MOTS-c (mitochondrial open reading frame of the 12S rRNA-c) is a 16\u2011amino\u2011acid peptide encoded within the mitochondrial genome. First identified and characterized in 2015 by researchers at the University of Southern California, this peptide has attracted significant interest in molecular and cellular biology due to its proposed role in modulating metabolic pathways and cellular stress responses. Laboratory investigations focus on its translocation from the mitochondria to the nucleus under certain conditions, where it can influence the expression of nuclear genes involved in energy homeostasis.<\/p>\n
In research settings, MOTS-c is primarily studied to understand mitochondrial communication with the nucleus\u2014a process often referred to as mitonuclear crosstalk. Experimental models examine how the peptide interacts with folate\u2011dependent purine biosynthesis, AMP\u2011activated protein kinase (AMPK), and sirtuin pathways. These studies aim to elucidate fundamental mechanisms of metabolic regulation, insulin sensitivity, and age\u2011related physiological changes. All findings published to date are derived from in vitro<\/em> cellular assays or animal models; no conclusions regarding human application can be drawn.<\/p>\n The growing demand for high\u2011purity MOTS-c in academic and pharmaceutical research laboratories has spurred development of robust supply chains. Investigators require the peptide in quantities ranging from milligrams for initial exploratory work to multi\u2011gram batches for more extensive longitudinal studies. All MOTS-c products referenced in this article are supplied exclusively for laboratory research purposes and are not intended for any in\u2011human or veterinary use.<\/p>\n China has become a significant hub for peptide synthesis, supported by decades of investment in chemical infrastructure and a large talent pool of synthetic organic chemists. When sourcing MOTS-c, many research procurement specialists consider Chinese manufacturers for several well\u2011documented operational advantages.<\/p>\n Leading Chinese peptide producers operate fully automated solid\u2011phase peptide synthesizers capable of handling synthesis scales from a few milligrams to hundreds of grams. This scalability means a single contract partner can support a project from early\u2011stage feasibility testing through to large\u2011scale preclinical investigations without requiring re\u2011validation of the synthetic route. Many facilities maintain reactor arrays for parallel synthesis, which improves throughput and reduces lead times for custom peptide requestions.<\/p>\n The cost efficiency of Chinese manufacturing is not solely a function of labor. Integrated domestic supply chains for protected amino acids, coupling reagents, and high\u2011purity solvents diminish reliance on imported raw materials. Additionally, continuous power and utilities in dedicated industrial parks lower overhead, while proximity to major international shipping hubs streamlines export logistics. Buyers often observe that the combination of raw material access and optimized production workflows results in a lower cost per gram without compromising on the analytical specifications required for research-grade peptides.<\/p>\n Beyond catalog MOTS-c, many Chinese peptide manufacturers offer tailored synthesis services. Common modifications requested by researchers include N\u2011terminal acetylation, C\u2011terminal amidation, or the incorporation of labeled amino acids (stable isotopes) for mass spectrometry\u2011based quantification. Some laboratories require the peptide with specific counter\u2011ions (e.g., acetate or trifluoroacetate) to match their experimental buffers. Reputable manufacturers will discuss sequence feasibility, solubility challenges, and provide preliminary purity data before undertaking a custom synthesis project.<\/p>\n Identifying a dependable supplier requires systematic scrutiny of quality documentation and manufacturing practices. The following criteria are critical for researchers and procurement officers evaluating a MOTS\u2011c manufacturer in China.<\/p>\n Research\u2011grade MOTS\u2011c should be characterized by high\u2011performance liquid chromatography (HPLC) and mass spectrometry (MS) as a minimum. A standard certificate of analysis (COA) will report the peptide\u2019s purity, typically \u226595% or \u226598%, depending on the grade ordered, along with the HPLC retention time and the observed molecular ion peak consistent with the theoretical mass (theoretical monoisotopic mass of MOTS\u2011c is 2174.2 Da). Some suppliers include an HPLC chromatogram and an electrospray ionization mass spectrum directly on the COA, allowing the buyer to verify peak symmetry and the absence of deletion or truncated sequences.<\/p>\n Comprehensive quality control extends beyond HPLC and MS. For peptides used in cell\u2011based assays, endotoxin levels become relevant; a reliable manufacturer will test using the Limulus amebocyte lysate (LAL) method and report the result in EU\/mg. Residual trifluoroacetic acid (TFA) from the cleavage step may interfere with certain biological assays, so quantification by ion chromatography or equivalent should be available. Water content, determined by Karl Fischer titration, and residual solvent analysis by gas chromatography are additional parameters that characterize the peptide\u2019s suitability for quantitative research. Requesting a full analysis report before shipment is a standard industry practice.<\/p>\n While MOTS\u2011c is not a pharmaceutical product, a manufacturer\u2019s adherence to quality management standards indicates a systematic approach to production. ISO 9001 certification confirms that the company follows documented procedures for process control and continuous improvement. Some peptide manufacturers have voluntarily adopted elements of Good Manufacturing Practice (GMP) for research chemicals, which can include batch traceability, equipment qualification, and environmental monitoring. If a research project expects to transition to IND\u2011enabling studies, it is prudent to inquire whether the manufacturer can provide documentation aligned with relevant regulatory guidelines, even though the current material is solely for laboratory investigation.<\/p>\n Understanding the synthetic route behind MOTS\u2011c helps researchers interpret batch\u2011to\u2011batch consistency and troubleshoot any experimental anomalies. The overwhelming majority of research\u2011grade MOTS\u2011c is produced via Fmoc solid\u2011phase peptide synthesis (SPPS).<\/p>\n In SPPS, the C\u2011terminal amino acid of MOTS\u2011c (arginine) is anchored to a polymeric resin through a linker moiety. The Fmoc (9\u2011fluorenylmethoxycarbonyl) group temporarily protects the \u03b1\u2011amino function of each incoming amino acid. The synthesis cycle follows a repetitive sequence: deprotection of the Fmoc group using a base (commonly 20% piperidine in dimethylformamide), washing, activation of the next Fmoc\u2011protected amino acid with a coupling reagent (such as HBTU or HATU) in the presence of a base, coupling to the growing peptide chain, and final washing. Each step is monitored, often by conductivity or colorimetric tests, to ensure complete deprotection and coupling efficiency. Because MOTS\u2011c is a relatively short peptide (16 residues), the synthesis is typically straightforward, with low risk of aggregation\u2011related deletion products.<\/p>\n After the last amino acid has been coupled, the peptide\u2011resin is treated with a cleavage cocktail\u2014usually trifluoroacetic acid (TFA) with scavengers such as triisopropylsilane and water. This simultaneously releases the peptide from the resin and removes side\u2011chain protecting groups. The crude peptide is precipitated in cold diethyl ether, centrifuged, and dried. Subsequent purification is performed by reverse\u2011phase HPLC using a C18 column with a gradient of acetonitrile in water (both containing 0.1% TFA). Fractions matching the target purity are pooled and lyophilized to yield the final product as a white to off\u2011white powder. Ion exchange chromatography may be employed to reduce TFA content if the researcher requires acetate salt form.<\/p>\n Receiving peptides in a condition that preserves their structural integrity is essential for experimental reproducibility. MOTS\u2011c, like many peptides, is hygroscopic and can be susceptible to oxidation or aggregation under inappropriate storage conditions.<\/p>\n Manufacturers typically ship MOTS\u2011c in lyophilized form, often under vacuum or inert gas (argon or nitrogen), sealed in glass vials or high\u2011density polyethylene containers. For international shipments, especially during warmer months, cold chain packaging is employed. This may include gel ice packs, phase\u2011change materials, or dry ice, depending on the transit duration and destination. While lyophilized MOTS\u2011c is stable for short periods at ambient temperature, maintaining a low temperature (2\u20138\u00b0C or frozen) during carriage minimizes any risk of degradation. Upon arrival, researchers are advised to store the peptide as recommended on the material safety data sheet (MSDS), commonly at -20\u00b0C or below, protected from light and moisture.<\/p>\n Cross\u2011border movement of research peptides demands accurate paperwork. A standard shipment will include a commercial invoice describing the product as a synthetic peptide for laboratory research use, the certificate of analysis, and the MSDS. The harmonized system (HS) code must correctly classify the product as a biochemical reagent. Any misdeclaration can cause delays. It is the purchaser\u2019s responsibility to ascertain that the import of MOTS\u2011c complies with the regulations of the destination country. Some jurisdictions require an import license or a declaration from the receiving institution. Experienced Chinese manufacturers often assist by providing pre\u2011formatted documentation and sharing courier\u2011specific guidance, but they cannot assume legal responsibility for import clearance.<\/p>\n All research chemicals, including MOTS\u2011c, are intended solely for bench\u2011top experimentation. The buyer assumes the obligation to use the material in accordance with institutional safety protocols and applicable laws. This includes proper handling, waste disposal, and ensuring that the peptide is not diverted for any non\u2011research purpose. Manufacturers routinely include a disclaimer on quotations and invoices reiterating the research\u2011only nature of the product.<\/p>\n What is the typical lead time for a bulk order of MOTS\u2011c?<\/strong> How can I verify the identity of the MOTS\u2011c peptide upon receipt?<\/strong> Is it possible to order MOTS\u2011c in a salt form other than TFA?<\/strong> What shipping option is recommended for temperature\u2011sensitive peptides?<\/strong> Can a manufacturer provide a sample for quality evaluation before a large purchase?<\/strong> Selecting a reliable MOTS-c manufacturer in China requires a methodical evaluation of each supplier\u2019s technical competence, quality control infrastructure, and transparency. By insisting on detailed HPLC and mass spectrometry data, comprehensive residual impurity reporting, and evidence of adherence to recognized quality management systems such as ISO 9001, research organizations can mitigate the risk of receiving substandard material. The established synthetic pipeline in China, rooted in Fmoc\u2011SPPS, is capable of delivering research\u2011grade MOTS\u2011c with the consistency demanded by rigorous experimental protocols.<\/p>\n Ultimately, a partnership built on clear communication, documented analytical specifications, and mutual understanding of regulatory boundaries serves the long\u2011term interests of the research community. Every interaction should reinforce the principle that these products exist solely to advance scientific knowledge through controlled laboratory investigation.<\/p>\n Research use only note: All information provided in this article pertains exclusively to the use of MOTS\u2011c as a research tool in laboratory settings. This peptide is not for human or animal application, and no therapeutic, diagnostic, or clinical use is suggested or implied. Any procurement must comply with all applicable local and international laws governing research chemicals.<\/em><\/p>\n For research use only. Not for human or veterinary use.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Introduction to MOTS-c in Research MOTS-c (mitochondrial open reading frame of the 12S rRNA-c) is a 16\u2011amino\u2011acid peptide encoded within the mitochondrial genome. First identified and characterized in 2015 by researchers at the University of Southern California, this peptide has attracted significant interest in molecular and cellular biology due to its proposed role in modulating […]<\/p>\n","protected":false},"author":1,"featured_media":1873,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"news_category":[],"class_list":["post-1872","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\nWhy Choose a Chinese Manufacturer for MOTS-c<\/h2>\n
Advanced Synthesis Capabilities and Scalability<\/h3>\n
Competitive Cost Structures<\/h3>\n
Custom Synthesis and Modification Services<\/h3>\n
Key Considerations When Selecting a MOTS-c Manufacturer<\/h2>\n
Purity Assessment and Analytical Documentation<\/h3>\n
Quality Control Beyond Primary Purity<\/h3>\n
Manufacturing Standards and Regulatory Compliance<\/h3>\n
Manufacturing Process for MOTS-c Peptide<\/h2>\n
Solid\u2011Phase Peptide Synthesis with Fmoc Chemistry<\/h3>\n
Cleavage, Deprotection, and Purification<\/h3>\n
Shipping and Logistics for Research Peptides<\/h2>\n
Temperature\u2011Controlled Packaging<\/h3>\n
Customs Clearance and Import Documentation<\/h3>\n
End\u2011User Accountability<\/h3>\n
Frequently Asked Questions (FAQ)<\/h2>\n
\nLead times vary by manufacturer and order size. For catalog quantities (e.g., 10 mg to 1 g) many suppliers can dispatch within 3\u20137 business days after payment confirmation. Larger custom synthesis batches may require 2\u20134 weeks for production, purification, and quality control release. Always confirm the estimated shipment date in the proforma invoice.<\/p>\n
\nYou can compare the mass spectrometry data on the COA with the theoretical molecular weight of 2174.2 Da. In\u2011house LC\u2011MS analysis on your own system, using a small aliquot, will confirm that the observed m\/z values (typically the [M+3H]\u00b3\u207a and [M+4H]\u2074\u207a ions) match the expected charge states. The HPLC retention time under the same chromatographic conditions should also be compatible.<\/p>\n
\nYes, many manufacturers offer acetate or hydrochloride salt conversion as a post\u2011purification step. Specify your requirement when requesting a quotation because salt conversion may slightly impact the net peptide content and should be reflected in the COA.<\/p>\n
\nInternational courier services (e.g., FedEx, DHL) with temperature\u2011controlled packaging are standard. For destinations with extreme temperatures, manufacturers may recommend a validated shipper with phase\u2011change material and a temperature logger. Discuss the packaging configuration with the supplier before dispatch.<\/p>\n
\nMany reputable firms will supply a small sample (often 1\u20135 mg) for a nominal fee or even free of charge, although the shipping cost is usually borne by the requester. This allows the research team to independently confirm purity and solubility in their specific assay buffer. Request the complete analytical data sheet with the sample.<\/p>\nConclusion<\/h2>\n