MOTS-C COA Lookup: Verify Your Lot Number

Overview of MOTS-c in Preclinical Research

Mitochondrial-derived peptides (MDPs) represent a crucial area of study in cellular energy regulation and metabolic signalling. Among these, the 16-amino-acid peptide MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA Type-c) has gained significant attention in preclinical investigations. Encoded within the mitochondrial genome rather than the nuclear genome, MOTS-c functions as an intercellular signal that translocates to the nucleus under metabolic stress.

In vitro data indicate that MOTS-c interacts directly with cellular metabolic pathways, notably regulating folate cycle dynamics and activating 5'-AMP-activated protein kinase (AMPK). Preclinical studies suggest that this peptide plays a central role in modulating glucose utilization, fatty acid oxidation, and systemic insulin sensitivity in rodent models. To ensure that experimental outcomes are attributable solely to the target sequence and not to synthesis side-products or contaminants, researchers require full analytical verification for every lot evaluated in the laboratory.

The Critical Role of Lot-Specific Certificate Verification

In peptide synthesis, minor variations in solid-phase peptide synthesis (SPPS) parameters, cleavage conditions, or purification runs can result in truncated sequences, deletion peptides, or residual counter-ions. Utilizing unverified reagents introduces uncontrolled variables into cell culture assays and animal models, potentially skewing enzymatic rates, cell viability measurements, or metabolic flux readings.

A lot-specific Certificate of Analysis (COA) serves as the primary document confirming that a given batch meets predefined chemical and microbiological specifications. Every production lot at PX1 Research undergoes rigorous third-party analytical testing prior to release. Accessing the specific documentation for your batch via our live COA lookup portal ensures complete traceability from synthesis through final packaging.

How to Find the Lot Number on Your MOTS-c Vial

Locating the batch identification code on PX1 Research packaging is straightforward. Each vial is labeled with a clear, durable print designed to withstand cryogenic and cold-chain storage conditions without degradation.

Inspect the side of the vial label adjacent to the compound name and mass specification. You will find a distinct alphanumeric sequence designated after the prefix 'LOT:' (e.g., LOT: MOTS-20240815-PX1). This unique identifier correlates directly to the master batch record, synthesis log, and third-party analytical testing reports archived in our system. Be sure to note the complete character string, including any hyphens, when conducting a documentation query.

Navigating the PX1 Research Live Certificate Library

To view or download the third-party analytical data for your compound, navigate directly to our searchable COA directory. This database archives full analytical reports for our complete catalog of research compounds, ensuring that laboratory personnel can access batch records at any time.

In the search interface, input the lot number printed on your vial. Alternatively, you can search by compound name to review historical lot data across our entire range of research peptides. Once the matching entry is located, you can view the high-resolution PDF report directly in your browser or download it for inclusion in your laboratory's electronic notebook (ELN) records.

Interpreting HPLC Data: Peak Area and Chemical Purity

High-Performance Liquid Chromatography (HPLC) is the gold-standard method for determining the chemical purity of synthetic peptides. The HPLC section of the COA displays a chromatogram representing signal intensity (measured in milli-absorbance units, mAU) against retention time (minutes) as the compound elutes through a reverse-phase column.

When evaluating the HPLC report for your MOTS-c lot, key parameters to inspect include:

• Primary Retention Time: The distinct main peak corresponding to the target sequence, which should account for the vast majority of the total integrated peak area. • Purity Percentage: Calculated by dividing the area of the main target peak by the sum of all integrated peak areas. PX1 Research requires a minimum HPLC purity threshold of ≥98.0% for research peptides. • Immaturity/Deletion Peaks: Secondary baseline peaks indicate minor synthesis impurities. A clean baseline with minimal secondary peak integration confirms precise purification.

Mass Spectrometry: Confirming Sequence Mass and Identity

While HPLC confirms the relative purity of a sample, it does not confirm molecular identity. Mass Spectrometry (MS)—typically via Electrospray Ionization (ESI-MS) or Matrix-Assisted Laser Desorption/Ionization (MALDI-TOF)—is utilized to measure the exact mass-to-charge ratio (m/z) of the molecule.

On the COA, compare the 'Observed Mass' against the theoretical molecular mass of MOTS-c (1875.2 g/mol for the base sequence). The spectrum should display prominent ionic peaks corresponding to the protonated species (such as [M+H]+, [M+2H]2+, or [M+3H]3+). Matching observed mass values within tight tolerances (typically ±1 Da) confirms that the synthesized peptide possesses the correct primary amino acid sequence without unintended chemical modifications.

Bacterial Endotoxin Testing and Quality Standards

Endotoxins—lipopolysaccharides (LPS) derived from the outer membrane of Gram-negative bacteria—are potent inflammatory triggers. In cell culture assays or animal studies, presence of endotoxins can induce non-specific immune responses, upregulate inflammatory cytokines, and confound experimental results regarding metabolic signal transduction.

PX1 Research conducts kinetic Limulus Amebocyte Lysate (LAL) testing on every lot to quantify endotoxin levels. The resulting COA explicitly lists the endotoxin content, expressed in Endotoxin Units per milligram (EU/mg). All lots intended for delicate in vitro and animal models must pass strict endotoxin thresholds (typically <0.1 EU/mg), ensuring that cellular responses observed during experiments are entirely attributable to peptide interaction.

Comparing MOTS-c with Related Mitochondrial Research Peptides

MOTS-c belongs to a broader class of mitochondria-targeted peptides evaluated in metabolic and cellular longevity research. When designing multi-compound comparative studies, investigators frequently analyze several distinct targets within the same functional pathway.

For instance, while MOTS-c acts primarily as a nuclear-translocating metabolic regulator, compounds such as SS-31 target cardiolipin within the inner mitochondrial membrane to optimize electron transport chain efficiency and reduce reactive oxygen species (ROS). Similarly, Humanin—another mitochondria-derived peptide—is extensively studied for cytoprotective and anti-apoptotic pathways. Reviewing analytical profiles across all these targets within our mitochondrial research library ensures that comparative assays utilize standardized, ultra-pure Reagents.

Laboratory Reconstitution and Handling Protocols

Lyophilized MOTS-c should be stored at -20°C or -80°C upon receipt to maintain long-term stability. Prior to reconstituting for laboratory use, allow the vial to equilibrate to room temperature to prevent atmospheric moisture condensation inside the container.

Reconstitution should be performed under a sterile laminar flow hood using bacteriostatic water or sterile phosphate-buffered saline (PBS, pH 7.4), depending on the requirements of the specific assay protocol. Avoid vigorous vortexing, as mechanical shear stress can disrupt peptide secondary structures; instead, gently swirl the vial until the lyophilized cake is fully dissolved. For accurate volumetric preparation and molar concentration calculations, utilize our interactive reconstitution calculator.

PX1 Research Commitment: USA Quality and Institutional Accounts

PX1 Research is dedicated to supplying the scientific community with reliable, highly characterized research chemicals. Our compounds are manufactured in state-of-the-art facilities compliant with Good Manufacturing Practice (GMP) standards, with final analytical verification conducted in accredited ISO 17025 laboratories located in the United States.

We offer streamlined procurement for academic institutions, biotechnology organizations, and contract research organizations (CROs). To establish dedicated lab accounts, inquire about volume pricing, or request customized analytical validation protocols, visit our wholesale portal or contact our technical support staff directly.