Results 151 to 160 of about 18,112 (189)
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The structure of a galactan sulfate from the red seaweed Bostrychia montagnei
Carbohydrate Research, 2002The sulfated, methylated galactan isolated from the red seaweed Bostrychia montagnei, showed an unusually narrow structural dispersion. This agaran has the defining linear backbone of alternating 3-linked beta-D-galactopyranosyl units and 4-linked alpha-L-galactopyranosyl and 3,6-anhydrogalactopyranosyl residues.
Maria E R, Duarte +4 more
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International Journal of Biological Macromolecules, 2021
Polysaccharides from the red seaweed Gracilaria fisheri possess many functions, which include antioxidant, antiviral, and antibacterial activities. However, detailed data on their immunomodulatory activities are scarce. Here, we isolated sulfated galactans (SG) from G. fisheri. We found that the predominant SG from G.
Sunisa, Khongthong +5 more
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Polysaccharides from the red seaweed Gracilaria fisheri possess many functions, which include antioxidant, antiviral, and antibacterial activities. However, detailed data on their immunomodulatory activities are scarce. Here, we isolated sulfated galactans (SG) from G. fisheri. We found that the predominant SG from G.
Sunisa, Khongthong +5 more
openaire +2 more sources
Sulfated galactan is a catalyst of antithrombin-mediated inactivation of α-thrombin
Biochimica et Biophysica Acta (BBA) - General Subjects, 2008Novel compounds presenting anticoagulant activity, such as sulfated polysaccharides, open new perspectives in medicine. Elucidation of the molecular mechanism behind this activity is desirable by itself, as well as because it allows for the design of novel compounds.
Fábio R, Melo +4 more
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A precipitation reaction between certain human G immunoglobulins and sulfated galactans
Immunochemistry, 1971Abstract During electrophoresis, some pathological sera are seen to precipitate spontaneously in an agar gel and not in an agarose gel. Such sera come from G myelomas or malignant lymphomatosis cases. A similar precipitation is observed when either agaropectin or other sulfated galactans (but not other sulfated polysaccharides) are added to the same ...
P, Burtin, M C, Gendron
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Carbohydrate Research, 2004
A desulfation method using chlorotrimethylsilane for treatment of pyridinium salts of sulfated galactans was developed. It proved to be appropriate for desulfation of polysaccharides of both agar and carrageenan families. In order to evaluate its efficiency in presence of the maximum content of 3,6-anhydrogalactose, it was applied to commercial kappa ...
Adriana A Kolender, Maria C Matulewicz
exaly +3 more sources
A desulfation method using chlorotrimethylsilane for treatment of pyridinium salts of sulfated galactans was developed. It proved to be appropriate for desulfation of polysaccharides of both agar and carrageenan families. In order to evaluate its efficiency in presence of the maximum content of 3,6-anhydrogalactose, it was applied to commercial kappa ...
Adriana A Kolender, Maria C Matulewicz
exaly +3 more sources
A new sulfated β-galactan from clams with anti-HIV activity
Carbohydrate Research, 1999A new polysaccharide composed of galactan sulfate with a beta-(1-->3)-glycosidic linkage has been isolated from the marine clam species Meretrix petechialis. The polysaccharide was homogeneous in its composition containing D-galactose. The glycosidic linkage was examined by 2D DQF-COSY and 2D NOESY spectroscopy. The coupling constant of anomeric proton
C, Amornrut +7 more
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Carbohydrate Polymers, 2014
The anti-HMPV (human metapneumovirus) activity was determined for sulfated dl-hybrid galactans obtained from the red seaweed Cryptonemia seminervis and their depolymerized products obtained by reductive partial hydrolysis. Structural studies carried out in three homogeneous depolymerized fractions DS-1, DS-2e and DS-3 (Mw of 51.6-63.8 kDa) showed that ...
Miguel D Noseda +2 more
exaly +3 more sources
The anti-HMPV (human metapneumovirus) activity was determined for sulfated dl-hybrid galactans obtained from the red seaweed Cryptonemia seminervis and their depolymerized products obtained by reductive partial hydrolysis. Structural studies carried out in three homogeneous depolymerized fractions DS-1, DS-2e and DS-3 (Mw of 51.6-63.8 kDa) showed that ...
Miguel D Noseda +2 more
exaly +3 more sources
Structural and functional insights into sulfated galactans: a systematic review
Glycoconjugate Journal, 2009Sulfated galactans (SGs) are highly anionic marine galactose-composed homopolysaccharides. Although their structures vary among species, their main features are conserved among phyla. Green algal SGs are quite heterogeneous, although preponderantly composed of 3-beta-D-Galp units.
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Galactan sulfate of Grateloupia indica: Isolation, structural features and antiviral activity
Phytochemistry, 2007Natural compounds offer interesting pharmacological perspectives for antiviral drug development with regard to broad-spectrum antiviral properties and novel modes of action. In this study, we have analyzed polysaccharide fractions isolated from Grateloupia indica.
Kausik, Chattopadhyay +5 more
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A 2-sulfated, 3-linked α-l-galactan is an anticoagulant polysaccharide
Carbohydrate Research, 2002Marine alga is an abundant source of sulfated polysaccharides with potent anticoagulant activity. However, several attempts to identify the specific structural features in these compounds, which confer the biological activity, failed due to their complex, heterogeneous structure.
Mariana S, Pereira +3 more
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