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Pàgina 1 des de 506 resultats
[Cold resistance of four evergreen broad-leaved tree species].
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The leaves of four evergreen plants, i.e., Fatsia japonica, Nerium indicum, Mahonia bealei and Acer cinnamomifolium were used as the experimental materials. By measuring the changes of in vitro leaf in soluble sugar, soluble protein, free proline, POD activity, chlorophyll content and relative
Basic amino acids preferring broad specificity aminopeptidase from human erythrocytes.
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An aminopeptidase hydrolyzing 2-naphthylamides of Lys, Arg, Leu, Met, Phe and Tyr, as well as different di- to tridecapeptides, was purified from the cytosol of human erythrocytes. The enzyme showed preference for Lys and Arg at N-terminus, as proline and D-amino acids were nonpermissive at P1'
Polypeptide composition and amino-terminal sequence of broad bean polyphenoloxidase.
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Polyphenoloxidase was purified from broad bean (Vicia faba) leaves. The purified enzyme contained two immunocross-reactive proteins of approximately 60 to 65 and 43 to 45 kilodaltons. Further electrophoretic separation resolved these proteins into doublets with molecular mass of 61.5, 60, 44.5, and
Cloning and expression of amino acid transporters from broad bean.
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This work describes the isolation of a full-length (VfAAP2) and three partial amino acid transporter genes (VfAAPa, VfAAPb, VfAAPc) from broad bean (Vicia faba L.). The function of VfAAP2 was tested by heterologous expression in a yeast mutant deficient in proline uptake. VfAAP2 mediates
Global analysis of proline-rich tandem repeat proteins reveals broad phylogenetic diversity in plant secretomes.
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Cell walls, constructed by precisely choreographed changes in the plant secretome, play critical roles in plant cell physiology and development. Along with structural polysaccharides, secreted proline-rich Tandem Repeat Proteins (TRPs) are important for cell wall function, yet the evolutionary
Quantifying missing (phospho)proteome regions with the broad-specificity protease subtilisin.
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Despite huge efforts to map the human proteome using mass spectrometry the overall sequence coverage achieved to date is still below 50%. Reasons for missing areas of the proteome comprise protease-resistant domains including the lack/excess of enzymatic cleavage sites, nonunique peptide sequences,
Metabolomics reveals broad-scale metabolic perturbations in hyperglycemic mothers during pregnancy.
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OBJECTIVE To characterize metabolites across the range of maternal glucose by comparing metabolomic profiles of mothers with high and low fasting plasma glucose (FPG). RESEARCH DESIGN AND METHODS We compared fasting serum from an oral glucose tolerance test at ∼28 weeks' gestation from 67 Northern
Flavor Compounds in Pixian Broad-Bean Paste: Non-Volatile Organic Acids and Amino Acids.
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Non-volatile organic acids and amino acids are important flavor compounds in Pixian broad-bean paste, which is a traditional Chinese seasoning product. In this study, non-volatile organic acids, formed in the broad-bean paste due to the metabolism of large molecular compounds, are qualitatively and
A new, broad-substrate-specificity aminopeptidase from the dairy organism Lactobacillus helveticus SBT 2171.
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An aminopeptidase with a very broad substrate specificity was purified to homogeneity from Lactobacillus helveticus SBT 2171 by FPLC. The enzyme was purified 144-fold from a cell-free extract with a yield of 16%. The purified enzyme appeared as a single band on an SDS-PAGE gel. It had a molecular
The diversity of the proline-rich domain of pneumococcal surface protein A (PspA): Potential relevance to a broad-spectrum vaccine.
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Pneumococcal surface protein A (PspA) is a surface exposed, highly immunogenic protein of Streptococcus pneumoniae. Its N-terminal α-helical domain (αHD) elicits protective antibody in humans and animals that can protect mice from fatal infections with pneumococci and can be detected in vitro with
Oxidative stress and DNA damage in broad bean (Vicia faba L.) seedlings induced by thallium.
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Thallium (Tl) is a metal of great toxicological concern because it is highly toxic to all living organisms through mechanisms that are yet poorly understood. Since Tl is accumulated by important crops, the present study aimed to analyze the biological effects induced by bioaccumulation of Tl in
Amino acid transport by prosthecae of Asticcacaulis biprosthecum: evidence for a broad-range transport system.
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Prosthecae purified from cells of Asticcaulis biprosthecum possess active transport systems that transport all 20 amino acids tested. Using ascorbate-reduced phenazine methosulphate in the presence of oxygen, all 20 amino acids are accumulated against a concentration gradient by isolated prosthecae.
Human stratum corneum proteomics reveals cross-linking of a broad spectrum of proteins in cornified envelopes.
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Defects in keratinocyte transglutaminase (TGM1), resulting in an improper protein scaffold for deposition of the lipid barrier, comprise a major source of autosomal recessive congenital ichthyosis. For that reason, the composition and formation of the cornified (cross-linked) protein envelope of the
Hydrolysis of alphas1- and beta-casein-derived peptides with a broad specificity aminopeptidase and proline specific aminopeptidases from Lactococcus lactis subsp. cremoris AM2.
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Aminopeptidase hydrolysis of alpha(s)1 - and beta-casein-derived synthetic peptides containing non-consecutive and consecutive proline residues was characterised. Aminopeptidase P (Pep P) (EC 3.4.11.9) or post-proline dipeptidyl aminopeptidase (PPDA) (EC 3.4.14.5) along with lysine-paranitroanilide
The SNF5 protein of Saccharomyces cerevisiae is a glutamine- and proline-rich transcriptional activator that affects expression of a broad spectrum of genes.
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The Saccharomyces cerevisiae SNF5 gene affects expression of both glucose- and phosphate-regulated genes and appears to function in transcription. We report the nucleotide sequence, which predicts that SNF5 encodes a 102,536-dalton protein. The N-terminal third of the protein is extremely rich in
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