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Some research is devoted to finding combinations of extant antibiotics which when combined exhibit synergy. A classic example of this effect is the interaction between β-lactams, which damage the bacteria cell membrane, and aminoglycosides, which inhibit protein synthesis. [1]
Untransformed human cells exhibit normal cellular behavior and mediate their growth and proliferation via interplay between environmental nutrients, growth factor signaling, and cell density. As cell density increases and the culture becomes confluent, they initiate cell cycle arrest and downregulate proliferation and mitogen signaling pathways ...
Most competitive inhibitors function by binding reversibly to the active site of the enzyme. [1] As a result, many sources state that this is the defining feature of competitive inhibitors. [ 7 ] This, however, is a misleading oversimplification , as there are many possible mechanisms by which an enzyme may bind either the inhibitor or the ...
Reversible inhibitors produce different types of inhibition depending on whether they bind to the enzyme, the enzyme-substrate complex, or both. Enzyme inhibitors play an important role in all cells, since they are generally specific to one enzyme each and serve to control that enzyme's activity.
Allosteric regulation of an enzyme. In the fields of biochemistry and pharmacology an allosteric regulator (or allosteric modulator) is a substance that binds to a site on an enzyme or receptor distinct from the active site, resulting in a conformational change that alters the protein's activity, either enhancing or inhibiting its function.
External inhibition is the observed decrease of the response of a conditioned reaction when an external (distracting) stimulus that was not part of the original conditioned response set is introduced.
Solomon Washington scored 17 points and No. 8 Texas A&M used a huge second half run to cruise to a 69-53 win over Georgia on Tuesday night. Georgia led by eight points early in the second half ...
Constitutively active receptors that exhibit intrinsic or basal activity can have inverse agonists, which not only block the effects of binding agonists like a classical antagonist but also inhibit the basal activity of the receptor. Many drugs previously classified as antagonists are now beginning to be reclassified as inverse agonists because ...