Kisspeptin-10 5mg — Vial Spec, Reconstitution Math & COA

Overview of Kisspeptin-10 5mg Vial Specifications & Laboratory Applications

The 5mg Kisspeptin-10 vial format is engineered specifically for research environments requiring repeated dosing regimes or multiple analytical replicates without the continuous disruption of reconstituting fresh vials. Containing 5 milligrams of high-purity, vacuum-sealed lyophilized cake, this unit size is commonly ordered by neuroendocrine laboratories, reproductive biology units, and receptor binding research teams. If a specific trial protocol calls for alternate mass configurations, researchers can explore our complete inventory of all peptides or inspect the primary Kisspeptin-10 product page for baseline unit availability.

As a primary endogenous ligand for the G-protein coupled receptor KISS1R (formerly GPR54), Kisspeptin-10 represents the minimal decapeptide sequence required to retain full biological activity at the receptor site. In laboratory settings, the 5mg mass offers an optimal balance between stock solution volume and stability, preventing repeated freeze-thaw degradation while minimizing residual storage waste during mid-scale preclinical investigations.

Chemical Structure, Sequence, and Molecular Identity of Kisspeptin-10

Kisspeptin-10 is a synthetic 10-amino-acid peptide corresponding to residues 112–121 of the human KiSS-1 gene product. The canonical sequence is Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2, featuring a critical C-terminal carboxamide modification that is essential for receptor affinity and metabolic stability in biological matrices. It possesses a molecular formula of C63H83N17O14 and a exact molecular weight of approximately 1302.45 g/mol.

The hydrophobic C-terminal region governs its binding kinetics to KISS1R, triggering downstream intracellular cascades including phospholipase C activation, intracellular calcium mobilization, and extracellular signal-regulated kinase (ERK) phosphorylation. Understanding the precise molecular weight is foundational when calculating molar concentrations for in vitro binding assays, microperfusion models, or receptor saturation studies.

Preclinical Mechanisms: Upstream Regulation of the HPG Axis

Preclinical studies indicate that Kisspeptin-10 operates as the primary upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis. Expressed predominantly within the arcuate nucleus and anteroventral periventricular nucleus of the hypothalamus, kisspeptin neurons project directly to gonadotropin-releasing hormone (GnRH) neuronal cell bodies and terminals. Upon binding to KISS1R, Kisspeptin-10 stimulates pulsatile secretion of GnRH into the hypophyseal portal circulation.

In animal models, acute or continuous administration of Kisspeptin-10 leads to rapid downstream release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary gland. Researchers utilize this decapeptide to map pubertal development pathways, investigate central feedback mechanisms mediated by sex steroids, and analyze neuroendocrine dysregulation in models of metabolic stress or reproductive disruption. For deeper exploration of neuroendocrine axis protocols, consult our centralized research library hub.

Reconstitution Protocols & Concentration Math for 5mg Lyophilized Vials

Accurate reconstitution of a 5mg Kisspeptin-10 vial requires precise calculation of diluent volume relative to the target working concentration. Before introducing liquid, allow the sealed vial to reach room temperature (20°C to 25°C) to prevent moisture condensation on the lyophilized cake. Standard laboratory diluents include Bacteriostatic Water (0.9% benzyl alcohol) for multi-dose laboratory assays or Sterile Normal Saline (0.9% NaCl) for immediate in vitro use.

The volumetric concentration yields for a 5mg (5,000 mcg) vial across standard diluent volumes are calculated as follows: • 1.0 mL Diluent Yield: 5.0 mg/mL (5,000 mcg/mL or 5 mcg per microliter [µL]) • 2.0 mL Diluent Yield: 2.5 mg/mL (2,500 mcg/mL or 2.5 mcg per µL) • 2.5 mL Diluent Yield: 2.0 mg/mL (2,000 mcg/mL or 2.0 mcg per µL) • 3.0 mL Diluent Yield: 1.67 mg/mL (1,666.7 mcg/mL or ~1.67 mcg per µL) • 5.0 mL Diluent Yield: 1.0 mg/mL (1,000 mcg/mL or 1.0 mcg per µL)

To quickly verify custom dilution ratios or adjust for microgram-level animal dosing models, investigators should utilize our interactive reconstitution calculator tool.

Aliquot Planning and Diluent Selection for Long-Term Handling

Because peptide bonds are susceptible to hydrolysis and enzymatic cleavage once reconstituted in liquid media, establishing a strict aliquot protocol is critical for maintaining assay reproducibility. A single 5mg vial, when reconstituted into a stock solution, should be divided into single-use micro-aliquots using sterile, low-protein-binding polypropylene tubes. This prevents repeated freeze-thaw cycles, which can induce peptide aggregation and loss of functional potency.

For cell culture or electrophysiological experiments where benzyl alcohol is contraindicated due to cellular toxicity, sterile physiological saline or phosphate-buffered saline (PBS, pH 7.4) is recommended. Aliquots stored at -20°C retain physical integrity for several months, while -80°C storage is advised for ultra-long-term research archives. Avoid utilizing frost-free freezers, as temperature fluctuations during automatic defrost cycles accelerate peptide degradation.

Lot-Specific Analytical Verification: HPLC, MS, and Endotoxin Testing

PX1 Research enforces strict quality control standards for all catalog items. Every lot of Kisspeptin-10 undergoes rigorous double-testing in ISO 17025 accredited, third-party analytical laboratories. High-Performance Liquid Chromatography (HPLC) is conducted to verify peptide purity, ensuring a minimum threshold of ≥98.0%. Mass Spectrometry (MS) confirms exact target identity by matching the theoretical molecular mass of 1302.45 Da.

Furthermore, because bacterial lipopolysaccharides can confound neuroendocrine and immunological research outcomes, all PX1 batches undergo Chromogenic LAL Endotoxin Testing to ensure levels fall strictly below standard laboratory thresholds (<0.01 EU/mg). Researchers can review lot-matched analytical documentation directly on our dedicated COA verification page prior to assay integration.

Comparative Analysis: Kisspeptin-10 vs. Related HPG Axis Research Peptides

When designing neuroendocrine pathways studies, investigators often evaluate Kisspeptin-10 alongside other synthetic signaling molecules governing gonadotropin secretion. While Kisspeptin-10 acts at the highest hierarchy of the HPG axis by directly depolarizing GnRH neurons, direct GnRH receptor agonists function downstream at the pituitary level. Understanding these operational differences is essential for selecting the appropriate tool for specific signal transduction assays.

For instance, compounds such as Gonadorelin mimic native GnRH to directly stimulate LH and FSH release from pituitary gonadotropes, bypassing hypothalamic inputs entirely. Conversely, long-acting synthetic analogs like Triptorelin or Leuprolide bind continuously to the GnRH receptor, producing initial LH surges followed by rapid receptor desensitization and down-regulation. Kisspeptin-10 remains unique in preclinical models due to its ability to probe upstream signal integration, sex-steroid feedback loops, and hypothalamic neuronal reactivity.

Assay Requirements: Choosing 5mg vs. Alternative Vial Masses

Selecting the proper vial mass depends heavily on the scope, scale, and duration of the planned laboratory research. A 5mg mass standard is ideal for mid-sized preclinical animal studies (e.g., rodent micro-infusion series over several days) or multi-plate cell culture assays requiring standardized stock solutions across several weeks.

Smaller vial sizes (such as 2mg variants) may be preferable for pilot feasibility trials or single-dose in vitro binding assays where long-term liquid storage is undesirable. Conversely, larger institutional trials or high-throughput screens often require larger mass units or customized bulk orders. Academic and commercial entities planning high-volume studies can establish custom supply schedules through our dedicated wholesale program.

Quality Control & Storage Guidelines for Synthetic Peptides at PX1 Research

All Kisspeptin-10 research compounds supplied by PX1 Research are manufactured in state-of-the-art, GMP-compliant facilities located within the USA. Upon synthesis and purification, the lyophilized peptide powder is vacuum-sealed in glass vials under an inert argon environment to minimize oxidative degradation during transit and storage.

Unopened, lyophilized vials should be stored in a dark, dry environment at -20°C for optimal shelf life up to 24 months. Orders placed with PX1 Research are processed and dispatched with same-day shipping (Monday through Friday) originating directly from our central distribution hubs in California and Arizona, ensuring rapid transit and temperature integrity for research facilities nationwide.