All products are for research use only. Not for human consumption.
A plain-language reference for the terms you'll encounter across Novatide — from HPLC and CoA to half-life, bioavailability, and lot traceability. Every term is defined with the research context in mind.
The building block molecules that link together to form peptides and proteins.
Amino acids are organic compounds containing an amino group, a carboxyl group, and a side chain that defines each amino acid's identity. There are 20 standard amino acids that link together via peptide bonds to form peptides and proteins. The sequence of amino acids in a peptide determines its three-dimensional structure and biological function.
A modified version of a natural peptide, engineered to alter stability, half-life, or receptor binding.
A peptide analog is a synthetic compound with a structure similar to a naturally occurring peptide but with deliberate modifications — usually to improve half-life, receptor selectivity, or metabolic stability. Examples include CJC-1295 (a GHRH analog) and Semaglutide (a GLP-1 analog). Analogs are central to modern peptide research because they allow researchers to study specific pathways with greater precision.
A protein used in laboratory assays to detect the presence of specific peptides or proteins.
Antibodies are Y-shaped proteins that bind specifically to target molecules. In peptide research, antibodies are commonly used in assays like ELISA and Western blot to quantify peptide concentrations or detect specific compounds in a sample.
A single production run of a peptide, uniquely identified for traceability.
A batch (or lot) is a quantity of peptide synthesized in a single production run, tracked via a unique identifier (e.g., NPT-2026-0015). Every batch at Novatide is independently tested and receives its own Certificate of Analysis, so researchers can trace any vial back to its specific synthesis and quality control data.
USP-grade sterile water containing 0.9% benzyl alcohol used in reconstitution research protocols.
Bacteriostatic water is sterile water for injection preserved with 0.9% benzyl alcohol, which inhibits bacterial growth. In peptide research protocols, it is commonly used as the reconstitution solvent for lyophilized peptides. Novatide does not provide reconstitution instructions — all handling is the responsibility of the qualified researcher.
The proportion of a compound that reaches systemic circulation in a research model.
Bioavailability measures how much of an administered compound actually enters the bloodstream and is available for biological activity in a research model. Oral peptides typically have very low bioavailability due to gastrointestinal degradation, which is why most research peptides are studied using parenteral routes in preclinical models.
A lab-issued document certifying the identity, purity, and quality of a specific peptide batch.
A Certificate of Analysis (CoA) is a document issued by an independent laboratory that certifies the identity, purity, and quality of a specific batch of peptide. It typically includes HPLC purity percentage, mass spectrometry identification, appearance, solubility, and sterility results. At Novatide, every product comes with a CoA — no exceptions.
FDA quality framework for manufacturing consistency and traceability.
cGMP stands for current Good Manufacturing Practice, a quality assurance framework mandated by the FDA that governs how pharmaceutical and research-grade compounds are manufactured. It covers facility design, personnel training, equipment validation, documentation, and batch-level traceability. Novatide sources from cGMP-registered facilities for quality consistency.
A visual output from HPLC showing peaks that represent compounds detected in a sample.
A chromatogram is the graphical output from High-Performance Liquid Chromatography (HPLC). Each peak represents a compound detected in the sample, with the peak height and area proportional to concentration. In peptide research, the main peak represents the target compound, and smaller peaks indicate impurities. Purity percentage is calculated by dividing the main peak area by the total peak area.
Temperature-controlled shipping and handling from manufacturer to lab.
Cold-chain shipping maintains consistent refrigerated or frozen temperatures throughout a peptide's journey from manufacturer to research lab. Lyophilized peptides are generally shipped with ice packs in insulated packaging to preserve integrity during transit, especially for heat-sensitive compounds.
A peptide consisting of exactly two amino acids joined by a single peptide bond.
A dipeptide is the simplest class of peptide, composed of just two amino acids joined by a single peptide bond. Larger peptides contain more amino acids (tripeptides have three, tetrapeptides have four, and so on). Most research peptides contain between 3 and 50 amino acids.
An antibody-based assay used to quantify peptide concentrations.
ELISA (Enzyme-Linked Immunosorbent Assay) is an antibody-based laboratory technique used to detect and quantify specific peptides or proteins in a sample. It is commonly used in peptide research to measure compound concentrations in preclinical models or to validate the identity of a synthesized peptide.
Produced naturally within a biological system, as opposed to introduced externally.
Endogenous refers to substances produced naturally within an organism. Many research peptides are analogs of endogenous compounds — for example, Sermorelin is a synthetic analog of endogenous GHRH. Understanding endogenous baselines is critical for interpreting research results involving exogenous peptide administration.
The hypothalamic peptide that stimulates pituitary GH release.
Growth Hormone Releasing Hormone (GHRH) is a 44-amino-acid peptide produced in the hypothalamus that stimulates the anterior pituitary to release growth hormone. Synthetic GHRH analogs like Sermorelin, CJC-1295, and Tesamorelin are widely studied in growth hormone axis research.
An incretin hormone studied extensively for metabolic and glycemic research.
GLP-1 (Glucagon-Like Peptide-1) is an incretin hormone released by intestinal L-cells in response to food intake. It stimulates insulin secretion, suppresses glucagon release, and delays gastric emptying. GLP-1 receptor agonists like Semaglutide and Tirzepatide are among the most-studied research peptides in modern metabolic science.
The time it takes for a compound's concentration in a system to reduce by half.
Half-life is the time required for the concentration of a compound in a research model to decrease by 50%. Peptide half-lives vary enormously — from minutes (native GLP-1) to days (Semaglutide) to weeks (CJC-1295 with DAC). Understanding half-life is critical for designing research protocols and interpreting dose-response data.
The gold-standard analytical technique for measuring peptide purity.
High-Performance Liquid Chromatography (HPLC) is the gold-standard analytical technique for measuring peptide purity and identity. It separates compounds in a sample based on their interaction with a stationary phase, producing a chromatogram where each peak represents a distinct compound. Purity is calculated from peak area ratios. Novatide peptides are verified at 99%+ HPLC purity.
A class of gut-derived hormones that stimulate insulin release after food intake.
Incretins are a class of gastrointestinal hormones — primarily GLP-1 and GIP — that stimulate insulin secretion from pancreatic beta cells in response to food intake. Incretin-based peptides are a major class of research compounds in metabolic science, including Semaglutide, Tirzepatide (dual incretin), and Retatrutide (triple agonist).
Freeze-dried into a stable powder for long-term storage.
Lyophilization, or freeze-drying, is a preservation method that removes water from a peptide under vacuum at very low temperatures. The result is a stable powder that can be stored refrigerated or frozen for extended periods without degradation. Virtually all Novatide peptides are supplied as lyophilized powders for maximum shelf life.
A unique identifier linking a vial to its batch production record and CoA.
A lot number (or batch number) is a unique identifier assigned to every production run of a peptide. It enables full traceability — researchers can verify a specific vial's CoA, synthesis date, test results, and expiry by referencing its lot number. Novatide lot numbers follow the format NPT-YEAR-XXXX.
An analytical technique that confirms a peptide's molecular identity by mass.
Mass spectrometry (MS) is an analytical technique that ionizes molecules and measures their mass-to-charge ratio, confirming molecular identity. In peptide research, MS is paired with HPLC to verify both purity (HPLC) and identity (MS). A peptide can only be certified if both tests confirm it is the correct molecule at the correct purity.
The sum of atomic weights of all atoms in a peptide, expressed in Daltons.
Molecular weight (MW) is the total weight of all atoms in a peptide molecule, expressed in Daltons (Da). It is determined by the amino acid sequence and any post-translational modifications. MW is an essential identity parameter reported on every Certificate of Analysis.
The covalent bond linking two amino acids to form a peptide.
A peptide bond is a covalent bond formed when the carboxyl group of one amino acid reacts with the amino group of another, releasing a water molecule. Chains of peptide bonds form the peptide backbone. The term 'peptide' comes from this fundamental bond.
The study of how a compound is absorbed, distributed, metabolized, and excreted.
Pharmacokinetics (PK) describes what a research model does to a compound — absorption, distribution, metabolism, and excretion (ADME). PK data includes parameters like half-life, Cmax, Tmax, and area under the curve (AUC). It is essential for designing research protocols and interpreting dose-response relationships.
The linear sequence of amino acids in a peptide.
The primary structure of a peptide is the linear sequence of amino acids joined by peptide bonds, written from N-terminus to C-terminus using three-letter codes (e.g., Gly-Glu-Pro...). Primary structure determines all higher-order folding and biological activity.
The percentage of target peptide in a sample, with the remainder being impurities.
Purity is the percentage of the target peptide in a sample, typically measured by HPLC. A 99% pure peptide means 99% of the detectable material is the intended compound, with 1% consisting of impurities — usually truncated sequences, deletion products, or oxidized forms. Higher purity reduces confounding variables in research.
A compound that binds a receptor and activates its downstream signaling.
A receptor agonist is a molecule that binds to a specific cellular receptor and triggers its downstream biological response — mimicking the natural ligand. Many research peptides are agonists of specific receptors, like GLP-1 receptor agonists (Semaglutide) or melanocortin receptor agonists (PT-141).
A classification indicating a compound is supplied strictly for laboratory research.
Research Use Only (RUO) is a regulatory designation indicating that a compound is supplied strictly for laboratory research and is not intended for human or animal consumption, diagnostic use, therapeutic use, or clinical use. All Novatide products are classified RUO under 21 CFR 809.10(c).
The ordered list of amino acids in a peptide, from N-terminus to C-terminus.
A peptide sequence is the ordered list of amino acids that make up the peptide, written from the N-terminus (amino end) to the C-terminus (carboxyl end). Sequences are typically written in three-letter codes (e.g., Thr-Lys-Pro-Arg-Pro-Gly-Pro for Selank) or single-letter codes. Sequence is the defining identity of any peptide.
The standard modern method of synthesizing peptides on a solid resin support.
Solid-Phase Peptide Synthesis (SPPS) is the standard modern method of chemically synthesizing peptides. Developed by Bruce Merrifield (Nobel Prize, 1984), it builds peptides one amino acid at a time on a solid resin support, allowing for precise control and efficient purification. Most commercial research peptides are produced via SPPS.
The absence of viable microorganisms in a research sample.
Sterility means the complete absence of viable microorganisms. For research peptides, sterility is verified through sterile filtration and microbial testing. Every Novatide batch is tested for sterility alongside HPLC and mass spectrometry, with results reported on the CoA.
The ability to track a specific vial back to its batch, tests, and manufacturing origin.
Traceability is the ability to track any individual vial back to its complete manufacturing and quality-control history — synthesis date, CoA, lab results, raw materials, and facility. Novatide offers full batch traceability via our /verify tool, where any batch number can be entered to retrieve its full record.
Every term you just read is put into practice on every Novatide product page. Start with our most-researched compounds.