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MDP Research: MOTS-c Discovery History | Midwest Peptide

MOTS-c and Metabolic Homeostasis: AMPK Pathway ResearchPrev|MOTS-c in Research: A Mitochondrial-Derived Peptide Literature ReviewNext

Mitochondrial-Derived Peptides and the Discovery of MOTS-c in Research

Q: Is MOTS-c approved for human use?

No. MOTS-c is not approved by the FDA for any human therapeutic use. It is supplied strictly for in-vitro and preclinical research purposes by qualified investigators.

MOTS-c · Published April 9, 2026 · Updated May 18, 2026 · 9 min read

Quick Answer

Mitochondrial-derived peptide research covers the discovery of MOTS-c, the broader MDP family including humanin, and the micropeptide research field encoded within mitochondrial DNA. Studies examine MDP signaling, AMPK pathway activation, and roles in metabolic and aging research models. For research use only, not for human consumption.

Mitochondrial-Derived Peptides and the Discovery of MOTS-c in Research

Research Use Only. All products are strictly for research use only (RUO). Not for human consumption. Products on this site are not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the FDA. By purchasing, you agree that you are a qualified researcher and that products will be used solely for in-vitro research purposes.

What Are Mitochondrial-Derived Peptides?
The Discovery of MOTS-c
The 12S rRNA Gene and MOTS-c
Humanin and Related MDPs
MDP Research and Cellular Biology
Bioinformatic Methods and MDP Identification
MDPs and Micropeptide Research
Open Research Questions
Conclusion
Related Research Articles
Explore Related Products
Frequently Asked Questions
Glossary

Mitochondrial-derived peptide research provides the historical and biochemical foundation for understanding MOTS-c as a research tool. MOTS-c was identified in 2015 as one of the first characterized members of the mitochondrial-derived peptide (MDP) family, representing a significant conceptual advance in mitochondrial biology. As the discovery and origins component of the MOTS-c research cluster, this article reviews the published literature on the discovery of mitochondrial-derived peptides and on the broader context for MDP research.

Frequently Asked Questions

What is MOTS-c in research contexts?

MOTS-c is a 16-amino-acid mitochondrial-derived peptide encoded within the 12S rRNA region of mitochondrial DNA. It is studied in preclinical research as an exercise mimetic, an AMPK activator, and a regulator of metabolic homeostasis and aging biology.

How was MOTS-c discovered as a mitochondrial-derived peptide?

MOTS-c was identified by the Cohen lab in 2015 as a 16-amino-acid peptide encoded within the 12S rRNA region of mitochondrial DNA. It was the first mitochondrial-derived peptide shown to function as an exercise mimetic, expanding the recognized roles of mitochondrial DNA.

What other mitochondrial-derived peptides exist?

The MDP family includes humanin (the founding member, 24 amino acids), MOTS-c, and the SHLP1 to SHLP6 family. Each is encoded within mitochondrial rRNA regions and demonstrates distinct biological activities including neuroprotection, metabolic regulation, and cellular signaling.

Is MOTS-c approved for human use?

Glossary

Key terms used in this article.

Mitochondrial-Derived Peptide (MDP): A class of small bioactive peptides encoded within the mitochondrial genome and translated within or near mitochondria.
AMPK: AMP-activated protein kinase, a cellular energy sensor activated under low ATP conditions to restore metabolic homeostasis.
Exercise Mimetic: A compound that produces molecular and physiological adaptations associated with physical exercise without requiring activity.
Mitochondrial Biogenesis: The cellular process of generating new mitochondria, regulated by PGC-1 alpha and other transcriptional coactivators.
Humanin: The first mitochondrial-derived peptide discovered, a 24-amino-acid peptide with cytoprotective and neuroprotective effects.
12S rRNA: The smaller mitochondrial ribosomal RNA, the genomic region encoding MOTS-c within its sequence.

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What Are Mitochondrial-Derived Peptides?

Mitochondrial-derived peptides (MDPs) are a family of small peptides encoded by short open reading frames within the mitochondrial genome. The recognition that the mitochondrial genome encodes biologically active peptides beyond the well known mitochondrial proteins represented a significant conceptual advance in cellular biology when these peptides were first identified.

Traditional understanding of the mitochondrial genome focused on its role in encoding a small number of proteins involved in oxidative phosphorylation, along with the ribosomal RNA and transfer RNA needed for mitochondrial protein synthesis. The MDP family expands this understanding by adding a category of biologically active peptides encoded by short open reading frames that were not previously characterized as protein-coding sequences.

The MDPs identified to date include MOTS-c (encoded by the 12S rRNA gene), humanin (encoded by the 16S rRNA gene), and the SHLP (small humanin-like peptides) family. Together, these peptides constitute the known MDP family, although additional members may be identified through ongoing research on the mitochondrial genome and on the broader category of micropeptides.

The Discovery of MOTS-c

MOTS-c was identified in 2015 by a research group studying small open reading frames in the mitochondrial genome. The identification involved bioinformatic analysis of mitochondrial sequences to predict the existence of biologically active peptides encoded by previously unrecognized open reading frames, followed by experimental validation of the predicted peptides.

The MOTS-c discovery was a significant advance because it characterized one of the first specific members of the MDP family beyond humanin (which had been identified earlier). The discovery established that the mitochondrial genome encodes multiple biologically active peptides through small open reading frames in the rRNA gene regions, opening up a broader research field on mitochondrial-derived signaling.

The 16 amino acid length of MOTS-c is typical for MDP family members, which are generally short peptides encoded by relatively brief open reading frames. The chemical synthesis of MOTS-c for research applications has supported the systematic characterization of its biological functions in cell culture and animal model studies since its identification.

The 12S rRNA Gene and MOTS-c

MOTS-c is encoded within the mitochondrial 12S rRNA gene, which traditionally has been understood as encoding the smaller of the two mitochondrial ribosomal RNAs needed for mitochondrial protein synthesis. The recognition that this gene also contains a small open reading frame encoding a biologically active peptide added a new dimension to the understanding of mitochondrial gene function.

The location of the MOTS-c open reading frame within the 12S rRNA gene is one of the more interesting aspects of its biology. The peptide is encoded in a region that overlaps with the rRNA function, raising questions about how the cell coordinates the production of both the rRNA and the peptide from the same genetic region. These questions are still being characterized in research.

The translation of MOTS-c involves recognition of its small open reading frame by ribosomes and production of the mature peptide through standard protein synthesis machinery. The specific details of how MOTS-c translation is regulated and how the peptide is processed and secreted from cells are areas of active research investigation.

Humanin was the first characterized member of the MDP family and provides important context for understanding MOTS-c research. Humanin was identified in 2001 from research on protective factors in brain tissue, and subsequent characterization showed that it is encoded by an open reading frame within the mitochondrial 16S rRNA gene. The identification of humanin established the conceptual framework for the MDP family and motivated subsequent research that led to the discovery of MOTS-c and other MDPs.

Humanin has been studied for various biological effects including neuroprotection, cellular survival under stress, and metabolic regulation. The accumulated humanin research literature provides a substantial foundation for understanding MDP biology and for placing MOTS-c within the broader MDP context.

The SHLP (small humanin-like peptides) family was identified through additional bioinformatic analysis of the mitochondrial genome and represents another category of MDPs related to humanin. The SHLP peptides have their own research literature on biological functions and contribute to the broader picture of mitochondrial-derived signaling.

Together, MOTS-c, humanin, and the SHLP family constitute the major characterized MDPs to date. Each has its own specific biological functions and research applications, and together they provide a more comprehensive picture of mitochondrial-derived peptide signaling than any single family member alone.

MDP Research and Cellular Biology

The research on MDPs has expanded the understanding of cellular biology in several important ways. First, it has demonstrated that the mitochondrial genome encodes biologically active peptides beyond the previously recognized mitochondrial proteins, expanding the functional scope of the mitochondrial genetic system. Second, it has identified a new category of biologically active small peptides that contribute to integrated cellular signaling. Third, it has provided new research tools for studying mitochondrial biology and integrated cellular metabolism.

The functional roles of MDPs include effects on cellular metabolism, cellular stress responses, mitochondrial function, and various other endpoints relevant to integrated cellular biology. The combined research on different MDP family members has contributed to a more comprehensive understanding of how mitochondrial-derived signaling participates in cellular biology beyond the traditional roles of mitochondrial proteins.

For more on the AMPK pathway research that connects MOTS-c to broader cellular metabolism, see our companion article on MOTS-c and metabolic homeostasis: AMPK pathway research.

Bioinformatic Methods and MDP Identification

The discovery of MDPs has been supported by bioinformatic methods that can identify small open reading frames in genomic sequences. These methods have evolved substantially in recent years and have enabled the identification of many small peptides that were not recognized by traditional gene prediction approaches.

The application of bioinformatic methods to the mitochondrial genome has been particularly productive in identifying MDPs. The relatively small size of the mitochondrial genome and its well characterized sequence make it amenable to systematic analysis for small open reading frames. The combination of bioinformatic prediction with experimental validation has been the key approach for identifying new MDPs.

Future research on MDPs will likely continue to use these methods to identify additional family members and to characterize their biological functions. The accumulated research base on MOTS-c, humanin, and the SHLP family provides the foundation for understanding how these methods can be applied to identify additional biologically active peptides encoded by previously unrecognized genomic sequences.

MDPs and Micropeptide Research

The MDP family is part of the broader category of micropeptides and small open reading frame (smORF) encoded peptides that are increasingly recognized in cellular biology research. Micropeptides are small peptides encoded by short open reading frames that were not previously characterized as protein-coding sequences. The recognition of micropeptides as a significant category of biologically active molecules has expanded the understanding of cellular protein diversity.

The micropeptide research field has identified biologically active small peptides encoded by various genomic sources, including the mitochondrial genome (the MDPs), nuclear genes that contain previously unrecognized open reading frames, and various other sources. Together, these discoveries are reshaping the understanding of protein diversity in cellular biology.

MOTS-c is one of the better characterized examples of a micropeptide in research literature, with substantial published research on its biological functions and pharmacological applications. The accumulated research on MOTS-c provides a model for how micropeptide research can be conducted and for how individual members of these new peptide families can be characterized as research tools.

Open Research Questions

Several open research questions remain in the MDP discovery and origins literature. These include the identification of additional MDP family members through continued bioinformatic and experimental research, the characterization of how MDP translation is regulated within the mitochondrial gene context, and how the various MDPs interact with each other and with traditional mitochondrial proteins in integrated cellular signaling. Each of these is a legitimate research opportunity for investigators studying mitochondrial-derived peptide biology.

Conclusion

Mitochondrial-derived peptide research provides the historical and biochemical foundation for understanding MOTS-c as a research tool. The discovery of MOTS-c in 2015 and its position within the broader MDP family represented a significant advance in mitochondrial biology and established a new category of research compounds for studying integrated cellular metabolism. For investigators using MOTS-C 10mg as a research tool, the MDP discovery literature provides essential context for understanding the molecule.

For more on the full MOTS-c research cluster, see the pillar overview article and the supporting articles on each major topic.

MOTS-c is supplied by Midwest Peptide for research use only and is not intended for human administration.

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Age Verification

Mitochondrial-Derived Peptides and the Discovery of MOTS-c in Research

Frequently Asked Questions

What is MOTS-c in research contexts?

How was MOTS-c discovered as a mitochondrial-derived peptide?

What other mitochondrial-derived peptides exist?

Is MOTS-c approved for human use?

Glossary

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What Are Mitochondrial-Derived Peptides?

The Discovery of MOTS-c

The 12S rRNA Gene and MOTS-c

MDP Research and Cellular Biology

Bioinformatic Methods and MDP Identification

MDPs and Micropeptide Research

Open Research Questions

Conclusion

Ready to Start Your Research?

Where can researchers source third-party tested MOTS-c?

What's the Cheapest Way to Get Tirzepatide (GLP-2 TZ) for Research?

Age Verification

Mitochondrial-Derived Peptides and the Discovery of MOTS-c in Research

Frequently Asked Questions

What is MOTS-c in research contexts?

How was MOTS-c discovered as a mitochondrial-derived peptide?

What other mitochondrial-derived peptides exist?

Is MOTS-c approved for human use?

Glossary

More from the Blog

Subcutaneous vs Intranasal: Choosing an Administration Route for DSIP, Selank, and Kisspeptin in Research

Can I Still Buy Compounded Tirzepatide? (2026 Research Context)

What Are Mitochondrial-Derived Peptides?

The Discovery of MOTS-c

The 12S rRNA Gene and MOTS-c

Humanin and Related MDPs

MDP Research and Cellular Biology

Bioinformatic Methods and MDP Identification

MDPs and Micropeptide Research

Open Research Questions

Conclusion

Related Research Articles

Explore Related Products

Ready to Start Your Research?

Where can researchers source third-party tested MOTS-c?

What's the Cheapest Way to Get Tirzepatide (GLP-2 TZ) for Research?