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Precipitation of galactose-specific lectins by complex-type oligosaccharides and glycopeptides: studies with lectins from Ricinus communis (agglutinin I), Erythrina indica, Erythrina arborescens, Abrus precatorius (agglutinin), and Glycine max (soybean).
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We have recently demonstrated that certain oligomannose and bisected hybrid type glycopeptides and bisected complex type oligosaccharides are bivalent for binding to concanavalin A and can precipitate the lectin [Bhattacharyya, L., Ceccarini, C., Lorenzoni, P., & Brewer, C.F. (1987) J. Biol. Chem.
Characterization of alpha-mannosidase from Erythrina indica seeds and influence of endogenous lectin on its activity.
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alpha-mannosidase from Erythrina indica seeds is a Zn(2+) dependent glycoprotein with 8.6% carbohydrate. The enzyme has a temperature optimum of 50 degrees C and energy of activation calculated from Arrhenius plot was found to be 23 kJ mol(-1). N-terminal sequence up to five amino acid residues was
A new mitogenic D-galactosephilic lectin isolated from seeds of the coral-tree Erythrina corallodendron. Comparison with Glycine max (soybean) and Pseudomonas aeruginosa lectins.
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The lectin of Erythrina corallodendron (Caesalpiniaceae) seeds was purified by heating, ammonium sulfate fractionation, and affinity chromatography on acid-treated Sepharose. The purified lectin is similar to the soybean lectin in being a glycoprotein of molecular weight around 110 000 - 120 000 and
Formation of homogeneous carbohydrate-lectin cross-linked precipitates from mixtures of D-galactose/N-acetyl-D-galactosamine-specific lectins and multiantennary galactosyl carbohydrates.
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Quantitative precipitation studies have shown that the Man/Glc-specific lectin concanavalin A (ConA) forms homogeneous (homopolymeric) cross-linked precipitates with individual asparagine-linked oligomannose and bisected hybrid-type glycopeptides in the presence of binary mixtures of the
Cross-linking activity of the 14-kilodalton beta-galactoside-specific vertebrate lectin with asialofetuin: comparison with several galactose-specific plant lectins.
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We have previously shown that plant lectins with a wide range of carbohydrate binding specificities can bind and cross-link (precipitate) specific multiantennary oligosaccharides and glycopeptides [cf. Bhattacharyya, L., Fant, J., Lonn, H., & Brewer, C. F. (1990) Biochemistry 29, 7523-7530]. This
Electron spin echo envelope modulation studies of lectins: evidence for a conserved Mn(2+)-binding site.
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Electron spin echo envelope modulation (ESEEM) experiments have been used to investigate the Mn(2+)-binding site in a series of lectins including concanavalin A, pea lectin (Pisum sativum), isolectin A from lentil (Lens culinaris), soybean agglutinin (Glycine max), Erythrina indica lectin, and Lotus
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
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
Differentiation of Helicobacter pylori isolates based on lectin binding of cell extracts in an agglutination assay.
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Plant and animal lectins with various carbohydrate specificities were used to type 35 Irish clinical isolates of Helicobacter pylori and the type strain NCTC 11637 in a microtiter plate assay. Initially, a panel of eight lectins with the indicated primary specificities were used: Anguilla anguilla
Regulation and symbiotic significance of nodulation outer proteins secretion in Sinorhizobium fredii HH103.
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In this work we show that the Sinorhizobium fredii HH103 ttsI gene is essential for the expression of the tts genes and secretion of nodulation outer proteins (Nops). Moreover, we demonstrate for the first time, to our knowledge, that the nod box preceding ttsI is necessary for Nops secretion. TtsI
Lectin binding sites on CD34+ human haematopoietic stem cells and lymphocytes from peripheral blood: an ultrastructural post-embedding study.
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This study was performed to obtain a better insight into the glycosylation pattern of human CD34+ haematopoietic stem cells and lymphocytes from peripheral blood using an ultrastructural post-embedding technique. Lectins applied were derived from Canavalia ensiformis (Con A), Triticum vulgare (WGA),
Galactose-containing glycoconjugates of the iris, the aqueous outflow passages and the cornea in capsular glaucoma. A lectin histochemical study.
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BACKGROUND
The aim of the study was to compare galactose-containing glycoconjugates of the iris, the aqueous outflow passages and the cornea with exfoliation material in capsular glaucoma.
METHODS
Six formalin-fixed, paraffin-embedded human eyes with capsular glaucoma and six control eyes were
Carbohydrate and peptide antigens in macrophage populations derived from human bone marrow and milk: an immunomorphological and immunochemical analysis.
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An immunomorphological and immunochemical study was performed to elucidate the pattern of carbohydrate antigens and their relationships to the cluster differentiation (CD) 68 epitopes on macrophages derived from human bone marrow and milk. Core and backbone antigens recognized by lectins from
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,
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