Research Peptide Glossary (A–Z)

Velox Peptides Research Team · Plain-English reference

For research reference only. These are general plain-English definitions of terms you will meet in peptide science. All Velox Peptides compounds are supplied for in vitro research use only — never for human or veterinary use, injection, diagnosis, treatment, or prevention of any condition.

Reading about research peptides can throw a lot of science words at you fast. This glossary explains the most common terms in plain English — clear enough for a 15-year-old to follow. Definitions are general scientific explanations, not advice or instructions for using any compound. Remember: everything Velox supplies is a research reagent for lab use only.

A

Agonist: A molecule that switches a receptor “on”, making a cell respond in the same way the body’s own signal would. The opposite is an antagonist, which blocks the receptor instead.
Amino acid: A small building-block molecule. Chains of amino acids linked together make peptides and proteins, a bit like beads on a string.
Analogue: A molecule designed to be very similar to another one, with small changes made on purpose to alter how it behaves — for example, to make it last longer.
Angiogenesis: The growing of new blood vessels. It is a common focus in tissue-repair research because new vessels carry blood to areas that are healing.
Aqueous: Means “water-based”. An aqueous solution is something dissolved in water.

B

Bacteriostatic water: Sterile water with a small amount of preservative that stops bacteria from growing. In the lab it is commonly used to reconstitute (re-dissolve) freeze-dried peptides.
Batch: A single production run of a compound. Each batch is tested separately and gets its own paperwork, so its purity can be traced.
BDNF: Short for Brain-Derived Neurotrophic Factor, a protein that helps nerve cells grow and stay healthy. Researchers often measure it in brain and mood studies.
Bioavailability: How much of a substance actually reaches the place it needs to be, in a form that still works. Low bioavailability means a lot is lost or broken down first.

C

Certificate of Analysis (CoA): A document that lists a batch’s test results — such as how pure it is and confirmation that it really is the compound on the label.

D

Desiccant: A drying agent (like the little “do not eat” sachets in packaging) that soaks up moisture to keep a product dry and stable.
DSIP: Short for Delta Sleep-Inducing Peptide, a neuropeptide studied in animal models for how it relates to sleep patterns.

E

Endogenous: Made naturally inside the body, rather than added from outside. For example, your body makes some hormones endogenously.

G

GHRH: Short for Growth Hormone-Releasing Hormone — the body’s natural signal that tells the brain to release growth hormone.
GIP: Short for Glucose-dependent Insulinotropic Polypeptide, a gut hormone studied in research about blood sugar and metabolism.
GLP-1: Short for Glucagon-Like Peptide-1, a gut hormone studied in metabolic and blood-sugar research.
Glucagon: A hormone that raises blood sugar. It works as a counterbalance to insulin, which lowers blood sugar.

H

Half-life: The time it takes for half of a substance to break down or leave a system. A longer half-life means it sticks around longer.
HPLC (High-Performance Liquid Chromatography): A lab method that pushes a sample through a column to separate its parts. It is used to measure how pure a peptide is — the higher the purity figure, the cleaner the sample.

I

In vitro: Research done outside a living body — in a test tube, dish, or other lab setup. The Latin means “in glass”. All Velox products are for in vitro use only.
In vivo: Research done inside a living organism, such as an animal study. The Latin means “in the living thing”.

L

Lyophilised (freeze-dried): Dried by freezing the material and then removing the water, leaving a stable powder that keeps far longer than a liquid would.

M

Mass spectrometry: A lab method that weighs molecules very precisely. It is used alongside HPLC to confirm that a sample really is the compound it claims to be.
Molecular weight: How heavy a single molecule is. Scientists use it to identify a compound and to work out concentrations when mixing solutions.

N

Neuropeptide: A peptide that acts as a messenger in the brain and nervous system, helping nerve cells send signals to each other.
Nootropic: A general term for a substance studied for possible effects on learning or memory in research models. It does not imply any proven benefit in people.

P

Peptide: A short chain of amino acids — basically a very small protein. Peptides carry out many signalling jobs in living things.
Pentadecapeptide: A peptide made of exactly 15 amino acids. (“Penta” is five and “deca” is ten.)
Pharmacokinetics: The study of how a substance moves through a system over time — how it is taken up, spreads, and is broken down or removed.
Preclinical: Early-stage research carried out in cells or animals, before any testing in humans. Preclinical findings are not proof of effects in people.
Purity: How much of a sample is the intended compound, usually given as a percentage. The rest is made up of small impurities.

R

Receptor: A “docking point” on a cell. When the right molecule attaches to it, the cell responds — a bit like a key fitting a lock.
Reconstitution: Mixing a freeze-dried powder back into a liquid (often bacteriostatic water) so it can be measured and used in research.
Research reagent: A substance sold strictly for laboratory research. It is not a medicine and is not for use in people or animals.

S

Secretagogue: A substance that prompts the body to release something, such as a hormone. For example, some compounds are studied as growth-hormone secretagogues.
Sequence (amino-acid sequence): The exact order of amino acids in a peptide. The sequence is what makes one peptide different from another.
Subcutaneous: A general scientific word for the layer of tissue just under the skin. This is only a definition: Velox products are for in vitro research only and are never for injection or human or animal use.
Synthetic peptide: A peptide made in a lab rather than taken from a living thing. Most research peptides are synthetic, which helps keep them consistent and pure.

T

Tripeptide: A peptide made of just three amino acids. (“Tri” means three.)

V

Vial: The small glass container a peptide is supplied and stored in, usually sealed to keep the contents clean and dry.

Want to go deeper? Browse our guides for plain-English explainers and comparisons, or see the full compound catalogue. Every compound is supplied for in vitro research use only.