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Pàgina 1 des de 1825 resultats
Broad spectrum antiangiogenic treatment for ocular neovascular diseases.
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Pathological neovascularization is a hallmark of late stage neovascular (wet) age-related macular degeneration (AMD) and the leading cause of blindness in people over the age of 50 in the western world. The treatments focus on suppression of choroidal neovascularization (CNV), while current approved
N-(jasmonoyl)tyrosine-derived compounds from flowers of broad beans (Vicia faba).
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Two new amide-linked conjugates of jasmonic acid, N-[(3R,7R)-(-)-jasmonoyl]-(S)-dopa (3) and N-[(3R,7R)-(-)-jasmonoyl]-dopamine (5), were isolated in addition to the known compound N-[(3R,7R)-(-)-jasmonoyl]-(S)-tyrosine (2) from the methanolic extract of flowers of broad bean (Vicia faba). Their
Endocrine side effects of broad-acting kinase inhibitors.
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Targeted therapy in oncology consists of drugs that specifically interfere with abnormal signaling pathways that are dysregulated in cancer cells. Tyrosine kinase inhibitors (TKIs) take advantage of unique oncogenes that are activated in certain types of cancer, and also target common mechanisms of
Proton-Peptide Co-Transport in Broad Bean Leaf Tissues.
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The transport of [14C]glycyl-glycine (Gly-Gly) has been characterized in leaf discs from mature exporting leaves of broad bean (Vicia faba L.). In terms of glycine (Gly) equivalents, the rate of transport of Gly-Gly was similar to that of Gly uptake. Uptake of Gly-Gly was localized mainly in the
Broad-Spectrum Regulation of Nonreceptor Tyrosine Kinases by the Bacterial ADP-Ribosyltransferase EspJ.
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Tyrosine phosphorylation is key for signal transduction from exogenous stimuli, including the defense against pathogens. Conversely, pathogens can subvert protein phosphorylation to control host immune responses and facilitate invasion and dissemination. The bacterial effectors EspJ and SeoC are
Aspartate aminotransferase in Leishmania is a broad-spectrum transaminase.
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The substrate specificity of aspartate aminotransferase (ASAT, E.C. 2.6.1.1.) from Leishmania was examined following observations of artefacts on gels stained for alanine aminotransferase (ALAT, E.C. 2.6.1.2.) after thin-layer starch-gel electrophoresis. Leishmanial ASAT acted on L-aspartate,
The broad clinical phenotype of Type 1 diabetes at presentation.
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Immune-mediated (auto-immune) Type 1 diabetes mellitus is not a homogenous entity, but nonetheless has distinctive characteristics. In children, it may present with classical insulin deficiency and ketoacidosis at disease onset, whereas autoimmune diabetes in adults may not always be insulin
Effects of broad-spectrum antimycobacterial therapy on chronic pulmonary sarcoidosis.
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BACKGROUND
Sarcoidosis is an idiopathic, granulomatous disease for which molecular and immunologic studies have shown an association between it and mycobacterial antigens. Microbial antigens can reduce expression of the tyrosine kinase Lck, which has been associated with sarcoidosis severity. Here
Broad substrate tolerance of tubulin tyrosine ligase enables one-step site-specific enzymatic protein labeling.
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The broad substrate tolerance of tubulin tyrosine ligase is the basic rationale behind its wide applicability for chemoenzymatic protein functionalization. In this context, we report that the wild-type enzyme enables ligation of various unnatural amino acids that are substantially bigger than and
Delphinidin inhibits a broad spectrum of receptor tyrosine kinases of the ErbB and VEGFR family.
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Delphinidin has been reported to inhibit EGFR signalling. To determine whether other receptor tyrosine kinases (RTKs) are also influenced by delphinidin, we examined its ability to inhibit the kinase activity of EGFR, ErbB2, VEGFR-2, VEGFR-3 and IGF1R in a cell-free test system. We found that
Random coil chemical shifts for serine, threonine and tyrosine phosphorylation over a broad pH range.
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Phosphorylation is one of the main regulators of cellular signaling typically occurring in flexible parts of folded proteins and in intrinsically disordered regions. It can have distinct effects on the chemical environment as well as on the structural properties near the modification site. Secondary
Broad spectrum receptor tyrosine kinase inhibitor, SU6668, sensitizes radiation via targeting survival pathway of vascular endothelium.
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OBJECTIVE
Recent studies have demonstrated radiosensitization by inhibiting receptor tyrosine kinases (RTKs). Irradiation activates RTKs and their downstream prosurvival molecule, Akt. In this study, we investigated the mechanism by which SU6668, an inhibitor of RTKs involved in angiogenic pathways,
Recombinant tyrosine aminotransferase from Trypanosoma cruzi: structural characterization and site directed mutagenesis of a broad substrate specificity enzyme.
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The gene encoding tyrosine aminotransferase (TAT, EC 2.6.1.5) from the parasitic protozoan Trypanosoma cruzi was amplified from genomic DNA, cloned into the pET24a expression vector and functionally expressed as a C-terminally His-tagged protein in Escherichia coli BL21(DE3)pLysS. Purified
Cloning and heterologous expression of a broad specificity aminotransferase of Leishmania mexicana promastigotes1.
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We have previously reported that Leishmania mexicana promastigotes possess a broad substrate specificity aminotransferase (BSAT), able to transaminate aspartate, aromatic amino acids, methionine and leucine. We have confirmed now this unusual substrate specificity by cloning its gene and expressing
Isolation and partial characterization of a broad specificity aminotransferase from Leishmania mexicana promastigotes.
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A broad specificity aminotransferase (BSAT), with high activity with both, aromatic amino acids and aspartate as substrates, was purified to homogeneity from promastigotes of Leishmania mexicana by a method involving chromatography on DEAE-cellulose, Red-120-Sepharose and Mono Q, and gel filtration
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