Targeted Peptide Quantification Service

MtoZ Biolabs utilizes a high-resolution liquid chromatography-tandem mass spectrometry (LC-MS/MS) platform to offer the targeted peptide quantification service which enables highly sensitive and quantitative analysis of specific target peptides, providing precise measurement of target protein expression levels or modification states. This service is widely applied in biomarker validation, drug target research, and protein regulation studies, offering reliable data support for accurate quantitative research.

 

Overview

Peptides are functional molecules composed of amino acids linked by peptide bonds and are widely distributed in living organisms, participating in essential processes such as signal transduction, enzymatic reactions, and immune regulation. Targeted peptide quantification is a precision detection approach based on mass spectrometry that allows for sensitive and reproducible quantification of specific peptides. This strategy reflects the actual expression levels and modification dynamics of target proteins and plays a crucial role in biomarker discovery, drug mechanism validation, and protein function research.

 

Targeted Peptide Quantification Service at MtoZ Biolabs

1. MRM Targeted Quantitative Analysis

MtoZ Biolabs employs Multiple Reaction Monitoring (MRM) technology to perform highly sensitive and multiplexed quantitative analysis of specific peptides, enabling accurate detection of target proteins in complex samples.

 

2. PRM High-Resolution Quantitative Analysis

Based on Parallel Reaction Monitoring (PRM) technology, MtoZ Biolabs utilizes high-resolution mass spectrometry to achieve full ion detection, ensuring exceptional accuracy and specificity in quantitative results.

 

3. Stable Isotope-Labeled Quantification

MtoZ Biolabs applies stable isotope-labeled peptides as internal standards to achieve absolute quantification of target peptides, providing reliable references for protein expression evaluation and biomarker studies.

 

Workflow of Targeted Peptide Quantification Service

1. Sample Preparation

Proteins are extracted, enzymatically digested, and peptides purified to ensure stable target peptide signals without impurity interference.

 

2. Target Selection and Method Development

Characteristic peptide sequences are selected based on target protein information, and MRM or PRM parameters are optimized to establish highly specific analytical methods.

 

3. Liquid Chromatography and Mass Spectrometry Detection

High-performance liquid chromatography (LC) coupled with mass spectrometry (MS) is used to achieve highly sensitive quantitative detection of target peptides.

 

4. Data Processing and Quantification

Professional software is used for peak area integration, calibration curve fitting, and signal comparison to obtain accurate relative or absolute quantification results.

 

5. Result Reporting

A comprehensive report containing spectra, quantitative data, and statistical analysis is generated to provide reliable data support for subsequent biological studies.



Reyes, A V. et al. Frontiers in Plant Science, 2022.

Figure 1. Workflow of Parallel Reaction Monitoring.

 

Why Choose MtoZ Biolabs?

✅ High Sensitivity Detection: Enables precise quantification of low-abundance target peptides.

✅ High Specificity Analysis: Accurately distinguishes target peptide signals through MRM and PRM acquisition modes.

✅ Strong Reproducibility: Standardized workflows ensure stable and reliable quantitative results.

✅ Expert Technical Support: Experienced mass spectrometry specialists provide method optimization and data interpretation.

✅ Comprehensive One-Stop Service: Covers the entire process from sample preparation and detection to data analysis and report generation.

 

Applications of Targeted Peptide Quantification Service

1. Targeted Quantitative Validation

Used to verify the expression levels of specific target proteins or pathway-related peptides, supporting quantitative confirmation of research findings.

 

2. Signaling Pathway Studies

Quantifies expression differences of regulatory peptides in key pathways to assist in elucidating cellular signaling networks.

 

3. Protein Expression Verification

Performs targeted detection of characteristic peptides from specific proteins to confirm expression level changes.

 

4. Metabolic and Functional Analysis

Evaluates dynamic variations of target peptides under specific physiological or pathological conditions to explore metabolic regulation mechanisms.

 

5. Quality Control and Consistency Assessment

Applied for consistency testing among biological products or sample batches, ensuring comparability and data reliability.

 

Deliverables

1. Comprehensive Experimental Details

2. Materials, Instruments, and Methods

3. Targeted Peptide Quantification Result Tables

4. Quantitative Spectra and Peak Area Plots

5. Bioinformatics Analysis

6. Raw Data Files

 

FAQ

Q1: What types of samples are suitable?

A1: The targeted peptide quantification service is suitable for various sample types, including cell lysates, tissue extracts, serum, plasma, and purified proteins. To ensure analytical accuracy, samples should have high purity, be free from salts, surfactants, and buffer interference, and contain target peptide concentrations within the detectable range.

 

Q2: What is the service general workflow?

A2:

 



Q3: What data formats are provided?

A3: The deliverables include standardized, multi-format data outputs for convenient analysis and archiving. Typical deliverables include:

• Raw LC-MS/MS data files;

• Targeted peptide quantification result tables (Excel format);

• Quantitative spectra and peak area plots (TIFF or PNG format);

• Comprehensive analysis report (PDF format) detailing experimental conditions and results interpretation.

If special analytical requirements exist, data formats can be customized according to project specifications.

 

Q4: How should I prepare my samples?

A4: To ensure optimal data quality and reproducibility, please follow these sample preparation guidelines:

(1) Purity: Avoid high salt concentrations, buffer components, or and other impurities;

(2) Storage: Store at -20℃ for short-term or -80℃ for long-term preservation;

(3) Transport: Ship using cold chain or dry ice, ensuring containers are sealed and leak-proof;

(4) Information: Provide sample source, concentration, and target information to facilitate parameter optimization.

For more information, please refer to Sample Submission Guidelines for Proteomics, Sample Submission Guidelines for Metabolomics.

 

Start Your Project with MtoZ Biolabs    

Contact us to discuss your experimental design or request a quote. Whether you are investigating expression differences of specific peptides or analyzing quantitative variations in target proteins, MtoZ Biolabs provides accurate and efficient mass spectrometry-based quantitative analysis support.