نتایج جستجو برای: lectin
تعداد نتایج: 15656 فیلتر نتایج به سال:
Arbutin, a natural glycoside, is well known as commercial tyrosinase inhibitor, and thus, to prevent pigmentary disorders of skin. In fact, involved in the biosynthesis melanin, skin main pigment. However, arbutin subject hydrolysis, which limits its bioactivity. general, thioglycosides are be very resistant both chemical enzymatic increases interaction time with their biological targets. A bio...
The subunit of the Vicia graminea lectin with blood-group-N specificity was examined by sodium dodecyl sulphate/polyacrylamide-gel electrophoresis and gel filtration in 6M-guanidinium chloride, and its molecular weights was found to be 25 000. The unique N-terminal sequence fof the first nine residues of the lectin confirmed that Vicia lectin consists of four identical chains non-covalently lin...
The Aleuria aurantia lectin (AAL) derived from orange peel fungus contains five fucose-binding sites that recognizes fucose bound in α-1,2, α-1,3, α-1,4, and α-1,6 linkages to N-acetylglucosamine and galactose. Recently, we have created several recombinant AAL (rAAL) proteins that had altered binding affinity to fucose linkages. In this report, we further characterize the binding specificity of...
A novel mammalian lectin activity responsive to monocytic differentiation is described in the human promyelocytic leukemia cell line HL-60. Glycoprotein binding indicates that the lectin recognizes both N-acetylneuraminic acid and galactose-terminating biantennary oligosaccharide structures. Lectin activity is independent of calcium and appears to reside in a Mr 17,000 intracellular membrane pr...
The binding of fluorescein-conjugated lentil lectin and concanavalin A to the surface membrane of human peripheral blood lymphocytes was studied by flow cytometry. The lymphocytes bound 3-fold more lentil lectin molecules compared with concanavalin A molecules and lentil lectin binding approached saturation at a much lower concentration than did that of concanavalin A. Lentil lectin identified ...
A lectin was isolated from root tubers of winter aconite (Eranthis hyemalis) by affinity chromatography on fetuin-agarose, and it was partially characterized with respect to its biochemical, physicochemical and carbohydrate-binding properties. The Eranthis hyemalis lectin is a dimeric protein (Mr 62000) composed of two different subunits of Mr 30000 and 32000, held together by disulphide bonds....
Parkia platycephala lectin 2 was purified from Parkia platycephala (Leguminosae, Mimosoideae) seeds by affinity chromatography and RP-HPLC. Equilibrium sedimentation and MS showed that Parkia platycephala lectin 2 is a nonglycosylated monomeric protein of molecular mass 29 407+/-15 Da, which contains six cysteine residues engaged in the formation of three intramolecular disulfide bonds. Parkia ...
A divalent cation-independent lectin-HOL-18, with cytotoxic activity against leukemia cells, was purified from a demosponge, Halichondria okadai. HOL-18 is a 72 kDa tetrameric lectin that consists of four non-covalently bonded 18 kDa subunits. Hemagglutination activity of the lectin was strongly inhibited by chitotriose (GlcNAcβ1-4GlcNAcβ1-4GlcNAc), fetuin and mucins from porcine stomach and bo...
A lectin detected in haemolymph from the Australian spiny lobster Panulirus cygnus agglutinated human ABO Group A cells to a higher titre than Group O or B. The lectin also agglutinated rat and sheep erythrocytes, with reactivity with rat erythrocytes strongly enhanced by treatment with the proteolytic enzyme papain, an observation consistent with reactivity via a glycolipid. The lectin, purifi...
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