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Positive Feedback definitions

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  • Positive Feedback
    A regulatory mechanism where a final product enhances earlier steps, accelerating its own production and maintaining high concentrations.
  • Metabolic Pathway
    A series of enzyme-catalyzed reactions within a cell, leading to the formation of a specific final product.
  • Final Product
    The end molecule produced by a metabolic pathway, often involved in feedback regulation of the pathway.
  • Allosteric Enzyme
    A protein capable of binding regulatory molecules at sites other than its active site, altering its activity.
  • Activator
    A molecule that binds to an enzyme, increasing its catalytic activity and promoting pathway progression.
  • Inhibitor
    A molecule that binds to an enzyme, decreasing its activity and slowing or halting pathway progression.
  • Allosteric Kinetics
    A pattern of enzyme activity influenced by binding of effectors at regulatory sites, distinct from classic Michaelis-Menten behavior.
  • Michaelis-Menten Kinetics
    A model describing enzyme activity where reaction rate depends on substrate concentration in a predictable manner.
  • Metabolic Communication
    Interaction between different metabolic pathways via regulatory molecules, ensuring efficient production of cellular products.
  • Allosteric Effector
    A molecule that modulates enzyme activity by binding to a regulatory site, either activating or inhibiting the enzyme.
  • Negative Feedback
    A regulatory mechanism where a final product suppresses earlier steps, preventing overproduction and maintaining balance.
  • Reaction Rate
    The speed at which a substrate is converted to product by an enzyme, influenced by regulatory molecules.
  • Concentration
    The amount of a specific molecule present in a cell, often dictating regulatory responses in metabolic pathways.
  • Cell Survival
    The maintenance of essential conditions and molecules within a cell, often supported by feedback regulation.
  • Allosteric Site
    A region on an enzyme distinct from the active site, where regulatory molecules bind to modulate enzyme function.