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Polysaccharide

Biology PolyproteinPolysaccharides

Polysaccharide
(Science: biochemistry) polymers of (arbitrarily) more than about ten monosaccharide residues linked glycosidically in branched or unbranched chains.

 


Polysaccharides are relatively complex carbohydrates. They are polymers made up of many monosaccharides joined together by glycosidic bonds. They are therefore very large, often branched, macromolecules.

polysaccharide
a biological macromolecule composed of sugar subunits; examples include starch and glycogen
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...

Polysaccharides are large molecules composed of individual monosaccharide units. A common plant polysaccharide is starch (shown in Figure 12), which is made up of many glucoses (in a polypeptide these are referred to as glucans).

Polysaccharide Antigens
Some bacterial polysaccharides ingested by APCs
can be degraded in their lysosomes
and presented to T cells by MHC class II molecules.

polysaccharides Long chains of monosaccharide units bonded together; e.g., glycogen, starch, and cellulose. PICTURE ...

Polysaccharide. A polymer composed of multiple units of monosaccharide (simple sugar).

polysaccharide
A large carbohydrate molecule with a chainlike or branched structrure composed of many monosaccharides. Functions in storage (ex. starch, insulin, glycogen) or structre (ex. cellulose, chitin.) ...

Polysaccharide a long chain of monosaccharides joined by dehydration synthesis
(poly = many; sacchar = sugar)
Pons the closest‚ larger bulge at the top of the spinal cord
(pons = bridge) ...

Polysaccharides
Monosaccharides may be bonded together to form long chains called polysaccharides.
Starch and Glycogen ...

Polysaccharides Carbohydrates composed of large numbers of linear or branched monosaccharide units; homopolysaccharides are composed of large numbers of one type of sugar, whereas heteropolysaccharides contain more than one type.

Polysaccharides include glycogen, plant starch (amylose), cellulose, and chiton (a constituent of the shells of arthropods). They are all homopolymers meaning they are all made of only one sugar repeated over and over.

Polysaccharides are polymers of saccharides, formed by three or more monosaccharides joined by glycosidic linkages, as Amylose (unbranched starch), which is formed exclusively by molecules of Glucose, Amylopectin (branched starch), ...

polysaccharide A carbohydrate composed of many monosaccharide units, for example, glycogen, starch, and cellulose.
polysome Two or more ribosomes connected by a molecule of messenger RNA.

a polysaccharide can hybridize with a DNA strand
C.
a DNA strand can hybridize with another DNA strand ...

Though polysaccharides are also biopolymers, it is not so common to talk of 'sequencing' a polysaccharide, for several reasons. Although many polysaccharides are linear, many have branches.

starch - polysaccharide composed exclusively of glucose units, used as an energy store in plant cells.
steroids - hydrophobic molecule related to cholesterol. Many important hormones are steroids.

LPS
Lipopolysaccharide. A major componant of the outer layer of the outer membrane of Gram-negative bacteria.
Lysate
A solution containing progeny phage resulting from the lysis of a population of bacterial cells by infecting phage.

This layer of polysaccharide (sometimes proteins) protects the bacterial cell and is often associated with pathogenic bacteria because it serves as a barrier against phagocytosis by white blood cells.
outer membrane ...

Agarose gels: A polysaccharide gel used to measure the size of nucleic acids (in bases or base pairs). See "Gel Electrophoresis".

cellulose - a polysaccharide composed of glucose units that constitutes the primary part of the cell walls of plants ...

When do they form polysaccharides?
Quorum sensing may be involved in helping them turn on the synthesis of polysaccharides in proteins that glue the biofilm together. Then the bacteria grow just like they do in conventional cultures.

acetobutylicum contains a variety of genes involved in the utilization of polysaccharides such as starch, hemicelluose and cellulose.

In addition, the Golgi apparatus manufactures a variety of macromolecules on its own, including a variety of polysaccharides.

laminarin -- a beta-glucan polysaccharide produced by many chromists through photosynthesis.
lipids -- a class of biochemical compounds which includes fats, oils, and waxes.

The substance in which animal tissue cells are embedded; consists of protein and polysaccharides.
extraembryonic membranes
Four membranes (yolk sac, amnion, chorion, allantois) that support the developing embryo in reptiles, birds, and mammals.

See also: Cells, Protein, Molecule, Trans, Organ