نتایج جستجو برای: enzymatic activities
تعداد نتایج: 424943 فیلتر نتایج به سال:
chilling is an important environmental stress that influences the yield and quality of many agricultural crops. different plants use different systems to endure this stress and minimize its effects. one of these systems is enzymatic reaction. to find out more about responses of different grapevine species and cultivars to the low temperature conditions, their enzymatic changes were evaluated in...
Nineteen Cryptococcus neoformans strains isolated from AIDS patients and 16 from bird droppings were tested for their extracellular activity. Typical enzymatic activity that was different from other medically important yeasts was found. The results obtained may indicate that there are new extracellular enzymatic activities that imply a relationship between C. neoformans and its virulence. A cor...
Heritable domains of generalized repression are a common feature of eukaryotic chromosomes and involve the assembly of DNA into a silenced chromatin structure. Sir2, a conserved protein required for silencing in yeast, has recently been shown to couple histone deacetylation to cleavage of a high-energy bond in nicotinamide adenine dinucleotide (NAD) and the synthesis of a novel product, O-acety...
The S1 subunit (Mr 28,000) of pertussis toxin expresses thiol-dependent enzymatic ADP-ribosyltransferase and NAD-glycohydrolase activities. Site-directed mutagenesis experiments were performed on the codon for Cys-41 of this subunit to investigate the role of this residue in both enzymatic activities. Deletion of Cys-41 caused a decrease in both activities below detectable levels, whereas repla...
the present study aimed at investigating the relationship between iranian efl teachers’ classroom management orientations and their teaching styles. additionally, the difference between male and female teachers’ teaching styles and classroom management orientations and their relationship with experience and age were explored. three hundred efl teachers filled in attitudes and beliefs on classro...
In this study the bacterial growth inhibitory activity of peptide fragments produced from goat’s milk whey proteins by enzymatic hydrolysis using trypsin, ficin and a combination of both was investigated. Goat’s milk whey proteins were isolated and subjected to enzymatic hydrolysis and peptides were purified by ultrafiltration followed by reverse-phase high-performance liquid chromatography (RP...
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