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Articles 61 - 82 of 82
Full-Text Articles in Life Sciences
Regulatory Analysis Of Vimentin Expression In Metastatic Versus Nonmetastatic Breast Cancer Cell Lines, Danielle N. Bird
Regulatory Analysis Of Vimentin Expression In Metastatic Versus Nonmetastatic Breast Cancer Cell Lines, Danielle N. Bird
Theses and Dissertations
The intermediate filament gene family, composed of six classes, shows both tissue and development-specific expression. Vimentin is a unique member of the intermediate filament protein family: although it is expressed in cells of mesenchymal origin, vimentin may also be expressed with other intermediate filament proteins during early stages of development. In some cases, as differentiation continues, vimentin is normally down-regulated whereas other intermediate filament proteins, like desmin, glial fibrillary acidic protein, or neurofilaments are turned on in muscle, glial cells, or neurons, respectively. In some metastatic cancers, including breast and prostate cancers, vimentin is aberrantly expressed, despite the embryonic origin …
Expression, Purification And Characterization Of Hepatitis C Virus Core Protein From E.Coli Using A Chemically Synthesized Gene (1), And Cloning, Expression, Purification And Characterization Of The Major Core Protein (P26) From Equine Infectious Anaemia Virus, Ashley James Birkett
Theses and Dissertations
The hepatitis c virus (HCV) core gene has been chemically synthesized and used to direct the expression of core protein in Escherichia coli (E.coli). When cloned downstream of the inducible T7 promotor the core gene directed the expression of a soluble protein with a molecular weight of 22 kDa. Under native conditions the protein behaved in a manner consistent with the formation of a multimeric structure, which may represent assembled core particles. Further, when examined by electron microscopy a heterogeneous mixture of nucleocapsid-like particles were visible. Core protein was specifically recognized by antibodies present in HCV infected serum, suggesting that …
Cloning, Expression, Purification And Characterization Of Domain B Of Wheat Germ Agglutinin, Ann C. Rice
Cloning, Expression, Purification And Characterization Of Domain B Of Wheat Germ Agglutinin, Ann C. Rice
Theses and Dissertations
Wheat germ agglutinin (WGA) belongs to a family of dimeric chitin binding lectins specific for N-acetyl-D-glucosamine (GlcNAc) and N-acetyl-D-neuraminic acid (NeuNAc). The polypeptide chain consists of a tandem repeat of four conserved 4.3 kDa domains (A, B, C, D) stabilized by four disulfide bonds. Saccharide binding occurs in the dimer interface where domains of different subunits are in contact (A with D, B with C). An aromatic amino acid rich pocket on one domain (sufficient for saccharide binding) and a polar region on the contacting domain constitute a complete binding site. Saccharide binding affinities may differ among the four unique …
Evidence Of Steric Factors In The Fungitoxic Mechanism Of 8-Quinolinol And Its 2-, 3-, 4-, 5-, 6- And 7-Chloro And Bromo Analogues / Herman Gershon, Donald D. Clarke, And Muriel Gershon Department Of Chemistry, Fordham University, Bronx, Ny 10458, Usa New York Botanical Garden, Bronx, Ny 10458, Usa, Herman Gershon, Donald Dudley Clarke Phd, Muriel Gershon
Evidence Of Steric Factors In The Fungitoxic Mechanism Of 8-Quinolinol And Its 2-, 3-, 4-, 5-, 6- And 7-Chloro And Bromo Analogues / Herman Gershon, Donald D. Clarke, And Muriel Gershon Department Of Chemistry, Fordham University, Bronx, Ny 10458, Usa New York Botanical Garden, Bronx, Ny 10458, Usa, Herman Gershon, Donald Dudley Clarke Phd, Muriel Gershon
Chemistry Faculty Publications
A study was made of the fungitoxicity of 2-, 3-, 4-, 5-, 6- and 7-chloro and bromo- 8-quinolinols against Aspergillus niger, A. oryzae, Myrothecium verrucaria, Trichoderma viride and Trichophyton mentagrophytes in Sabouraud dextrose broth and in Yeast Nitrogen Base supplemented with 1% D-glucose and 0.088% L-asparagine. Based on the presence or absence of synergism between pairs of substituted 8-quinolinols and reversal or nonreversal of toxicity by L-cysteine or Nacetyl- L-cysteine, the following conclusions were reached: (1) substituents on the quinoline ring change the site(s) of action of the toxicant; (2) the sites of action of the 5-, 6-, and 7-chloro-8-quinolinols …
Preparation And Fungitoxicity Of 3,6-Dichloro- And 3,6-Dibromo-8-Quinolinols / H. Gershon, D. D. Clarke, And M. Gershon Department Of Chemistry, Fordham University, Bronx, Ny 10458, Usa New York Botanical Garden, Bronx, Ny 10458, Usa, Herman Gershon, Donald Dudley Clarke Phd, Muriel Gershon
Preparation And Fungitoxicity Of 3,6-Dichloro- And 3,6-Dibromo-8-Quinolinols / H. Gershon, D. D. Clarke, And M. Gershon Department Of Chemistry, Fordham University, Bronx, Ny 10458, Usa New York Botanical Garden, Bronx, Ny 10458, Usa, Herman Gershon, Donald Dudley Clarke Phd, Muriel Gershon
Chemistry Faculty Publications
3,6-Dichloro- and 3,6-dibromo-8-quinolinols were prepared by direct halogenation of 8-nitroquinoline by N-halosuccinimide in acetic acid or by halogenation of the corresponding 6-halo-8-nitroquinoline prepared via a Skraup reaction. The nitro group was reduced to amino and the amine was hydrolyzed to the phenol in 70% sulfuric acid at 220 °C. The fungitoxicity of 3,6-dichloro- and 3,6-dibromo-8-quinolinols, as well as intermediates in their preparation, against Aspergillus niger, Aspergillus oryzae, Myrothecium verrucaria, Trichoderma viride, and Mucor cirinelloides was determined. 3,6-dichloro-8-quinolinol is the most fungitoxic analogue of this class of compounds observed to date
Uptake Routes Of Benzo[A]Pyrene In An Estuarine Killifish: Cytochrome P4501a Immunohistochemistry Using Whole Fish, Maria Karin Cochran
Uptake Routes Of Benzo[A]Pyrene In An Estuarine Killifish: Cytochrome P4501a Immunohistochemistry Using Whole Fish, Maria Karin Cochran
Dissertations, Theses, and Masters Projects
No abstract provided.
Expression Of Prelamin A Confers Sensitivity Of Dna Biosynthesis To Lovastatin On F9 Teratocarcinoma Cells, Michael Sinensky, T. Mclain, K. Fantle
Expression Of Prelamin A Confers Sensitivity Of Dna Biosynthesis To Lovastatin On F9 Teratocarcinoma Cells, Michael Sinensky, T. Mclain, K. Fantle
Faculty Publications, Biological Sciences
No abstract provided.
Nicotinic Acid Hydroxylase From Clostridium Barkeri: Electron Paramagnetic Resonance Studies Show That Selenium Is Coordinated With Molybdenum In The Catalytically Active Selenium-Dependent Enzymenicotinic Acid Hydroxylase From Clostridium Barkeri: Electron Paramagnetic Resonance Studies Show That Selenium Is Coordinated With Molybdenum In The Catalytically Active Selenium-Dependent Enzyme, Vadim Gladyshev, Sergei V. Khangulov, Thressa C. Stadtman
Nicotinic Acid Hydroxylase From Clostridium Barkeri: Electron Paramagnetic Resonance Studies Show That Selenium Is Coordinated With Molybdenum In The Catalytically Active Selenium-Dependent Enzymenicotinic Acid Hydroxylase From Clostridium Barkeri: Electron Paramagnetic Resonance Studies Show That Selenium Is Coordinated With Molybdenum In The Catalytically Active Selenium-Dependent Enzyme, Vadim Gladyshev, Sergei V. Khangulov, Thressa C. Stadtman
Vadim Gladyshev Publications
Nicotinic acid hydroxylase from Clostidum barkeri contains selenium in an unidentified form that is dissociated as a low molecular weight compound upon denaturation of the enzyme. Other cofactors of this enzyme are molybdopterin, FAD, and iron-sulfur clusters. In the current study, we show that the enzyme, as isolated, exhibits a stable Mo(V) electron paramagnetic resonance (EPR) sal ("resting" signal) and that this signal is correlated with the selenium content and nicotinate hydroxylase activity of the enzyme. Substitution of77Se for normal selenium isotope abundance results in splitting of the Mo(V) EPR signal of the native protein without affecting the iron signals …
Characteristics Of Modified Leghemoglobins Lsolated From Soybean (Glycine Max Merr.) Root Nodules, Hyung-Kyun Jun, Gautam Sarath, Jose F. Moran, Manuel Becana, Robert V. Klucas, Fred W. Wagner
Characteristics Of Modified Leghemoglobins Lsolated From Soybean (Glycine Max Merr.) Root Nodules, Hyung-Kyun Jun, Gautam Sarath, Jose F. Moran, Manuel Becana, Robert V. Klucas, Fred W. Wagner
Department of Biochemistry: Faculty Publications
Hemoprotein derivatives of an abundant soybean (Glycine max Merr.) root nodule leghemoglobin, Lba, were studied for their modified spectral characteristics and physical properties. Three modified hemoprotein derivatives of Lba (Lbam1, Lbam2, and Lbam3) were purified by preparative isoelectric focusing. The ferric forms of these pigments were green and exhibited anomalous spedra in the visible region as compared to the Lba3+ forms. These modified pigments showed a hypochromic shift of 10 nm for the charge transfer absorption maximum; however, differences were not apparent in the Sdret region. Upon binding with nicotinate, the α …
Global Phylogeography Of Yellowfin Tuna, Thunnus Albacares, And Mackerels Of The Genus Scomber, Daniel R. Scoles
Global Phylogeography Of Yellowfin Tuna, Thunnus Albacares, And Mackerels Of The Genus Scomber, Daniel R. Scoles
Dissertations, Theses, and Masters Projects
Intraspecific genetic relationships within yellowfin tuna, Thunnus albacares, and three mackerels of the genus Scomber were studied by restriction fragment length polymorphism (RFLP) analysis of mitochondrial DNA (mtDNA). The comparison of these scombrids, with different larval distributions, adult distributions, and vagilities, served to investigate the hypothesis that population structure in marine fishes results from geographic and physical oceanographic processes that limit dispersal of early life history stages. Samples of 20 yellowfin tuna were examined from each of five Pacific locations and one Atlantic location. MtDNA analysis with 12 informative restriction endonucleases demonstrated considerable genetic variation, as evidenced by overall nucleon …
Exopeptidase Catalyzed Site-Specific Bonding Of Supports, Labels And Bioactive Agents To Proteins, Fred W. Wagner, Thomas R. Coolidge, Dwane E. Wylie, Sheldon M. Schuster, William Lewis, Jay Stout
Exopeptidase Catalyzed Site-Specific Bonding Of Supports, Labels And Bioactive Agents To Proteins, Fred W. Wagner, Thomas R. Coolidge, Dwane E. Wylie, Sheldon M. Schuster, William Lewis, Jay Stout
Department of Biochemistry: Faculty Publications
The invention provides a means for attaching a label, support or bioactive agent to a protein with an exopeptidase at a site that is remote from the active site of the protein. More specifically the invention is directed to a method for the attachment of an amino acid, amine and alcohol nucleophile to the carboxyl terminus of a protein. In one embodiment, a labeled nucleophile is attached to a protein such as an antibody. In other embodiments, the invention is directed to a method for the attachment of a protein to an immobilization support and to a method for the …
Mitochondrial Dna Variation In Natural And Cultured Populations Of The Bay Scallop, Argopecten Irradians (Lamarck) And The Calico Scallop, Argopecten Gibbus (Dall), Sandra Grace Blake
Mitochondrial Dna Variation In Natural And Cultured Populations Of The Bay Scallop, Argopecten Irradians (Lamarck) And The Calico Scallop, Argopecten Gibbus (Dall), Sandra Grace Blake
Dissertations, Theses, and Masters Projects
No abstract provided.
Novel Suicide Elements For Gene Disruption In Escherichia Coli, Brian Christopher Nicholson
Novel Suicide Elements For Gene Disruption In Escherichia Coli, Brian Christopher Nicholson
Dissertations, Theses, and Masters Projects
No abstract provided.
Thermal Decomposition Studies Of Selected Transition Metal Polysulfide Complexes. Ii. Effect Of Atmosphere On Decomposition, Benjamin Rougeau, Mark Draganjac
Thermal Decomposition Studies Of Selected Transition Metal Polysulfide Complexes. Ii. Effect Of Atmosphere On Decomposition, Benjamin Rougeau, Mark Draganjac
Journal of the Arkansas Academy of Science
Initial studies involved the thermal decomposition profile of five polysulfide complexes in air up to 550 °C. Since our first report to the Academy in 1990, we have obtained the capability to run samples up to 1500°C under various gases. Thermal Gravimetric Analysis (TGA) and Differential Thermal Analysis (DTA)of a series of transition metal polysulfide complexes are presented. Compounds analyzed included Cp2TiS5 ,MoS9 2",MoOS8 2", Zn(S x ) 2", Cd(S x ) 2-, Fe2S122 - and NiS82.
Multisite Microprobes For Electrochemical Recordings In Biological Dynamics, G. Sreenivas, S. S. Ang, R. M. Ranade, A. S. Salian, W. D. Brown
Multisite Microprobes For Electrochemical Recordings In Biological Dynamics, G. Sreenivas, S. S. Ang, R. M. Ranade, A. S. Salian, W. D. Brown
Journal of the Arkansas Academy of Science
For over 30 years, techniques have been developed that allow for the microscale (10-30 /mum) measurement of chemical signals with high temporal resolution (1-200 Hz). Such measurements, called in vivo electrochemical recordings, allow for the direct determination of neurotransmitter molecules and related compounds in biological systems. Multiple recordings, simultaneously performed at different, closely spaced, well defined locations throughout a three-dimensional tissue volume in the brain, are of interest in neuroscience. Developments in microelectronic techniques enable the fabrication of multi-electrode microprobes for recording extracellular action potentials generated by individual neurons simultaneously. A high-yield microfabrication process has been successfully developed for the …
Effective, Reliable, Inexpensive Cryofixation Device, Lawrence A. Mink, Roger A. Buchanan
Effective, Reliable, Inexpensive Cryofixation Device, Lawrence A. Mink, Roger A. Buchanan
Journal of the Arkansas Academy of Science
No abstract provided.
Xenopus Laevis Ribosomal Protein S1: Evidence For Regulation At The Transcriptional Level, Cleve Ray-Dean Sinor
Xenopus Laevis Ribosomal Protein S1: Evidence For Regulation At The Transcriptional Level, Cleve Ray-Dean Sinor
Dissertations, Theses, and Masters Projects
No abstract provided.
Biogeochemical Control Of Phosphorus Cycling And Primary Production In Lake Michigan, R. S. Walsh, Gregory A. Cutter, W. M. Dunstan, J. Radford-Knoery, J. T. Elder
Biogeochemical Control Of Phosphorus Cycling And Primary Production In Lake Michigan, R. S. Walsh, Gregory A. Cutter, W. M. Dunstan, J. Radford-Knoery, J. T. Elder
OES Faculty Publications
A 3-yr study in Lake Michigan has shown a 27 mmol P m-2 increase in the mass of total P (TP) in the water during spring when the lake is mixed from surface to sediment. This value is an order of magnitude greater than the annual P input from external sources. TP changed in concert with increases in chlorophyll a and organic N and decreases in nitrate and soluble Si. The concentration of soluble reactive PO4-3 (SRP) remained relatively constant throughout the study. We hypothesize that the SRP concentration is maintained by a chemical equilibrium with calcium-phosphate …
An Analysis Of Mitochondrial Dna In Rett Syndrome And Other Neurodegenerative Disorders, Catherine Erickson Burgess
An Analysis Of Mitochondrial Dna In Rett Syndrome And Other Neurodegenerative Disorders, Catherine Erickson Burgess
Theses and Dissertations in Biomedical Sciences
Mitochondrial dysfunction resulting from mutations on mitochondrial DNA (mtDNA) is being recognized in a growing spectrum of diseases. These diseases, resulting from single base mutations, large deletions, or insertions, have been largely neuromuscular in origin. However, as an understanding of the effects of mtDNA mutations progresses, attention is now focusing on neurodegenerative diseases. Rett Syndrome (RS), a progressive neurodegenerative disease with predominantly female cases, demonstrates morphologic mitochondrial changes, mitochondrial enzyme deficiencies and maternal inheritance (characteristic of mtDNA diseases). No investigation of mtDNA involvement has been previously conducted and, to date, no biological marker exists for this disorder.
Our preliminary studies …
Subunit Interactions Of Recombinant Hiv-1 Reverse Transcriptase With Mutations At L289, Jacquelyn R. Smith
Subunit Interactions Of Recombinant Hiv-1 Reverse Transcriptase With Mutations At L289, Jacquelyn R. Smith
Theses and Dissertations in Biomedical Sciences
Reverse transcriptase (RT) is a dimeric enzyme required for replication of the human immunodeficiency virus (HIV). If the subunits of the RT dimer are dissociated, the enzyme is no longer active; therefore, identification of subunit binding sites could lead to potential targets for antiviral therapy. In order to identify where subunit binding of RT occurs, mutations were made at leucine (L) 289, a residue believed to be involved in dimerization through hydrophobic interactions with other leucines. L289 is the central leucine of a leucine repeat sequence which resembles a leucine zipper protein-DNA binding motif. Two mutations, leucine to arginine (L289R) …
Protein S-Thiolation And Dethiolation, James Thomas, Yuh-Cherng Chai, Che-Hun Jung
Protein S-Thiolation And Dethiolation, James Thomas, Yuh-Cherng Chai, Che-Hun Jung
Yuh-Cherng Chai
No abstract provided.
S-Thiolation And Irreversible Oxidation Of Sulfhydryls On Carbonic Anhydrase Iii During Oxidative Stress: A Method For Studying Protein Modification In Intact Cells And Tissues, C. Lii, Yuh-Cherng Chai, W. Zhao, James Thomas, S. Hendrich
S-Thiolation And Irreversible Oxidation Of Sulfhydryls On Carbonic Anhydrase Iii During Oxidative Stress: A Method For Studying Protein Modification In Intact Cells And Tissues, C. Lii, Yuh-Cherng Chai, W. Zhao, James Thomas, S. Hendrich
Yuh-Cherng Chai
No abstract provided.