Navigating the verification requirements for mitochondrial research peptides demands transparent, lot-specific analytical documentation. A USA-issued MOTS-c Certificate of Analysis (COA) provides critical baseline verification—including high-performance liquid chromatography (HPLC), electrospray ionization mass spectrometry (ESI-MS), and bacterial endotoxin testing—ensuring research integrity across in vitro and preclinical laboratory assays.
Navigating the verification requirements for mitochondrial research peptides demands transparent, lot-specific analytical documentation. A USA-issued MOTS-c Certificate of Analysis (COA) provides critical baseline verification—including high-performance liquid chromatography (HPLC), electrospray ionization mass spectrometry (ESI-MS), and bacterial endotoxin testing—ensuring research integrity across in vitro and preclinical laboratory assays.
A MOTS-c Certificate of Analysis (COA) from a USA manufacturer validates the chemical identity, sequence purity, and safety profile of the 16-amino acid mitochondrial-derived peptide for laboratory research use. A rigorous USA COA documents a minimum purity of 98% confirmed via reverse-phase high-performance liquid chromatography (RP-HPLC), verifies exact molecular mass using electrospray ionization mass spectrometry (ESI-MS), and confirms endotoxin limits under 0.01 EU/mg tested by ISO 17025 accredited laboratories.
For investigators evaluating metabolic and cellular signaling mechanisms, obtaining verifiable, lot-traceable COA documentation is vital. PX1 Research delivers full transparency for every lot of synthesized MOTS-c peptide, providing complete analytical reports produced in ISO 17025 analytical facilities within the United States. Researchers can explore our complete inventory of verified compounds through the all research peptides library.
MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA Type-c) represents a unique class of signaling molecules known as mitochondrial-derived peptides (MDPs). Encoded within the mitochondrial genome rather than the nuclear DNA, MOTS-c consists of a 16-amino acid peptide sequence: Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg (MRWQEMGYIFYPRKLR).
Discovered during genomic screenings of small open reading frames (sORFs) in mitochondrial DNA, MOTS-c acts as a retrograde signal transmitter. Under cellular stress or metabolic shifts, MOTS-c translocates from the mitochondrion to the cell nucleus, where it binds to specific genomic regions to modulate nuclear gene expression. Detailed technical literature on this class of signaling agents can be reviewed in our mitochondrial-derived peptides research guide.
Preclinical studies suggest that MOTS-c operates as a master metabolic regulator at the cellular level. In vitro assays demonstrate that administration of synthetic MOTS-c influences cellular respiration, oxygen consumption rate (OCR), and extracellular acidification rate (ECAR) in cultured myoblasts and hepatocytes.
The primary mechanism of action identified in preclinical literature involves the regulation of the folate cycle and de novo purine biosynthesis. By inhibiting the folate cycle enzyme 5-aminoimidazole-4-carboxamide ribonucleotide transformylase (AICART), MOTS-c causes an intracellular accumulation of the intermediate AICAR. This accumulation directly stimulates 5'-AMP-activated protein kinase (AMPK), a central energy sensor in eukaryotic cells.
In animal study models, MOTS-c treatment has demonstrated significant capacity to restore metabolic homeostasis under nutrient-dense conditions. Rodent models subjected to high-fat diets (HFD) exhibited enhanced insulin sensitivity, reduced weight gain, and lower intramuscular lipid accumulation when treated with MOTS-c compared to control groups.
Researchers investigating metabolic pathways note that MOTS-c-mediated AMPK activation promotes glucose uptake in skeletal muscle independent of insulin signaling pathways. Additionally, in vitro data indicate that MOTS-c upregulates glucose transporter type 4 (GLUT4) translocation to the plasma membrane, offering a target for studying insulin-resistant cell lines. Further assay protocols and metabolic peptide data are available in the PX1 Research catalog.
Beyond baseline metabolic regulation, MOTS-c is extensively investigated for its role in physical performance adaptation and exercise-mimetic signaling. In rodent treadmill models, systemic administration of MOTS-c significantly enhanced running capacity, heat tolerance, and systemic energy expenditure in both young and aged mice.
In response to exercise-induced stress or metabolic strain, endogenous MOTS-c levels rise in skeletal muscle tissue and blood circulation. Preclinical findings indicate that nuclear translocation of MOTS-c during physical exertion interacts with heat shock factor 1 (HSF1) and antioxidant response elements (ARE), upregulating cytoprotective enzymes such as superoxide dismutase (SOD) and catalase. These pathways make MOTS-c a primary candidate for investigations into sarcopenia, aging, and exercise physiology.
A compliant, audit-ready Certificate of Analysis for MOTS-c must present clear, unedited raw data generated by an independent, ISO 17025 accredited analytical facility. When reviewing a MOTS-c COA sourced in the USA, laboratory procurement officers must verify several mandatory parameters:
First, **Purity by RP-HPLC**: The report must show a distinct single peak corresponding to MOTS-c, with an integration area reflecting ≥98.0% purity. Chromatograms should display baseline resolution without broad trailing or unidentified secondary peaks.
Second, **Identity by ESI-MS**: Electrospray ionization mass spectrometry must verify the theoretical monoisotopic or average molecular weight of MOTS-c (2174.6 Da). The mass spectrum must confirm the observe mass-to-charge ratios (m/z) matching the expected charged states ([M+2H]2+, [M+3H]3+).
Third, **Bacterial Endotoxin Testing**: Utilizing the Limulus Amebocyte Lysate (LAL) assay or recombinant Factor C (rFC) methodology, endotoxin levels must test below 0.01 EU/mg to prevent confounding immune or inflammatory responses in cell culture models.
At PX1 Research, every batch of synthesized peptide undergoes exhaustive quality control in cGMP-compliant facilities located in California and Arizona. We adhere strictly to US analytical standards to ensure reproducible batch-to-batch consistency for academic and commercial laboratory settings.
To learn more about analytical verification methodologies, review our technical articles on HPLC purity testing standards and endotoxin testing in research peptides. Every order from PX1 Research includes a physical and digital lot-specific COA, backed by our commitment to zero-filler, highly purified research compounds.
Lyophilized MOTS-c exhibits excellent stability when stored at -20°C or -80°C in a desiccated environment protected from light. For reconstitution in laboratory settings, researchers should utilize sterile Bacteriostatic Water (0.9% benzyl alcohol) or sterile PBS (pH 7.4) depending on the intended experimental assay.
When reconstituting, gently introduce the solvent along the glass vial wall to prevent shearing forces. Avoid aggressive vortexing; gentle swirl agitation is recommended until the lyophilizate is fully dissolved. Once reconstituted, liquid aliquots should be stored at -80°C to minimize freeze-thaw degradation cycles. For detailed reconstitution steps and concentration math, refer to our reconstitution protocol guide.
Mitochondrial-targeted peptides comprise distinct chemical structures and mechanisms of action. Comparing MOTS-c with other prominent mitochondrial research peptides highlights their unique research utility:
While MOTS-c primary targets the folate-AICAR-AMPK axis to regulate systemic energy homeostasis and glucose uptake, Humanin COA analysis reveals a 24-amino acid MDP that primarily functions as a cytoprotective and anti-apoptotic agent by binding Bax and IGFBP-3. In contrast, SS-31 research peptide (Elamipretide) is a synthetic tetrapeptide that selectively targets cardiolipin in the inner mitochondrial membrane to optimize electron transport chain efficiency and reduce reactive oxygen species (ROS) generation. Investigators often utilize these compounds in comparative panels to evaluate complementary facets of mitochondrial biology.
Procuring research compounds from verified USA suppliers eliminates international customs delays, unpredictable temperature excursions during transit, and non-compliant quality control practices. PX1 Research operates state-of-the-art facilities in California and Arizona, providing same-day dispatch for orders placed Monday through Friday before 3:00 PM PST.
Institutional laboratories requiring bulk quantities, custom synthesis options, or standing recurring shipments can establish dedicated institutional accounts through our wholesale lab account portal. All shipments are packaged in insulated, temperature-controlled containers to preserve molecular integrity throughout transit.
What exact information is included on a USA MOTS-c Certificate of Analysis?
A compliant USA MOTS-c COA includes the manufacturer's lot number, synthesis date, molecular weight (2174.6 Da), sequence verification, RP-HPLC chromatograms showing ≥98% purity, ESI-MS spectrum confirming identity, moisture content, and LAL endotoxin testing results (<0.01 EU/mg).
Why is endotoxin testing critical for MOTS-c research peptides?
Bacterial endotoxins (lipopolysaccharides) induce severe inflammatory responses in cellular assays and animal models, activating TLR4 pathways. High endotoxin levels yield false-positive or false-negative results in metabolic and signaling research. PX1 Research guarantees endotoxin levels <0.01 EU/mg.
How should MOTS-c be stored upon delivery to the laboratory?
Lyophilized MOTS-c should be stored at -20°C or -80°C in a dry, dark environment. Reconstituted solutions should be divided into single-use aliquots and stored at -80°C to prevent degradation from repeated freeze-thaw cycles.
What solvents are suitable for reconstituting MOTS-c in vitro assays?
MOTS-c readily dissolves in sterile laboratory-grade water, 0.9% sterile saline, or phosphate-buffered saline (PBS, pH 7.4). For long-term stored liquid aliquots or multi-use research applications, Bacteriostatic Water containing 0.9% benzyl alcohol is typically utilized.
Where is PX1 Research MOTS-c synthesized and shipped from?
PX1 Research peptides are manufactured in cGMP-compliant USA facilities and shipped directly from our primary distribution hubs in California and Arizona with same-day shipping on weekday orders.
Can MOTS-c be used in human subjects or clinical settings?
No. MOTS-c provided by PX1 Research is strictly designated for laboratory research use only (in vitro and preclinical animal studies). It is not intended for human consumption, clinical trials, therapeutic diagnostic procedures, or veterinary administration.
How does MOTS-c differ structural and functionally from Humanin?
MOTS-c is a 16-amino acid mitochondrial-derived peptide encoded in the 12S rRNA gene that primary targets metabolic regulation via the AMPK pathway. Humanin is a 24-amino acid peptide encoded in the 16S rRNA gene that primarily regulates apoptosis and cytoprotection through interactions with Bax and STAT3.
How do I verify the COA for my specific batch of PX1 MOTS-c?
Each PX1 Research vial features a lot number that corresponds directly to an accessible, downloadable COA PDF on our portal, displaying raw HPLC and mass spectrometry data from an independent ISO 17025 accredited laboratory.
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.