BioScience Dictionary

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Found Oligosaccharide 4 times.

Displaying results 1 to 10.

1. ABO blood group (blood type, blood typing)
A system of describing the oligosaccharide antigen s found on the surface of human blood cells. According to the type of antigen present, a person may be assigned a blood type of A, B, AB or O. A second type of antigen, the Rh factor , renders a "positive" or "negative" blood type. The ABO blood group system is important because it determines who can donate blood to or accept blood from whom. Type A or AB blood will cause an immune reaction in people with type B blood, and type B and AB blood will cause a reaction in people with type A blood. Conversely, type O blood has no A or B antigens, so people with type O blood are "universal donors." And since AB blood already produces both antigens, people who are type AB can accept any of the other blood types without suffering an immune reaction. The ABO system is also important because it can be used in paternity suits to rule out whether a man is the father of a certain child or not.

2. Amylase
There are two commercially-used forms of this starch-hydrolyzing enzyme : * alpha amylase breaks the alpha-1,4-glucosidic bonds of starch to yield oligosaccharide s. Slightly different versions of this enzyme are produced by the bacteria Bacillus amyloliquefaciens, B. licheniformis, B. subtilis and the fungus Aspergillus oryzae. Alpha amylase is used to make corn syrup, beer, wallpaper removers, cold-soluble laundry starch, and digestive aids. * beta amylase has exo-alpha-1,4-glucanase activity and acts on linear alpha-1,4-linked glucans, breaking alternate bonds to form maltose. This enzyme is found in most plants but is rare in fungi and bacteria; it is the amylase produced by germinating barley, which is used in beer production.

3. Ganglioside
A sphingolipid that is commonly found in nerve tissue; it contains complex oligosaccharide s as head groups.

4. Oligosaccharide
A molecule made up of several simple sugar groups joined by glycosidic bonds.