What is it: A Process Control Plan (PCP) is a summary of defect prevention and reactive detection techniques. The overall intent of the PCP is to control the product characteristics and the associated process variables to ensure capability (around the identified target or nominal) and stability of the product over time.
Various compounds can reduce the activity of enzymes. They may act in a variety of different ways, and indeed may be reversible or irreversible inhibitors of the enzyme. An irreversible inhibitor causes covalent modification of the enzyme, so that its activity is permanently reduced.
a molecule that prevents an enzyme from catalysing a reaction. Such inhibitors can compete with the normal substrate (see COMPETITIVE INHIBITION or can block the active site, preventing entry of the substrate (see NONCOMPETITIVE INHIBITION). Inhibition may be reversible or irreversible. Enzyme inhibitors often form part of a FEEDBACK MECHANISM to regulate a biochemical pathway.