Dictionary > Octose

Octose

Definition
noun, plural: octoses
An eight -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, an octose is a monosaccharide with eight 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 aldooctose would be an octose with an aldehyde group. A ketooctose, in contrast, would be an octose with a ketone functional group.
Octoses have a chemical formula of C8H16O8. An example is methylthiolincosamide, i.e. the sugar moiety of the antimicrobial agent lincomycin A. This antibiotic has been used to treat Gram-positive infections. The ostose moiety is linked to an amino acid derivative (i.e. propulhygric acid) via an amide bond. The biosynthesis of lincomycin involves a metabolic pathway comprised of two phases. In the first phase, methylthiolincosamide and propylproline are produced separately. They are condensed to form N-demethylincomycin. This is then methylated through S-adenosylmethionine.
Word origin: oct(o)– (“eight”) + –ose (relating to sugars)
See also:


You will also like...

Growth and Plant Hormones
Growth and Plant Hormones

Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..

green plant cells
Plant Cells vs. Animal Cells

Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

Gene Pool and Speciation
The Gene Pool and Population Genetics

According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

A sperm cell fertilizing an ovum
Human Reproduction and Fertilization

For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

Community Patterns

Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

An artist depiction of a Precambrian multicellular life form.
The Evolution of Cell Organelles

The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..

Related Articles...

No related articles found

See all Related Topics