Volutin

Definition

Volutin, also known as metachromatic granules, are intracellular storage bodies found in some bacteria and yeasts. They store inorganic polyphosphate, which can be used for energy and other cellular processes.

5 Must Know Facts For Your Next Test

1. Volutin granules are composed primarily of polyphosphate.
2. They appear red or blue when stained with certain dyes like methylene blue due to their metachromatic properties.
3. Volutin is commonly found in bacteria such as Corynebacterium diphtheriae.
4. These granules serve as a phosphate reserve that can be utilized during periods of nutrient deficiency.
5. The presence of volutin can be an important diagnostic feature for identifying certain bacterial species.

Related terms

Polyphosphate: A linear polymer of many phosphate units linked by high-energy bonds.

Metachromasia: A staining reaction where a dye changes color when it binds to certain substances.

Corynebacterium diphtheriae:

A bacterium known to contain volutin granules and cause the disease diphtheria.