Short Peptide Sequencing Service

MtoZ Biolabs provides short peptide sequencing service using high-resolution mass spectrometry platforms and optimized sequencing methods to deliver reliable solutions for short peptide sequence determination, modification identification, and structural confirmation. This service is suitable for drug development, natural product analysis, peptide material research, and life science studies, providing essential data support for mechanism exploration, structural validation, and quality control.

 

The Technical Basis of Short Peptide Sequencing

The short peptide sequencing service at MtoZ Biolabs is typically based on high-resolution LC-MS/MS, where amino acid sequences are determined through fragment ion information. The overall technical system consists of data acquisition strategies, fragmentation techniques, and sequence reconstruction methods, which work together to generate reliable sequencing results.

 

Technical Category	Technology Name	Functional Role	Applicable Peptide Types	Technical Features
Data Acquisition Strategy	Top Down Peptide Analysis	Direct fragmentation of intact short peptides for MS MS acquisition	Cyclic peptides, natural peptides, modified peptides, and structurally intact small peptides	Preserves full structural information, does not require enzymatic digestion, suitable for 2 to 50 aa, highly suitable for short peptide sequencing
Fragmentation Techniques	CID Collision-Induced Dissociation	Fragmentation induced by energetic collisions	General short peptides linear short peptides	Generates abundant fragments applicable to most peptide sequences
	HCD Higher Energy Collisional Dissociation	Generates high-energy fragments to improve sequence reconstruction	Short peptides requiring uniform fragmentation in De Novo sequencing	Producing more evenly distributed fragments improves sequencing accuracy
	ETD Electron Transfer Dissociation	Fragmentation through electron transfer	Modified short peptides PTM peptides with labile modifications	Preserves modifications ideal for PTM analysis
	EThcD ETD plus HCD combined fragmentation	Produces multiple ion series simultaneously	Difficult to fragment structurally complex peptides	b/y + c/z ion series increases coverage and confidence
Sequence Reconstruction Methods	De Novo Sequencing	Determines amino acid sequence through fragment ions	Unknown short peptides, natural peptides noncanonical peptides	Does not rely on the database's core method for short peptide sequencing
	Database Assisted Sequencing	Matches MS MS spectra with database entries	Short peptides with known origins, synthetic peptide verification	Fast and accurate, ideal for confirmation sequencing
Auxiliary Strategies	Amino Acid Composition Analysis	Determines amino acid composition	Difficult to fragment peptides with weak signal peptides	Helps improve the accuracy of sequence reconstruction
	Chemical Cleavage, such as CNBr	Cleaves at specific sites to increase fragment information	Cyclic peptides with repeated sequences	Enhances the readability of MS MS data
	Ring Opening Strategy for Cyclic Peptides	Linearizes cyclic structures before fragmentation	Cyclic peptides	Significantly improves the success rate of sequence reconstruction

 

Short Peptide Sequencing Service at MtoZ Biolabs

MtoZ Biolabs provides a mass spectrometry-based short peptide sequencing system designed to support comprehensive sequence confirmation. The service includes:

☑️ Short peptide sequence determination to analyze unknown sequences or confirm the consistency of known sequences

☑️ Modification site analysis to identify phosphorylation, acetylation, methylation, fatty acylation, and other basic modifications

☑️ Molecular weight confirmation to verify amino acid composition, sequence integrity, and potential peptide impurities

☑️ Cyclic peptide and complex peptide analysis with ring opening strategies and multi-fragmentation support

☑️ Peptide purity confirmation to evaluate sample composition for quality control

 

This service is suitable for research institutions, pharmaceutical companies, and peptide material development teams.

 

Workflow of Short Peptide Sequencing Service

 



Vitorino, R. et al. Expert Rev Proteomics. 2021.

Figure 1. Peptide Sequencing Workflow

  

Why Choose MtoZ Biolabs

1️⃣ High-resolution platforms using globally recognized mass spectrometry systems to ensure accurate sequencing

2️⃣ Extensive experience with short peptides, including natural peptides, signaling peptides, antimicrobial peptides, and cyclic peptides

3️⃣ Stable analytical workflow designed to reduce sample loss and minimize repeat measurements

4️⃣ Professional scientific team with extensive experience in proteomics and peptide structural analysis

5️⃣ Expandable output supporting downstream structural validation, quantitative analysis, and modification studies

 

Applications of Short Peptide Sequencing Service

1. Peptide drug development for confirming synthetic peptide sequences, impurities, and key structural segments

2. Natural product research for determining small peptide structures derived from plants, animals, or microorganisms

3. Signaling pathway and immunology research for identifying functional peptides, signaling peptides, and immune-related peptides

4. Peptide material design for verifying self-assembling peptides, functional peptides, and engineered peptides

5. Quality control for monitoring batch consistency and product integrity

 

Deliverables

1. Short peptide sequencing results

2. MS/MS fragmentation spectra and supporting evidence

3. Modification information if applicable

4. Molecular weight determination results

5. Standardized technical report

6. Data files for further analysis

 

The report is clearly structured and can be used for publication, project submission, or quality assessment.

 

FAQs

Q1. What types of samples are suitable?

Suitable samples include peptide powders, synthetic peptides, natural peptide extracts, and purified peptide fractions. Sequencing can be performed as long as the molecular weight is appropriate and impurities are not excessive.

 

Q2. What is the service's general workflow?

 

Q3. What data formats are provided?

MtoZ Biolabs provides comprehensive deliverables in standard formats to support downstream validation, publication, and regulatory documentation. Deliverables typically include:

• Raw MS MS data files generated from high-resolution LC-MS platforms

• Processed results in CSV or Excel formats, including sequence assignments, fragment ions, and precursor information

• A detailed PDF report summarizing analytical methods, QC metrics, and sequence interpretation

• High-resolution figures, spectra, and chromatograms in TIFF or PNG formats

Additional formats can be provided upon request to accommodate specific project needs.

 

Q4. How should I prepare my samples?

To ensure successful short peptide sequencing, MtoZ Biolabs recommends the following sample preparation guidelines:

1. Sample Type: We accept synthetic peptides, lyophilized powders, peptide mixtures, natural peptide extracts, and purified short peptide fractions

2. Sample Purity: Samples should be free from high concentrations of salts, detergents, glycerol, or strong buffers that may suppress ionization or interfere with fragmentation. A purity level of 70 percent or higher is recommended for optimal sequencing

3. Sample Amount: Please provide 50 to 200 μg of peptide material. Larger quantities may be required for complex or low-abundance samples

4. Storage and Shipping: Store peptide powders at -20 °C or -80 °C. Store peptide solutions at -80 °C. Ship samples in sealed, labeled containers. Solutions should be transported on dry ice to maintain stability

5. Documentation: Provide sequence expectations if applicable, sample origin preparation procedures, buffer composition, and any known or suspected modifications

 

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

 

If you are unsure about your sample preparation, our technical team can provide personalized pre-analysis consultation and a sample submission guide to help you optimize preparation and shipping conditions.

 

Start Your Project with MtoZ Biolabs

MtoZ Biolabs is committed to providing reliable short peptide sequencing service for researchers worldwide. With high-resolution platforms, standardized workflows, and professional analytical capabilities, we support customers in short peptide research drug development and structural confirmation. Contact us for more information.