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... The envelope protein gp64 of the baculovirus Autographa californica nuclear polyhedrosis virus is essential for viral entry into insect cells, as the glycoprotein both mediates pHâdependent membrane fusion and binds to host cell receptors. Surface modification of baculovirus particles by genetic engineering of gp64 has been demonstrated by various strategies and thus has become an important and ...
cross reaction; Helianthus annuus; Eucalyptus; biomarkers; polyacrylamide gel electrophoresis; Western blotting; pollen; honey
Abstract:
... We report on the development of a novel alternative method for the assessment of floral origin in honey samples based on the study of honey proteins using immunoblot assays. The main goal of our work was to evaluate the use of honey proteins as chemical markers of the floral origin of honey. Considering that honeybee proteins should be common to all types of honey, we decided to verify the usefuln ...
... Epoxide hydrolase (EC 3.3.2.3) in plants is involved in the metabolism of epoxy fatty acids and in mediating defence responses. We report the cloning of a fullâlength epoxide hydrolase cDNA (BNSEH1) from oilseed rape (Brassica napus) obtained by screening of a cDNA library prepared from methyl jasmonate induced leaf tissue, and the 5â²âRACE technique. The cDNA encodes a soluble protein contai ...
... Copper (Cu) deficiency is associated with increased susceptibility of tissue homogenates or lipoproteins to oxidation in vitro. Plasma is easily sampled and contains both lipid and protein components that may be susceptible to oxidation, making it appropriate to investigate plasma oxidation variables as biomarkers of in vivo oxidative stress. Oxidation of plasma proteins may be discernible as an i ...
... Anionic peptides (APs) are small antimicrobial peptides present in human and ovine lung. In this study APs were also detected in bovine lung, and production of APs in lungs with acute inflammation induced by various stimuli was determined. The distribution and intensity of APs were determined by immunohistochemistry in lungs of 1) neonatal calves (1-3 days of age) inoculated with Mannheimia (Paste ...
... One of the limiting factors in understanding immune responses in marsupials is the scarcity of marsupial specific immunological reagents. This paper describes the characterisation of an antiserum raised against a recombinant protein of the constant region of the heavy chain of IgA (Cα) of the common brushtail possum (Trichosurus vulpecula). The availability of a marsupial specific anti-IgA provide ...
... Objective To isolate Neospora caninum from a congenitally infected calf. Procedure A calf was obtained from a N caninum infected dam maintained in a dairy herd of Holstein-Friesian cattle located on the south coast of NSW near Nowra. The calf was euthanased and samples collected for serology and pathology. Samples of brain and spinal cord of the calf were homogenised and injected into immunocompro ...
... Lectin from females of the important sand fly vector, Phlebotomus duboscqi (Diptera: Psychodidae), was isolated by immunoaffinity chromatography using a minicolumn with immobilized anti‐lectin immunoglobulins. Carbohydrate‐binding specificity of active fractions corresponded to that of midgut and salivary gland lysates. Haemagglutination was inhibited by d‐glucosamine, d‐galactosamine and d‐mannos ...
... Aims: To investigate the distribution of chitinase in Bacillus thuringiensis strains, and the enhancing effects of the chitinase-producing B. thuringiensis strains on insecticidal toxicity of active B. thuringiensis strain against Spodoptera exigua larvae. Methods and Results: The chitinolytic activities of B. thuringiensis strains representing the 70 serotypes were investigated by the whitish opa ...
... Type I interferons (IFN) are important mediators of the host defense against viral infections in mammals. In humans multiple subtypes of IFN-α exist, most of which possess antiviral activity. Little is known about the type I IFN genes in cats and the role they may play in feline immunological responses to viruses. We have isolated cDNAs encoding five feline IFN-α (feIFN) subtypes that share from 9 ...
... A putative new serotype of chicken infectious anemia virus (CIAV) isolated from 17-wk-old broiler breeder pullets was compared with a known, previously characterized CIAV isolate, the Del-Ros strain. Physicochemical characteristics evaluated included thermal stability, size, pH, and chloroform sensitivity. Physicochemically, CIAV-7 was identical to CIAV. The virus isolates were compared antigenica ...
... Although the role of arachidonic acid (AA) in the regulation of steroidogenesis is well documented, the mechanism for AA release is not clear. Therefore, the aim of this study was to characterize the role of an acylâCoA thioesterase (ARTISt) and an acylâCoA synthetase as members of an alternative pathway in the regulation of the intracellular levels of AA in steroidogenesis. Purified recombina ...
... The spike 1 (S1) surface glycoprotein of infectious bronchitis virus (IBV) is the major inducer of the generation of virus neutralizing antibodies, and the administration of purified S1 has been shown to elicit a protective immune response against virulent virus challenge. On the basis of these observations, recombinant fowl poxvirus (rFPV) containing a cDNA copy of the S1 gene of IBV Mass 41 (rFP ...
Western blotting; breast milk; cell adhesion; epitopes; ethanolamine; immunoassays; milk; monoclonal antibodies; oligosaccharides; spectroscopy; thin layer chromatography
Abstract:
... Background Human milk contains a large variety of oligosaccharides which show structural similarities with ligands for selectins, a family of cell adhesion molecules which are involved in many cell-cell interactions. Aim of the study Due to their structural similarity with selectin ligands, human milk oligosaccharides were labelled with phosphatidyl ethanolamine to be able to investigate specific ...
... The chicken IL-15 gene was recently cloned and shown to encode a polypeptide with T cell growth factor activity similar to IL-2. To further characterize the chemical and biological properties of chicken IL-15, we generated a panel of monoclonal antibodies against bacterially expressed protein and characterized their binding specificities. All antibodies were reactive by ELISA with recombinant IL-1 ...
interspecific variation; lemon juice; polyacrylamide gel electrophoresis; peptides; orange juice; adulterated products; Western blotting; grapefruit juice; detection
Abstract:
... Tissue- and species-specific peptides of the grapefruit have been investigated by SDS-PAGE and Western blot. Five peptides from the juice and one peptide from the peel were isolated by preparative gel electrophoresis. Polyclonal antibodies were developed against them in mice. It can be established that 82, 63, and 46 kDa peptides occurred exclusively in the samples prepared from the grapefruit and ...
Western blotting; actin; adipocytes; adipose tissue; bariatric surgery; binding proteins; body mass index; fatty acid metabolism; fatty acids; free fatty acids; gender; gene expression regulation; humans; insulin resistance; lipolysis; models; obesity; weight loss
Abstract:
... OBJECTIVE: Disturbances in adipocyte lipolysis in obesity may contribute to elevated circulating non-esterified fatty acid (NEFA) concentrations and insulin resistance. In experimental models, NEFA metabolism is influenced by adipocyte proteins such as adipocyte and keratinocyte lipid binding proteins (aP2/ALBP and mal1/KLBP) and fatty acid translocase (CD36). We investigated the effect of obesity ...
Castanea crenata; Western blotting; adhesion; chestnut shells; enzyme-linked immunosorbent assay; ethanol; fibroblasts; fibronectins; fluorescent antibody technique; mice; staining; East Asia
Abstract:
... The inner shell of the chestnut (Castanea crenata S. et Z., Fagaceae) has been used as an anti-wrinkle/skin firming agent in East Asia, and preliminary experiments have found that a 70% ethanol extract from this plant material can prevent cell detachment of skin fibroblasts from culture plates. In order to examine the molecular mechanisms underlying this phenomenon, its effects on the expression o ...
DNA; NAD ADP-ribosyltransferase; Western blotting; apoptosis; caspase-3; caspase-8; cell cycle checkpoints; cell proliferation; death; eicosapentaenoic acid; flow cytometry; leukemia; neoplasm cells; protein synthesis; thymidine; tritium; valine
Abstract:
... Eicosapentaenoic acid (EPA; 20∶5n−3) may reduce the cell number in cultured leukemia/lymphoma cells owing to reduced cell proliferation, induction of cell death, or a combination of these processes. EPA has been shown to promote apoptosis in Ramos cells, and our present study was focused on a possible cell cycle arrest and the pathways by which the apoptotic process is induced. Apoptosis may proce ...
... Novel methylotrophic Arthrobacter and Hyphomicrobium species are described. Constitutive membrane-associated dimethylsulfone- and dimethylsulfoxide-reductases were found in Arthrobacter methylotrophus strain TGA and Hyphomicrobium sulfonivorans strain S1. Enzyme activities increased during growth with dimethylsulfone or dimethylsulfoxide, respectively, and different ratios of activity with differe ...
... Amastigotes of Leishmania species belonging to the Leishmania mexicana complex exhibit large lysosomes, called megasomes, which are rich in cysteine proteinases. Various aspects of the host-parasite interaction, the differentiation process as well as intracellular survival, have been attributed to these proteinases. The in vitro differentiation from promastigote to amastigote forms of Leishmania a ...
chickens; Gallid alphaherpesvirus 1; protein synthesis; specific pathogen-free animals; antigens; antibodies; flocks; vaccines; Western blotting; enzyme-linked immunosorbent assay; nickel; bird diseases; antiserum; glycoproteins; Escherichia coli
Abstract:
... Three glycoproteins of infectious laryngotracheitis virus (ILTV), gC, gE, and gp60, were expressed in Escherichia coli as fusion proteins with a 6-histidine tag at their amino termini. The proteins expressed, designated as r-gC, r-gp60, and r-gE, all retain their antigenicity, as revealed by Western blot with chicken antiserum against ILTV. However, only r-gp60 and r-gE, but not r-gC, were found t ...
... Fire blight, caused by Erwinia amylovora, is a major disease of pear (Pyrus communis L.). Different strategies to enhance fire blight resistance of pear through genetic engineering are currently studied in our group. Among them, transformation of pear with a depolymerase gene from a bacteriophage has been investigated. This gene encodes an enzyme that degrades the capsular exopolysaccharide (EPS) ...
... Pycnoporus cinnabarinus laccase lac1 gene was overexpressed in Aspergillus niger, a wellâknown fungal host producing a large amount of homologous or heterologous enzymes for industrial applications. The corresponding cDNA was placed under the control of the glyceraldehydeâ3âphosphate dehydrogenase promoter as a strong and constitutive promoter. The laccase signal peptide or the glucoamylase ...
Lactuca sativa; Southern blotting; Western blotting; genes; herbicides; lettuce; metallothionein; mice; mutants; polymerase chain reaction; sexual reproduction; zinc
Abstract:
... Mouse metallothionein (MT) domain mutant ββ-cDNA gene has been inserted into the plant expression vector pGPTVd35S which has herbicide (PPT)resistance gene bar as a selective marker. The chimeric gene was introduced into the lettuce (Lactuca sativa L. cv Salinas 88) by Agrobacterium-mediated transformation. PCR and Southern blot analysis of some putative transformants indicated that the introduced ...
Feline immunodeficiency virus; Human immunodeficiency virus; USDA; Western blotting; acquired immunodeficiency syndrome; cats; cross reaction; diagnostic techniques; human diseases; humans; industry; medicine; models; vaccine development; vaccines; veterinary medicine
Abstract:
... Feline immunodeficiency virus (FIV) is a natural infection of domestic cats that results in acquired immunodeficiency syndrome resembling human immunodeficiency virus (HIV) infection in humans. The worldwide prevalence of FIV infection in domestic cats has been reported to range from 1 to 28%. Hence, an effective FIV vaccine will have an important impact on veterinary medicine in addition to being ...
... The chitinase A (chiA) gene from Enterobacter sp. G-1 and the chitosanase A (choA) gene from Matsuebacter chitosanotabidus 3001 were expressed separately and simultaneously in the yeast Schizosaccharomyces pombe. The chiA gene was placed under the transcriptional control of the nmt1 promoter with the glutathione S transferase (GST), and the choA gene was expressed by the human cytomegalovirus (hCM ...
... Oviparously developing embryos of the brine shrimp, Artemia franciscana, synthesize abundant quantities of a small heat shock/αâcrystallin protein, termed p26. Wildâtype p26 functions as a molecular chaperone in vitro and is thought to help encysted Artemia embryos survive severe physiological stress encountered during diapause and anoxia. Fullâlength and truncated p26 cDNA derivatives were ...
... : Gene knock-down technology using antisense molecules has many applications for studying gene function, disrupting undesirable genetic traits, as well as providing effective therapy for a number of viral diseases. Encouraged by these applications, we developed a gene knock-down technique to interfere with gene expression using transgenic rainbow trout expressing the green fluorescent protein (GFP ...
... The coat protein gene (CP) from a highly virulent, necrotic and dominant strain of potato virus Y (PVY) originated from the Hungarian flora has been engineered via Agrobacterium infection into different Hungarian tobacco breeding lines and cultivars. The integration of the CP was confirmed by polymerase chain reaction (PCR) using genomic preparations. The transcription and the expression of the ...
Erwinia rhapontici; Western blotting; bacteria; carbon; extracellular fluids; flowers; food production; fractionation; genes; isomaltulose; isomers; leaves; octopine; potatoes; protein secretion; protein synthesis; signal peptide; sucrose; tobacco; transgenic plants
Abstract:
... Palatinose (isomaltulose, 6-O-α-D-glucopyranosyl-D-fructose) is a structural isomer of sucrose which is produced from sucrose by some bacterial strains as a reserve material during periods of low carbon availability. The ability to synthesise palatinose is not only advantageous for the bacteria but is also of industrial interest since palatinose is used as a sucrose substitute in food production. ...
... Bordetella dermonecrotic toxin (DNT) stimulates the assembly of actin stress fibers and focal adhesions by deamidating or polyaminating Gln63 of the small GTPase Rho. DNT is an A-B toxin which is composed of an N-terminal receptor-binding (B) domain and a C-terminal enzymatically active (A) domain. In this study, to analyze the functional and structural organization of DNT, we prepared 10 clones o ...
Western blotting; alternative splicing; amino acids; cDNA libraries; complementary DNA; cytoplasm; dimerization; disulfide bonds; hepatocytes; humans; liver; mass spectrometry; molecular weight; mutants; transcription factors; two hybrid system techniques
Abstract:
... Hepatopoietin (HPO) is a novel human hepatotrophic growth factor. Recently, we demonstrated that the extracellular ligand form of HPO can stimulate proliferation of hepatic cells via its specific receptor, which is on the surface of these cells. Also, the intracellular form of HPO potentiates the transcriptional factor APâ1. Intriguingly, a variety of HPO complexes with different molecular masse ...
... Eleven monoclonal antibodies specific for ovine, bovine and human cytokines were investigated by flow cytometry for cross-reactivities with cytokines produced by peripheral blood mononuclear cells (PBMCs) from sheep, cattle, goat, swine, horse, dog, mink, rabbit and human. Four antibodies specific for IL-4, IL-8, IFN-γ and TNF-α cross-reacted with cytokines from a majority of the species investiga ...
... Three synthetic peptides (SBm4912, SBm7462 and SBm19733), derived from the Bm86 glycoprotein from Boophilus microplus gut, were constructed and used to immunize cattle from a tick-free area. The immunized animals received three subcutaneous doses of the peptides, with saponin as adjuvant, at 30-day intervals. The immune response was evaluated by IgG elicited against the peptides by the detection o ...
Western blotting; cytosol; glucose; glycolysis; heart; isozymes; metabolic studies; obesity; oxidation; protein kinase C; rats
Abstract:
... OBJECTIVE: To investigate the influence of obesity on the regulation of myocardial glucose metabolism following protein kinase C (PKC) activation in obese (fa/fa) and lean (Fa/?) Zucker rats. DESIGN: Isolated hearts obtained from 17-week-old lean and obese Zucker rats were perfused with 200 nM phorbol 12-myristate 13-acetate (PMA) for different time periods prior to the evaluation of PKC and GLUT- ...
Dicentrarchus labrax; Western blotting; bass; denaturation; desmin; digestion; molecular weight; myofibrillar proteins; myosin heavy chains; polyacrylamide gel electrophoresis; polypeptides; proteolysis; skeletal muscle
Abstract:
... The effects of m-calpain isolated from the skeletal muscle of sea bass on sarcoplasmic and myofibrillar proteins isolated from the same tissue were examined in vitro. Incubation of sarcoplasmic proteins with m-calpain resulted in only a slight decrease (0.7 kDa) in the molecular weight (MW) of a 26.5 kDa protein. Degradation of myofibrils, monitored by quantification of TCA-soluble peptides genera ...
... The VP37 protein encoded by the RNA2 of Broad bean wilt virus 2 (BBWV2) was overexpressed in Escherichia coli. The protein was purified and a polyclonal antibody specific for the protein was produced. Time course studies by Western blot assays in BBWV2-infected Chenopodium quinoa leaves showed that the VP37 protein was present in cells of the inoculated leaves by 12 h post inoculation and in cells ...
... Haemophilus somnus isolates from cases of thrombotic meningoencephalitis, pneumonia, and other disease sites are capable of undergoing a high rate of phase variation in the oligosaccharide component of their lipooligosaccharides (LOS). In contrast, the LOS of commensal strains isolated from the normal reproductive tract phase vary little or not at all. In addition, the LOS of H. somnus shares cons ...
... Mannheimia (Pasteurella) haemolytica A1 produces several virulence factors that play an important role in the pathogenesis of bovine pneumonic pasteurellosis. Foremost among these is a leukotoxin (LKT) that specifically kills ruminant leukocytes. Recent evidence suggests that M. haemolytica LKT binding to bovine leukocytes is mediated by the beta2-integrin CD11a/CD18 (lymphocyte function-associate ...
tomatoes; pericarp; yeasts; flow cytometry; cell division; Western blotting; Cucumis melo subsp. melo var. cantalupo; avocados; genes; mutants; fruiting
Abstract:
... The fruit size of melon (Cucumis melo var. reticulatus) is determined by the number of pericarp cells that are defined during early fruit development. It has been reported that the expression and activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGR) is required for early fruit growth in tomato and avocado. In this study, we cloned a melon HMGR gene and investigated its involvement in ...
... A cDNA encoding 6âphosphofructoâ2âkinase/fructoseâ2,6âbisphosphatase was isolated from a Spinacia oleracea leaf library and used to express a recombinant enzyme in Escherichia coli and Spodoptera frugiperda cells. The insoluble protein expressed in E.âcoli was purified and used to raise antibodies. Western blot analysis of a protein extract from spinach leaf showed a single band of 90. ...
... Fibrinogen-binding proteins were found in the culture supernatants of Mannheimia haemolytica serotype 1 (ATCC 43270) and Pasteurella trehalosi serotype 10 (ECO-100). Sheep fibrinogen was biotinylated and shown to bind to proteins in the culture supernatants by modified western blot. Fibrinogen-binding proteins in the culture supernatant may be important virulence factors leading to the characteris ...
Saccharomyces cerevisiae; Western blotting; beta-galactosidase; carbon; galactose; gene expression; genes; glucose; glycerol; green fluorescent protein; nuclear localization signals; oxygen; phenotype
Abstract:
... We have reported previously that multiple copies of MRG19 suppress GAL genes in a wildâtype but not in a gal80 strain of Saccharomyces cerevisiae. In this report we show that disruption of MRG19 leads to a decrease in GAL induction when S.âcerevisiae is induced with 0.02% but not with 2.0% galactose. Disruption of MRG19 in a gal3 background (this strain shows longâterm adaptation phenotype) ...
Arabidopsis thaliana; transgenic plants; seedlings; seedling growth; ethylene; hormone receptors; signal peptide; enzyme activity; gene expression; biochemical pathways; Saccharomyces cerevisiae; plant morphology; nucleotide sequences; signal transduction; binding sites; Western blotting
Abstract:
... The ethylene receptor family of Arabidopsis consists of five members, one of these being ETR1. The N-terminal half of ETR1 contains a hydrophobic domain responsible for ethylene binding and membrane localization. The C-terminal half of the polypeptide contains domains with homology to histidine (His) kinases and response regulators, signaling motifs originally identified in bacteria. The role of t ...