Potency
Potency — The concentration or dose of a compound required to produce a defined biological effect, typically expressed as EC50 or IC50 values.
What Is Potency?
Potency is the amount of peptide required to produce a defined biological effect, quantified by EC50 (for agonists) or IC50 (for inhibitors). A more potent peptide achieves the same effect at a lower concentration. Potency is distinct from efficacy (maximum achievable effect) and from binding affinity (Kd).
Context
- Relative potency: Ratio of EC50 values comparing test peptide to reference standard
- Bioassay: Functional potency measured in cell-based or animal assays
- Release spec: Potency (80-125% of label claim) is a required release specification for peptide GMP products
Frequently Asked Questions
What is Potency?
The concentration or dose of a compound required to produce a defined biological effect, typically expressed as EC50 or IC50 values.
Why is Potency important in peptide research?
Potency is a fundamental concept in pharmacology as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.