Search results
Results from the WOW.Com Content Network
In biochemistry, denaturation is a process in which proteins or nucleic acids lose folded structure present in their native state due to various factors, including application of some external stress or compound, such as a strong acid or base, a concentrated inorganic salt, an organic solvent (e.g., alcohol or chloroform), agitation and radiation, or heat. [3]
Glucansucrase (also known as glucosyltransferase) is an enzyme in the glycoside hydrolase family GH70 used by lactic acid bacteria to split sucrose; it then utilizes the resulting glucose molecules to build long, sticky biofilm chains. These extracellular homopolysaccharides are called α-glucan polymers.
At this temperature, bacteria are killed, enzymes in the milk are destroyed, and many of the proteins are denatured. [2] Since most milk sold today is pasteurized , which accomplishes the first two goals, milk is typically scalded to increase its temperature, or to change the consistency or other cooking interactions by the denaturing of proteins.
Botulinum toxin, or botulinum neurotoxin (commonly called botox), is a neurotoxic protein produced by the bacterium Clostridium botulinum and related species. [24] It prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction, thus causing flaccid paralysis. [25]
Capsaicin acts as an antifungal agent in four primary ways. First, capsaicin inhibits the metabolic rate of the cells that make up the fungal biofilm. [81] This inhibits the area and growth rate of the fungus, since the biofilm creates an area where a fungus can grow and adhere to the chili in which capsaicin is present. [82]
Skin flora is usually non-pathogenic, and either commensal (are not harmful to their host) or mutualistic (offer a benefit). The benefits bacteria can offer include preventing transient pathogenic organisms from colonizing the skin surface, either by competing for nutrients, secreting chemicals against them, or stimulating the skin's immune ...
T. aquaticus is a bacterium that lives in hot springs and hydrothermal vents, and Taq polymerase was identified [1] as an enzyme able to withstand the protein-denaturing conditions (high temperature) required during PCR. [2] Therefore, it replaced the DNA polymerase from E. coli originally used in PCR. [3]
As a result of Phillips' elucidation of the structure of lysozyme, it was also the first enzyme to have a detailed, specific mechanism suggested for its method of catalytic action. [61] [62] [63] This work led Phillips to provide an explanation for how enzymes speed up a chemical reaction in terms of its physical structures. The original ...