ergosterol
Definition
Noun: A white, crystalline sterol (C₂₈H₄₄O) found especially in yeast, fungi, ergot, and some plants. It is a provitamin that is converted into vitamin D₂ when exposed to ultraviolet radiation.
Usage
Ergosterol is a specific biochemical compound. It is used primarily in scientific, nutritional, and medical contexts. * Ergosterol is a major component of fungal cell membranes. * When ergosterol in foods like mushrooms is exposed to sunlight, it produces vitamin D. * Some antifungal drugs work by inhibiting the synthesis of ergosterol.
Examples
- Scientists studied the ergosterol content in different yeast strains.
- The conversion of ergosterol into vitamin D₂ is a photochemical reaction.
- The drug targets an enzyme crucial for ergosterol production in the pathogen.
Advanced Usage
- Biomarker Use: In environmental science, ergosterol is sometimes measured as a biomarker to estimate living fungal biomass in soil or plant material.
- Pharmaceutical Context: Discussions of antifungal mechanisms often center on ergosterol biosynthesis or its role in membrane integrity.
Variants and Related Words
- Provitamin D₂: Another name for ergosterol, highlighting its function as a precursor to vitamin D₂.
- Sterol: The broader class of organic compounds to which ergosterol belongs. Cholesterol is another well-known sterol.
- Vitamin D₂ (Ergocalciferol): The form of vitamin D produced when ergosterol is irradiated with ultraviolet light.
Synonyms
- Provitamin D₂
Antonyms
- There is no direct antonym for a specific chemical compound. In a functional sense, a compound that vitamin D formation could be considered opposite in action.
Related Phrases / Collocations
- Ergosterol biosynthesis: The metabolic pathway that produces ergosterol.
- Ergosterol content: The amount of ergosterol present in a substance.
- Ergosterol pathway: Refers to the series of enzymatic steps to create ergosterol, often a target for antifungals.
- Inhibit ergosterol synthesis: A common mode of action for antifungal medications.
Noun
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a plant sterol that is converted into vitamin D by ultraviolet radiation
