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Pagina 1 a partire dal 155 risultati
Use of alkaline sucrose gradients in a zonal rotor to detect integrated and unintegrated avian sarcoma virus-specific DNA in cells.
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We have attempted to distinguish integrated and unintegrated forms of avian sarcoma virus-specific DNA in cells by sedimentaton through an alkaline sucrose gradient in a slowly reorienting zonal rotor. Results obtained with this procedure are similar to those obtained by the more convenient analysis
The density of the Rous sarcoma virus in sucrose solutions.
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The ORF45 protein of Kaposi's sarcoma-associated herpesvirus is associated with purified virions.
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Kaposi's sarcoma-associated herpesvirus (KSHV) ORF45 is encoded by an immediate-early gene in the KSHV genome. This protein was recently shown to interact with interferon regulatory factor 7 and inhibit virus-mediated alpha/beta interferon induction (Zhu et al., Proc. Natl. Acad. Sci. USA
Proteomic analysis of the Kaposi's sarcoma-associated herpesvirus terminal repeat element binding proteins.
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Terminal repeat (TR) elements of Kaposi's sarcoma-associated herpesvirus (KSHV), the potential origin sites of KSHV replication, have been demonstrated to play important roles in viral replication and transcription and are most likely also critical for the segregation of the KSHV genome to daughter
Properties of a ribonucleoprotein particle isolated from Nonidet P-40-treated Rous sarcoma virus.
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A ribonucleoprotein particle containing about 20% ribonucleic acid (RNA), and containing little if any phospholipid or glucosamine, was recovered in high yield after treatment of Schmidt-Ruppin strain of Rous sarcoma virus and B77 virus with the nonionic detergent Nonidet P-40. This structure, which
Regulation of folate reductase synthesis in sensitive and methotrexate-resistant sarcoma 180 cells. In vitro translation and characterization of folate reductase mRNA.
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A highly specific assay for folate reductase mRNA activity from Sarcoma 180 cells was developed using the rabbit reticulocyte lysate protein synthesizing system. Quantitation of in vitro folate reductase synthesis was accomplished by direct immunoprecipitation from lysate reactions. The in vitro
1,25-Dihydroxyvitamin D3 receptor-like macromolecule in rat osteogenic sarcoma cell lines.
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The hormonal metabolite of vitamin D3, 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), exerts its biological effects by initially binding to a cytosolic receptor protein. Such a protein has been demonstrated in the target organs of vitamin D3 including bone. Although the role of 1,25(OH)2D3 on the skeleton
Characterization of a small (25-kilodalton) derivative of the Rous sarcoma virus Gag protein competent for particle release.
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Retroviral Gag proteins have the ability to induce budding and particle release from the plasma membrane when expressed in the absence of all of the other virus-encoded components; however, the locations of the functional domains within the Gag protein that are important for this process are poorly
Production of Rous sarcoma virus-like particles displaying human transmembrane protein in silkworm larvae and its application to ligand-receptor binding assay.
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Two types of Rous sarcoma virus (RSV) group-antigen protein (Gag) virus like particles (VLPs), full-length Gag (Gag701) and RSV protease domain (PR)-deleted mutant (Gag577) were expressed in silkworm larvae. Gag577 was secreted into hemolymph efficiently using wild type bacmid (WT), cysteine
Properties of a soluble DNA polymerase isolated from Rous sarcoma virus.
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The DNA polymerase of the Prague strain of Rous sarcoma virus of subgroup C and of the Schmidt-Ruppin strain of subgroup A has been solubilized. DNA polymerase purified by sucrose gradient sedimentation and chromatography on DEAE-cellulose represented less than 2% of the soluble [(14)C]protein of
Effects of alkylating agents on the DNA replication of cultured Yoshida sarcoma cells.
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Logarithmically growing Yoshida sarcoma cells were treated for 1 h with low (2 decades cell kill) or high (more than 6 decades cell kill) doses of alkylating agents. Pulse and chase labelled DNA from treated cells were studied by alkaline sucrose gradient centrifugation. Nitrogen mustard (HN-2),
Reverse transcriptase-containing particles induced in rous sarcoma virus-transformed rat cells by arginine deprivation.
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Incubation of rat cells transformed by Rous sarcoma virus (RSV) in an arginine-deficient medium resulted in accumulation of particles in the culture medium. Such particles did not appear when the transformed rat cells were incubated in a complete medium nor in the medium of primary rat cells which
Mutational analysis of the oligomer assembly domain in the transmembrane subunit of the Rous sarcoma virus glycoprotein.
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The transmembrane (TM) subunits of retroviral envelope glycoproteins appear to direct the assembly of the glycoprotein precursor into a discrete oligomeric structure. We have examined mutant Rous sarcoma virus envelope proteins with truncations or deletions within the ectodomain of TM for their
Comparison of Rous sarcoma virus-specific deoxyribonucleic acid polymerases in virions of Rous sarcoma virus and in Rous sarcoma virus-infected chicken cells.
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Labeled virions of Rous sarcoma virus (RSV) were disrupted with detergent and analyzed on equilibrium sucrose density gradients. A core fraction at a density of approximately 1.24 g/cc contained all of the (3)H-uridine label and about 30% of the (3)H-leucine label from the virions. Endogenous viral
The interaction of dianhydrogalactitol with DNA in cultured Yoshida sarcoma cells.
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Using alkaline sucrose gradient sedimentation centrifugation it was found that treatment of Yoshida sarcoma cells in culture for 1 h with increasing concentrations of dianhydrogalactitol (DAG) enhanced the sedimentation rate of DNA in a dose-dependent manner. There was no difference between the
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