based on the results, only ye concentrations of 0.05%, 0.1%, and 0.2%, for the 17-hour treatment, significantly stimulated ra biosynthesis pathway. a...

a 3*2*2 factorial experiment was conducted to study the effect of feeding whole wheat (0, 10, and 20%), a microbial enzyme source (arabino-xylanase based enzyme for wheat at 0% and 0.1%) and 0% or 1% insoluble grit (number 3 layer size) on the performance of white leghorn hens at 19 to 54 weeks of age. each dietary treatment was replicated four times with ten hens, housed two to a cage, eac...

objectives: liver is one of the most sensitive tissues to oxidant damage. hence, the present study was conducted to compare the effects of melissa officinalis (mo) extract and atorvastatin on the activity of liver enzymes in rats. materials and methods: in this experimental study, 60 male wistar rats were selected and allocated to six groups (n=10). the control group received a normal diet, sha...

Post-genomic data analysis represents a new challenge to link and interpret the vast amount of raw data obtained with transcriptomic or proteomic techniques in the context of metabolic pathways. We propose a new strategy with the help of a metabolic network graph to extend PathExpress, a web-based tool to interpret gene expression data, without being restricted to predefined pathways. We define...

The laccase enzyme is the largest group of Oxidoreductase enzymes and is capable of oxidizing a wide range of organic substrates to water along with molecular oxygen resuscitation. ZnO nanoparticles are known for their specific properties such as chemical stability, high electrochemical coupling rates, and wide range of absorption of radiation as multifunctional compounds. In this study, ZnO po...

Glycosylation is among the most common and complex post-translational modifications identified to date. It proceeds through the catalytic action of multiple enzyme families that include the glycosyltransferases that add monosaccharides to growing glycans, and glycosidases which remove sugar residues to trim glycans. The expression level and specificity of these enzymes, in part, regulate the gl...

angiotensin i-converting enzyme (ace) gene polymorphism; genotype dd or d allele may be involved with an increased susceptibility to type 2 diabetes and diabetic nephropathy (dn). we examined the frequency of ace gene polymorphism in 170 patients (85 type 2 diabetes with nephropathy and 85 without it) in tehran, iran. dna was extracted from the white blood cells and the i/d polymorphism of the ...

results the pcr approved the bacillus genus of the isolates. the strain of bacillus subtilis was identified using biochemical tests. 40 ºc and ph 11 are the optimum condition for maximum keratinase enzyme activity. objectives the aim of this study was the isolation of feather degrading bacillus spp.from a poultry waste and the optimization of conditions for the highest enzyme activity and feath...

background: angiotensin i converting enzyme (ace) is a zinc metalloproteinase, converts ang-i to ang- ii, a pro-inflammatory agent which may contribute to pathophysiology of some diseases like type 2 diabetes. objective: to investigate the relationship between ace i/d polymorphism and type 2 diabetes in 261 iranian casecontrol pairs. methods: 170 patients (85 type 2 diabetics with nephropathy a...