part_of part of has_part has part molecular_function protein binding regulation of molecular function molecular function regulator molecular function regulator activity A molecular function regulator regulates the activity of its target via non-covalent binding that does not result in covalent modification to the target. Examples of molecular function regulators include regulatory subunits of multimeric enzymes and channels. Mechanisms of regulation include allosteric changes in the target and competitive inhibition. A molecular function that modulates the activity of a gene product or complex. Examples include enzyme regulators and channel regulators. molecular function regulator