What is a precursor in chemistry?
a chemical that is transformed into another compound, as in the course of a chemical reaction, and therefore precedes that compound in the synthetic pathway: Cholesterol is a precursor of testosterone. …
What are precursors in biology?
Precursor: Forerunner. The term “precursor” is applied to an inactive substance converted to an active one (such as an enzyme, vitamin, or hormone). The term “precursor” applies to any chemical that is transformed into another.
What is the difference between precursor and substrate?
As nouns the difference between precursor and substrate is that precursor is that which precurses, a forerunner, a predecessor, an indicator of approaching events while substrate is .
What is the use of precursors?
What are the licit uses of precursors? Precursor chemicals are required in many areas of the chemical industry, phar- maceuticals, cosmetics, perfumes, cleaning agents, pesti- cides, insecticides, fertilizers, lubricants, explosives as well as in various other industries (textiles, leather, etc.).
What is defined as a precursor?
1a : one that precedes and indicates the approach of another. b : predecessor. 2 : a substance, cell, or cellular component from which another substance, cell, or cellular component is formed.
What is precursor and examples?
Precursor is defined as something that led to the creation of something similar but new. An example of precursor is how radio came before but helped create television. noun. 3. One that precedes and indicates, suggests, or announces someone or something to come.
What is a precursor in genetics?
From Wikipedia, the free encyclopedia. A protein precursor, also called a pro-protein or pro-peptide, is an inactive protein (or peptide) that can be turned into an active form by post-translational modification, such as breaking off a piece of the molecule or adding on another molecule.
What means precursor?
What is a synonym for substrate?
What is another word for the substrate? Substratum or underlayer is used as the synonym for “substrate”. (2) In biochemistry, substrate refers to any substance that is acted upon by an enzyme. Synonyms: substratum; underlayer.
What does the precursor mean?
What are examples of precursors?
The definition of a precursor is something or someone that came before. An example of a precursor is the dark clouds before a storm. Precursor is defined as something that led to the creation of something similar but new. An example of precursor is how radio came before but helped create television.
What does the word precursor mean in chemistry?
Precursor (chemistry) From Wikipedia, the free encyclopedia In chemistry, a precursor is a compound that participates in a chemical reaction that produces another compound. In biochemistry, the term “precursor” often refers more specifically to a chemical compound preceding another in a metabolic pathway, such as a protein precursor.
Which is a precursor to the biological pigment melanin?
l -Phenylalanine, l -tyrosine, and l -DOPA are all precursors to the biological pigment melanin. The enzyme tyrosinase catalyzes the oxidation of l -DOPA to the reactive intermediate dopaquinone, which reacts further, eventually leading to melanin oligomers.
When was the European law on drug precursors adopted?
In Europe the Regulation (EC) No. 273/2004 of the European Parliament and of the Council on drug precursors was adopted on 11 February 2004. ( European law on drug precursors ) On January 15, 2013, the Regulation (EU) No. 98/2013 of the European Parliament and of the Council on the marketing and use of explosives precursors was adopted.