A short chain of amino acids (typically 2–50) linked by peptide bonds. Peptides are studied extensively in biochemistry for their roles in cellular signaling and receptor binding.

Latin for "in glass." Refers to experiments conducted in controlled laboratory environments outside of living organisms, such as in test tubes or cell cultures.

Experiments performed inside living organisms. In-vivo results may differ significantly from in-vitro findings and are required for understanding whole-organism effects.

The time required for half of a compound's concentration to be eliminated from a system. In research contexts, this describes compound stability in a given medium.

A protein molecule that receives and responds to chemical signals. Peptide research often involves studying how compounds bind to specific receptor subtypes.

A compound that binds to a receptor and activates it, producing a biological response. Research agonists are used to study receptor function in cell models.

Freeze-dried. A preservation process that removes water from compounds under low pressure, producing a stable powder form suitable for long-term storage.

The proportion of a compound that reaches its site of action. In research, this refers to how well a compound is absorbed and distributed in experimental models.

The process by which new blood vessels form from existing ones. Studied in cell biology research using various compounds to understand vascular biology.

High-Performance Liquid Chromatography. An analytical technique used to measure compound purity and identify contaminants in research samples.

Research conducted before human clinical trials, typically involving cell cultures and animal models. Preclinical results do not guarantee safety or efficacy in humans.

An analytical technique that measures the mass-to-charge ratio of ions. Used alongside HPLC to confirm compound identity and purity in quality control.