BioScience Dictionary

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found Inhibition 13 times.

Displaying results 1 to 10.

1. Anti-metabolite
An analog of the end-product of a metabolic pathway that causes feedback inhibition or repression , but cannot replace the genuine product; used for selecting feedback-deficient mutant s.

2. Calcitonin
Calcitonin is a hormone secreted by a type of cells in the thyroid gland. (Calcitonin is different from the thyroid hormone thyroxine ). Calcitonin is a small peptide of 32 amino acids. It functions to lower the circulating calcium and phosphate levels. Its secretion is controlled via feedback inhibition by calcium levels.

3. Competitive inhibition
The prevention of an enzyme from binding to its intended substrate as a result of the presence of another molecule which can also attach to the enzyme's active site. The other molecule competes with the substrate for the active site, and the more of the other molecule there is, the slower the enzyme is at carrying out its intended purpose. This type of enzyme inhibition is reversible by increasing the amount of the enzyme's intended substrate. Compare noncompetitive inhibition .* The term can also be generalized to apply to any other set of molecules which compete with and inhibit one another for the same site.

4. Contact inhibition
* The inhibition of continued growth and division of a cell or colony due to physical contact with other cells or colonies. The stopping of continued growth when a certain density of cells has been reached. * The momentary stopping of all movement when a mobile cell runs into another cell.

5. Cytostatic
* Refers to the inhibition of cell growth or cell division, possibly by a drug or other chemical substance. * An area or process in the body where there is less movement and blood cell accumulation than normal.

6. Feedback inhibition (end product inhibition)
The process of the end product of a particular metabolic reaction inhibiting an allosteric enzyme involved in that reaction as the reaction starts again, thus breaking the reaction cycle.

7. Focus-forming assay
A lab technique used to find out if a particular piece of DNA contains oncogene s ( gene s which are associated with cancer ). This is done by putting the DNA into animal cell s which normally show contact inhibition , or which stop growing when they come into physical contact with other cells or reach a certain density in the culture . If the cells lose contact inhibition and form areas of densely-packed cells (called foci) after receiving the DNA, it means that the DNA did contain oncogenes.

8. Hemagglutination-inhibition test (hemagglutination inhibition assay, HI test, HAI test)
A clinical lab test used to detect the presence of a certain hemagglutinating virus or other hemagglutinin antigen based on whether the red blood cell s in the sample lose the ability to clump together when the antibody to the virus or other antigen is added to it. If the virus or antigen is present, the antibody kills it and thereby stops it from being able to stick the red blood cells to each other.

9. Inhibition
Prevention of growth or function.

10. Inhibitor
A molecule which represses or prevents another molecule from engaging in a reaction. See also inhibition .


View web definitions »

Learn more about Inhibition »