Reference
Peptide Research Glossary
63 scientific terms related to peptide chemistry, analytical testing, handling, biological mechanisms, and regulatory classification.
A
8 termsAcetylationThe addition of an acetyl group (CH3CO-) to the N-terminus of a peptide, commonly used to increase metabolic stability.AliquotingDividing a reconstituted peptide solution into smaller portions for individual use, minimizing freeze-thaw cycles on the bulk solution.AmidationThe conversion of a peptide's C-terminal carboxyl group to an amide group (-CONH2), often increasing stability and receptor binding.Amino AcidOrganic molecules containing both an amino group (-NH2) and a carboxyl group (-COOH) that serve as the building blocks of peptides and proteins.Amino Acid AnalysisAn analytical technique that hydrolyzes a peptide and quantifies individual amino acid residues, confirming sequence composition.Amino Acid SequenceThe linear order of amino acid residues in a peptide or protein chain, written from N-terminus to C-terminus, which determines the molecule's identity and properties.AngiogenesisThe formation of new blood vessels from pre-existing vasculature, a process studied in tissue repair and regeneration research.AntioxidantA molecule that inhibits oxidation of other molecules by neutralizing reactive oxygen species (ROS) and free radicals.
B
3 termsBacteriostatic WaterSterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative, commonly used for reconstituting peptides.Bioactive PeptideA peptide that exerts a measurable effect on biological systems, as demonstrated in published research models.BioavailabilityThe fraction of an administered compound that reaches systemic circulation in an active form, influenced by route of administration and molecular properties.
C
6 termsC-TerminusThe end of a peptide chain with a free carboxyl group (-COOH), conventionally written as the last residue in a sequence.Certificate of Analysis (COA)A document issued by an analytical laboratory reporting the results of identity, purity, and safety testing performed on a specific batch of material.ChromatogramA graphical output from HPLC analysis showing UV absorbance vs retention time, where peaks represent different molecular species in the sample.Cold Chain ShippingA temperature-controlled logistics process that maintains peptides within a defined temperature range during transit.Copper PeptideA peptide complexed with a copper(II) ion, with GHK-Cu being the most studied example in published research.CyclizationThe formation of a ring structure within a peptide, typically through side-chain-to-side-chain, head-to-tail, or disulfide linkages, often increasing metabolic stability.
D
2 termsDesiccantA moisture-absorbing material (typically silica gel) included with peptide vials to prevent hydration of lyophilized powder during storage.Disulfide BridgeA covalent bond formed between the sulfur atoms of two cysteine residues, creating structural cross-links that stabilize peptide conformation.
E
2 termsF
2 termsFDA (Food and Drug Administration)The United States federal agency responsible for regulating food, drugs, medical devices, and biological products.Freeze-Thaw CycleA single event of freezing a peptide solution and then thawing it, which can cause cumulative degradation through ice crystal formation and aggregation.
G
5 termsGHRHGrowth Hormone-Releasing Hormone — a hypothalamic peptide that stimulates GH secretion via the GHRH receptor on pituitary cells.GIP ReceptorA G-protein coupled receptor for glucose-dependent insulinotropic polypeptide, targeted by dual and triple incretin agonists.GLP-1 ReceptorA class B G-protein coupled receptor activated by glucagon-like peptide-1 and its analogs, central to incretin signaling research.GMP (Good Manufacturing Practice)A system of manufacturing standards ensuring products are consistently produced and controlled to quality specifications required for their intended use.Growth Hormone SecretagogueA compound that stimulates growth hormone release by activating the ghrelin receptor (GHS-R1a) on pituitary somatotrophs.
H
2 termsHalf-LifeThe time required for the concentration of a compound to decrease by 50%, a key pharmacokinetic parameter in peptide research.HPLCHigh-Performance Liquid Chromatography — the standard analytical technique for determining peptide purity by separating molecular species based on their chemical properties.
I
5 termsImmunomodulationThe modification of immune system activity by a compound, studied in research models examining inflammatory and immune pathways.In VitroResearch conducted outside a living organism, typically in test tubes, cell cultures, or other controlled laboratory environments.In VivoResearch conducted within a living organism, such as animal models, to study biological processes in their natural context.Incretin EffectThe enhanced insulin secretion observed when glucose is delivered orally versus intravenously, mediated by GLP-1 and GIP hormones.IRB (Institutional Review Board)An ethics committee that reviews and monitors research involving human subjects to ensure participant rights and safety.
L
2 termsM
4 termsMass SpectrometryAn analytical technique that measures molecular weight by ionizing molecules and separating them by mass-to-charge ratio, used to confirm peptide identity.Melanocortin ReceptorA family of five G-protein coupled receptors (MC1R-MC5R) involved in pigmentation, energy homeostasis, and immune regulation.Mitochondrial-Derived PeptideA peptide encoded by the mitochondrial genome, distinct from nuclear-encoded peptides, with unique signaling properties.Molecular WeightThe sum of atomic weights of all atoms in a molecule, expressed in Daltons (Da). Used to identify peptides via mass spectrometry.
N
5 termsN-TerminusThe end of a peptide chain with a free amino group (-NH2), conventionally written as the first residue in a sequence.NAD+ (Nicotinamide Adenine Dinucleotide)An essential coenzyme found in all living cells, functioning as an electron carrier in metabolic reactions and a cofactor for sirtuin and PARP enzymes.Net Peptide ContentThe percentage of gross powder weight that is actual peptide, accounting for water, counter-ions, and residual solvents.NeuropeptideA peptide that acts as a signaling molecule in the nervous system, influencing neural communication and neuromodulation.NootropicA compound studied for its effects on cognitive function, memory, or neural processes in research models.
O
1 termP
5 termsPentadecapeptideA peptide consisting of exactly 15 amino acid residues. BPC-157 is classified as a pentadecapeptide.Peptide BondA covalent chemical bond formed between the carboxyl group of one amino acid and the amino group of another through a condensation reaction, linking amino acids into chains.PolypeptideA chain of amino acids linked by peptide bonds, typically referring to chains longer than ~20 residues but shorter than full proteins.PreclinicalThe stage of research conducted before human clinical trials, encompassing in vitro studies and animal model experiments.Purity PercentageThe proportion of target peptide relative to total detected material in an HPLC analysis, expressed as a percentage of chromatographic peak area.
R
4 termsReceptor AgonistA molecule that binds to and activates a receptor, mimicking the action of the natural ligand to initiate a signaling response.ReconstitutionThe process of dissolving a lyophilized peptide powder in a suitable solvent to prepare a working solution.Research Use Only (RUO)A regulatory classification for products intended exclusively for laboratory research and not approved for diagnostic, therapeutic, or human use.Residual Solvent AnalysisGas chromatography testing that detects and quantifies organic solvents remaining from peptide synthesis and purification.
S
3 termsShelf LifeThe duration a peptide product maintains acceptable quality when stored under specified conditions.Solid-Phase Peptide Synthesis (SPPS)The standard method for manufacturing synthetic peptides, where amino acids are sequentially coupled to a growing chain anchored to an insoluble resin.Subcutaneous InjectionAn administration route delivering a substance into the layer of tissue between the skin and muscle, commonly used in animal research models.
T
3 termsTelomerase ActivationThe induction of telomerase enzyme activity, which adds telomeric repeat sequences to chromosome ends, studied in aging research.TFA SaltTrifluoroacetic acid salt — a counter-ion remaining from HPLC purification that contributes to the non-peptide mass in lyophilized preparations.Third-Party TestingAnalytical testing performed by a laboratory independent of the peptide manufacturer, eliminating conflicts of interest in quality verification.
V
1 termResearch Use Only
FOR RESEARCH USE ONLY. Products sold by Healthy Aminos are intended strictly for in-vitro research and laboratory use. Not for human or animal consumption. Not FDA approved. By purchasing from Healthy Aminos, the buyer acknowledges that these products are not intended to diagnose, treat, cure, or prevent any disease. All products are sold as reference standards and research chemicals only.