The gene encoding the human basic fibroblast growth factor (hbFGF) has been already chemically-synthesized and cloned in pET-3a expression vector (Pasteur Institute of Iran). In the present study, we compared the level of expression of this synthetic hbFGF and its related cDNA in Escherichia coli. The pBR322-cDNA of hbFGF supplied by Dr. Seno (from Molecular Biology Dept, Okaido prefectural uni...

background: chitin is an abundant natural polysaccharide found in fungi, algae, and exoskeleton of insects. several bacterial species are capable of utilizing chitin as their carbon source. these bacteria produce chitinases for degradation of chitin into n-acetyl-d-glucosamine. so far, regulation of the chitinase encoding genes has been studied in different bacterial species. among bacillus spe...

introduction: human t cell lymphotropic l.irus type i is responsible for adult t cell leukemia/lymphoma and htlv-i associated myelopathy. the aim of this study was constructing two reporter plasmids to enable us to evaluate the effects of htlv-i tax protein upon intra cellular signalling pathways which recruit creb and nfkb proteins. material and methods: a complete coding region of bacterial b...

The activity of 11 beta-hydroxysteroid dehydrogenase (11 beta-HSD) in human granulosa cells has been shown to be associated with the outcome of treatment following in-vitro fertilization and embryo transfer. There are two known isoforms of 11 beta-HSD which differ significantly in their actions and co-factor requirements. The net activity of 11 beta-HSD which differ significantly in their actio...

Interferon is a protein secreted by eucaryotic cells following stimulation by viruses, bacteria, and many other immunogenes. Recent medical studies indicate that interferons have effective role in the treatment of virus infections, immunodeficiency and certain types of cancer such as hairy cell leukaemia (HCL). The aim of the present study is to apply yeast strain for secreting human IFNα2b fol...

several research groups have attempted to make recombinant bacteria capable of efficient desulfurization of oil fraction. the main aim of this study was to design a recombinant strain in order to desulfurize dibenzothiophen (dbt) and its components found in petroleum. in this study the pvlt31 vector harboring dszabc genes was transferred into recombinant e. coli bl21 which contained the dszd ge...

background: rh (rhesus) is a highly complex blood group system in man deeply rooted in transfusion medicine. isolation of rhd from cord blod, cloning and expression of recombinant rhd antigen in bacterial expression system was the aim of this study. methods: total rnas were extracted from cord blood (o + ).  the quality of rna was determined by electrophoresis. in or­der to obtain coding sequen...

BACKGROUND Hippophae rhamnoides, a high altitude habitat plant, has been extremely used in traditional medicinal practices for treating a variety of ailments. Recently, an extract (RH-3) prepared from berries of Hippophae rhamnoides has been reported to exhibit significant radioprotection against whole body lethal irradiation. OBJECTIVE Present study was undertaken to elucidate the DNA bindin...

The Rhodobacter sphaeroides hemA gene codes for 5-aminolevulinate (ALA) synthase. This enzyme catalyzes the pyridoxal phosphate-dependent condensation of succinyl coenzyme A and glycine-forming ALA. The R. sphaeroides hemA gene in the pUC18/19 vector system was transformed into Escherichia coli. The effects of both genetic and physiological factors on the expression of ALA synthase and the prod...

BACKGROUND The trinucleotide repeats AAT•ATT are simple DNA sequences that potentially form different types of non-B DNA secondary structures and cause genomic instabilities in vivo. METHODOLOGY AND PRINCIPAL FINDINGS The molecular mechanism underlying the maintenance of a 24-triplet AAT•ATT repeat was examined in E. coli by cloning the repeats into the EcoRI site in plasmid pUC18 and into th...