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Página 1 desde 36 resultados
Topological and functional characterization of the N-glycans of soybean (Glycine max) agglutinin.
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Soybean agglutinin (SBA), is a noncovalently bound tetramer comprised of four identical subunits having a single N-glycan chain, Man9GlcNAc2, that is known to be essential for regeneration of the functional tetrameric structure from unfolded subunits. In this study, SBA was found to have strong
Structural analysis of N-glycans of storage glycoproteins in soybean (Glycine max. L) seed.
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The structures of N-linked sugar chains (N-glycans) of storage glycoproteins in soybean seeds have been identified. Eight pyridylaminated (PA-) N-linked sugar chains were derived and purified from hydrazinolysates of the storage glycoproteins by reverse-phase HPLC and size-fractionation HPLC. The
Ultrastructural studies of glycan changes in the apical surface of the uterine epithelium during pre-ovulatory and and pre-implantation stages in the marmoset monkey.
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It has been postulated that carbohydrates are involved in a variety of cell-cell interactions including blastocyst implantation. In primates, there are only limited investigations on the ultrastructural localisation of the cyclic changes in uterine epithelial surface carbohydrates. Our aim was to
Glycan localization within the human interphotoreceptor matrix and photoreceptor inner and outer segments.
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Glycoconjugates are likely to be of fundamental importance in the complex interactions between photoreceptors and the retinal pigment epithelium, but few have been characterized, especially in human tissue. As a preliminary step towards determining their biological functions in health and disease, a
Galectin-1-mediated cell adhesion, invasion and cell death in human anaplastic large cell lymphoma: regulatory roles of cell surface glycans.
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Galectin-1 is known to be one of the extracellular matrix proteins. To elucidate the biological roles of galectin-1 in cell adhesion and invasion of human anaplastic large cell lymphoma, we performed cell adhesion and invasion assays using the anaplastic large cell lymphoma cell line H-ALCL, which
Lectin-histochemical analysis of glycans in ovine and bovine near-term placental binucleate cells.
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Chorionic binucleate cells (BNC) occur in several ruminants including cow, deer, goat and sheep. They migrate through the chorionic tight junction to fuse with uterine epithelial cells and discharge their granules into maternal connective tissue. We have compared the BNC of near-term,
Changes in glycan distribution within the porcine interhaemal barrier during gestation.
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Changing patterns of glycan distribution are described in porcine placentae at 15, 19, 26, 43, 58, 69 and 109 days gestation, using a carefully selected panel of lectins that allowed partial analysis of saccharide classes and sequences. The lectins used were from Galanthus nivalis, Pisum sativum,
Glycans with N-acetyllactosamine type 2-like residues covering adult Schistosoma mansoni, and glycomimesis as a putative mechanism of immune evasion.
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Glycans at the surface of adult Schistosoma mansoni were investigated with gold-labelled lectins. The fragile complex of the glycans with the outer membranes could be preserved for electron microscopy by avoiding extensive pre-fixation with aldehydes and by introducing osmium-ferrocyanide as a
Root Border Cells and Mucilage Secretions of Soybean, Glycine Max (Merr) L.: Characterization and Role in Interactions with the Oomycete Phytophthora Parasitica
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Root border cells (BCs) and their associated secretions form a protective structure termed the root extracellular trap (RET) that plays a major role in root interactions with soil borne microorganisms. In this study, we investigated the release and morphology of BCs of Glycine max using light
A new peptide-N4-(acetyl-beta-glucosaminyl)asparagine amidase from soybean (Glycine max) seeds: purification and substrate specificity.
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We report here the isolation and characterization of a peptide-N4-(acetyl-beta-glucosaminyl) asparagine amidase (peptide: N-glycanase) from soybean (Glycine max) seeds. The enzyme was purified to homogeneity with 6.5% yield from defatted soybean meal extract by ion-exchange chromatography, gel
Plant N-glycan processing enzymes employ different targeting mechanisms for their spatial arrangement along the secretory pathway.
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The processing of N-linked oligosaccharides in the secretory pathway requires the sequential action of a number of glycosidases and glycosyltransferases. We studied the spatial distribution of several type II membrane-bound enzymes from Glycine max, Arabidopsis thaliana, and Nicotiana tabacum.
Purification and characterization of novel cationic peroxidases from Asparagus acutifolius L. with biotechnological applications.
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Four novel basic peroxidases, named AaP-1, AaP-2, AaP-3, and AaP-4, were purified from Asparagus acutifolius L. seeds by cation-exchange and gel filtration chromatographies. The four proteins showed a similar electrophoretic mobility of 46 kDa while, by MALDI-TOF MS, different Mr values of 42758.3,
Molecular and structural analysis of electrophoretic variants of soybean seed storage proteins.
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Soybean (Glycine max L.) storage proteins are composed mainly of two major components, beta-conglycinin and glycinin. Electrophoretic variants of the beta subunit of beta-conglycinin and the A3 polypeptide of glycinin were detected on SDS-PAGE, and designated them as beta* and A3*, respectively.
The glycosylation pattern of secretory granules in binucleate trophoblast cells is highly conserved in ruminants.
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The binucleate trophoblast cells (BNCs) in the ruminant placenta are a unique feature of this taxon. These cells produce several secretory proteins and transfer these across the fetomaternal barrier into the dam. We used lectin histochemistry with a panel of 24 lectins to characterise the
First trimester histiotrophe shows altered sialylation compared with secretory phase glycoconjugates in human endometrium.
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OBJECTIVE
Histiotrophe is now recognized as being an important feature of early human pregnancy, providing nutrients and growth factors to the developing embryo. Our aim was to examine the glycan composition of histiotrophe from first trimester decidua and to compare it with secretions present in
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