Dictionary > Heptose

Heptose

Definition
noun, plural: heptoses
A seven-carbon monosaccharide or sugar
Supplement
Monosaccharides are the simplest form of carbohydrates. They are classified according to the number of carbon atoms in a monosaccharide. In particular, a heptose is a monosaccharide with seven carbon atoms. Monosaccharides may also be classified based on the type of carbonyl group they contain. An aldose is a monosaccharide that contains an aldehyde group (-CHO) at position 1 whereas a ketose is one that contains a ketone (C=O) at position 2. Thus, an aldoheptose is a heptose with an aldehyde group. A ketoheptose, in contrast, is a heptose with a ketone functional group located in position 2.
Aldoheptoses have five chiral centers. An example of a naturally-occurring aldoheptose is L-glycero-D-manno-heptose. It is a heptose with a chemical formula of C7H14O7. It is an intermediate in lipid A biosynthesis. It occurs in plants, e.g. carrots, apricots, and apples.
Ketoheptoses have four chiral centers. An example of a naturally-occurring ketoheptose is sedoheptulose. It has a chemical formula of C7H14O7. It is an early intermediate in lipid A biosynthesis. It is found in alfalfa, avocado, and fig. Another example of a ketoheptose is mannoheptulose. It is a heptose found in avocados.
Word origin: hept(a)– (“seven”) + –ose (relating to sugars)
See also:


You will also like...

Cell Respiration
Cell Respiration

Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

Selective Breeding
Selective Breeding

Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..

Consciousness and behavior
Consciousness and Behavior

Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

primitive arthropods
Arthropods

The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

Human gastrointestinal tract
Human Biology – Food and Digestion

This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

Fossil trilobite imprint in the sediment
Insects

There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

Related Articles...

No related articles found

See all Related Topics