A Certificate of Analysis (COA) utilizing reverse-phase high-performance liquid chromatography (RP-HPLC) is essential for confirming the chemical identity and purity of MOTS-c in laboratory research settings. PX1 Research provides lot-specific analytical documentation, mass spectrometry sequencing, and endotoxin verification for every batch of research-grade peptides. This guide details how to interpret HPLC chromatograms, evaluate purity metrics, and ensure batch consistency for in vitro and animal models.
A Certificate of Analysis (COA) utilizing reverse-phase high-performance liquid chromatography (RP-HPLC) is essential for confirming the chemical identity and purity of MOTS-c in laboratory research settings. PX1 Research provides lot-specific analytical documentation, mass spectrometry sequencing, and endotoxin verification for every batch of research-grade peptides. This guide details how to interpret HPLC chromatograms, evaluate purity metrics, and ensure batch consistency for in vitro and animal models.
A MOTS-c COA HPLC document provides empirical proof of peptide identity and purity using reverse-phase high-performance liquid chromatography and mass spectrometry. For valid preclinical testing, researchers require a lot-specific Certificate of Analysis demonstrating ≥98% purity, confirming sequence fidelity, and verifying low endotoxin levels (<0.1 EU/mg) before introducing the research compound into cellular or animal research models.
When evaluating a MOTS-c product listing, investigator confidence depends on transparent, third-party analytical testing performed by ISO 17025 accredited laboratories. Understanding chromatogram peak integration, mass-to-charge ratio (m/z) validation, and proper reconstituted peptide handling ensures experimental repeatability across metabolic and mitochondrial research protocols.
MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA Type-C) is a 16-amino acid mitochondrial-derived peptide encoded within the mitochondrial genome. Unlike traditional nuclear-encoded signal peptides, MOTS-c functions as a novel retrograde signaling molecule that translocates to the cell nucleus during metabolic stress. Investigators across biochemistry and cellular physiology study MOTS-c to understand non-canonical mitochondrial signaling networks.
Primary literature emphasizes that MOTS-c target pathways involve nutrient sensing, intracellular energy balance, and systemic homeostasis. To explore how mitochondrial peptides fit into broader metabolic paradigms, laboratories frequently reference our comprehensive research peptides catalog and dedicated mitochondrial research resource hub.
Because MOTS-c consists of a precise 16-amino acid primary sequence (Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg), synthetically produced variants must be strictly verified. Impurities such as truncated sequences, deletions, or residual TFA salts can alter binding kinetics and yield false data in sensitive in vitro assays.
Preclinical studies suggest that MOTS-c acts directly on skeletal muscle and metabolic tissues to influence glucose utilization and fatty acid oxidation. In rodent models, exogenous administration of research-grade MOTS-c has been shown to activate AMP-activated protein kinase (AMPK), a central metabolic master switch, leading to downstream transcription factors involved in energy expenditure.
In vitro assays indicate that under metabolic strain or glucose restriction, MOTS-c translocates to the nucleus where it interacts with ARE (Antioxidant Response Element) sites and partners with transcription factors like Nrf2. This mechanism is central to ongoing investigations into exercise-mimetic effects, insulin sensitivity regulation, and adaptive stress responses.
Further research models evaluate how MOTS-c targets mitochondrial respiration directly by maintaining inner mitochondrial membrane potential and modulating reactive oxygen species (ROS) production. Researchers studying metabolic adaptability utilize MOTS-c mitochondrial research protocols to isolate the cellular pathways that mediate enhanced physical performance and resistance to metabolic challenge.
A comprehensive Certificate of Analysis (COA) for MOTS-c serves as the primary standard of quality control for research institutions. The document must explicitly state the peptide name, molecular formula (C101H152N28O22S2), theoretical molecular weight (2174.6 g/mol), lot number, date of manufacture, and storage conditions.
A compliant COA contains three mandatory analytical sections: identity confirmation via mass spectrometry, purity determination via RP-HPLC, and safety/contaminant screening including endotoxin quantification and appearance testing. Without lot-specific verification, investigators risk introducing confounding variables into cell cultures or animal studies.
At PX1 Research, every batch undergoes independent testing at accredited analytical facilities. Investigators seeking transparent data can examine sample documentation or inquire about custom batch requirements through our wholesale peptide portal.
Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) is the gold standard method for quantifying chemical purity in synthetic peptides. The technique separates the target MOTS-c molecule from synthesis side-products, stereoisomers, and truncated fragments based on hydrophobic interactions with C18 stationary phases.
The resulting HPLC chromatogram displays intensity (mAU) versus retention time (minutes). Purity is determined by integrating the main target peak relative to total peak area. High-grade research material exhibits a singular, sharp peak with minimal baseline drift, corresponding to a purity calculation of ≥98.0%.
Below is a standard representation of parameters reported during RP-HPLC analysis of research-grade MOTS-c:
While RP-HPLC establishes chemical purity percentage, Mass Spectrometry (MS)—typically Matrix-Assisted Laser Desorption/Ionization (MALDI-TOF) or Electrospray Ionization (ESI-MS)—is required to confirm molecular weight and sequence identity. The observed mass-to-charge ratio (m/z) must match the theoretical molecular weight of MOTS-c (2174.6 Da) within precise error tolerances.
Equally critical for biological evaluation is bacterial endotoxin testing, quantified via Limulus Amebocyte Lysate (LAL) assays. Bacterial lipopolysaccharides (LPS) induce acute inflammatory responses in cell culture models and rodent studies, masking true experimental results. Quality-focused suppliers maintain endotoxin thresholds under 0.1 EU/mg.
All PX1 Research compounds are manufactured in USA-based, GMP-compliant facilities and pass strict ISO 17025 lab verification prior to release, guaranteeing that researchers receive sterile, endotoxin-screened material suitable for stringent in vitro and animal models.
In mitochondrial research, scientists frequently compare MOTS-c against other prominent mitochondrial-targeted peptides to evaluate distinct signaling cascades and structural characteristics.
While MOTS-c acts as a nuclear-translocating metabolic regulator involved in glucose homeostasis and exercise response, SS-31 (Elamipretide) targets the inner mitochondrial membrane directly by binding to cardiolipin to attenuate electron transport chain electron leakage. Similarly, Humanin represents another well-studied mitochondrial-derived peptide primarily evaluated for cytoprotective and anti-apoptotic signaling pathways.
Comparing these compounds highlights the diverse mechanisms within mitochondrial biology: MOTS-c provides unique utility for metabolic and transcription factor modulation, whereas SS-31 and Humanin focus on membrane stabilization and cell survival pathways respectively.
Lyophilized MOTS-c peptide should be stored at -20°C or -80°C upon receipt to maintain long-term stability. Desiccation is recommended to prevent moisture absorption prior to reconstitution. For laboratory handling, research personnel should allow the vial to reach room temperature before opening to avoid condensation.
Reconstitution should be conducted using sterile Bacteriostatic Water or sterile phosphate-buffered saline (PBS, pH 7.4), depending on the requirements of the downstream assay. Gentle swirling or inversion is recommended; vigorous vortexing should be avoided as mechanical shear forces can denature delicate peptide bonds.
Once reconstituted, working aliquots should be frozen at -80°C to minimize freeze-thaw cycles. Detailed reconstitution matrices and solubility guidelines across our peptide catalog are available in the PX1 Research knowledge base.
In modern bio-analytical research, supplier selection directly impacts data reproducibility. Unregulated or offshore suppliers frequently omit lot-specific COAs or rely on outdated, non-verifiable static lab reports that do not reflect actual batch contents.
PX1 Research enforces strict quality standards: every batch is USA-manufactured, lot-traced, and accompanied by live third-party HPLC/MS chromatograms. With same-day shipping originating from our California and Arizona distribution hubs, laboratories receive freshly tested compounds with complete chain-of-custody documentation.
Research teams seeking reliable supply chains for mitochondrial investigation can explore our complete peptides catalog or request bulk quote options for institutional programs.
What does an HPLC purity percentage indicate on a MOTS-c COA?
The HPLC purity percentage indicates the relative area of the main MOTS-c peptide peak compared to all detected peaks on the chromatogram at 214 nm. A result of ≥98% confirms that impurities, truncated peptide fragments, and residual synthesis side-products constitute less than 2% of the total peptide content.
Why is Mass Spectrometry needed alongside HPLC testing?
HPLC measures chemical purity based on separation retention time, but it cannot definitively confirm molecular weight or identity. Mass Spectrometry (MS) measures the precise mass-to-charge ratio (m/z) of the molecule, verifying that the compound possesses the correct sequence weight of 2174.6 Da.
What endotoxin levels are acceptable for MOTS-c in animal research?
For reliable in vitro and preclinical animal research, endotoxin levels should ideally measure below 0.1 EU/mg (or < 0.05 EU/mL upon reconstitution). Low endotoxin levels prevent non-specific inflammatory signaling or cytokine release in biological systems.
How should lyophilized MOTS-c be stored long-term?
Lyophilized MOTS-c powder should be stored tightly sealed at -20°C or -80°C away from light and humidity. Under proper freezing conditions, the dry peptide remains stable for 24 to 36 months.
What solvent is recommended for reconstituting MOTS-c for in vitro assays?
Sterile Bacteriostatic Water or sterile PBS (pH 7.4) is standard for reconstituting MOTS-c. If solubility issues arise at high concentrations, a minimal amount of sterile dilute acetic acid (0.1%) or DMSO can be utilized prior to buffer dilution.
Is MOTS-c suitable for human administration or clinical use?
No. MOTS-c supplied by PX1 Research is strictly a research compound intended exclusively for laboratory, in vitro, and preclinical animal research use. It is not for medical, human, or therapeutic application.
How does PX1 Research ensure lot-to-lot consistency for MOTS-c?
PX1 Research utilizes USA-based ISO 17025 accredited analytical laboratories to run HPLC, mass spectrometry, and endotoxin assays on every production batch. Each order links directly to a unique, lot-specific COA.
How does MOTS-c compare in molecular weight to SS-31 and Humanin?
MOTS-c has a molecular weight of approximately 2174.6 Da (16 amino acids). SS-31 is significantly smaller at 639.8 Da (4 amino acids), while Humanin is larger at approximately 2687.2 Da (24 amino acids).
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.