MtoZ Biolabs provides the SWATH Quantitative Plant Proteomics Service through a standardized DIA workflow. Using SWATH data-independent acquisition with LC-MS/MS quantitative proteomics, we deliver consistent protein quantification and differential protein profiling for plant tissues and plant-derived cell samples. This service helps researchers generate quantitative proteome datasets with fewer missing values and stronger reusability across multi-group and multi-batch studies, supporting mechanistic discovery and candidate biomarker prioritization.

Principle of SWATH Quantitative Proteomics

SWATH (Sequential Window Acquisition of All Theoretical Fragment Ion Spectra) represents a classic DIA acquisition concept. Unlike DDA, which relies on real-time precursor selection, SWATH divides a predefined m/z range into consecutive windows and systematically fragments ions within each window while recording MS/MS information, enabling more comprehensive and more reproducible signal acquisition. SWATH quantification is typically based on two analytical frameworks:

1. Library-Driven Analysis

• Using a prebuilt peptide fragment spectral library as a reference, targeted peptide chromatographic peaks are extracted from SWATH data for quantification.
• This approach offers clearly defined quantitative targets and strong consistency, making it suitable for cohort studies and cross-batch comparisons.

2. Library-Free or Light-Library Analysis

• Peptide signals are directly detected and matched within DIA data using computational algorithms, followed by protein-level quantitative summarization.
• This approach has a lower startup barrier, fits exploratory studies, and enables rapid generation of statistically analyzable quantitative result tables.

SWATH Quantitative Plant Proteomics Service at MtoZ Biolabs

The SWATH Quantitative Plant Proteomics Service at MtoZ Biolabs is designed for the complex matrix characteristics of plant samples and provides a one-stop solution from experimental design recommendations to final data delivery, with a focus on comparability, interpretability, and reusability. MS analysis is supported by high-resolution LC-MS/MS platforms combined with a robust nano-flow LC separation system, enabling SWATH-style DIA quantitative acquisition to meet the stability and scalability needs of plant quantitative research.

Workflow of SWATH Quantitative Plant Proteomics Service

Why Choose MtoZ Biolabs

• Plant-Focused Sample Preparation Experience: We pay close attention to common interferences such as cell wall components, polysaccharides and polyphenols, pigments, and secondary metabolites, reducing matrix effects and improving quantitative consistency.
• One-Time Pricing: The pricing scope and deliverables are clearly defined and transparent.
• Quantitatively analyze nearly all detectable molecules, including low-abundance proteins and peptides.
• High-Throughput: Identify and quantitate more than 2000 proteins at once.

Applications of SWATH Quantitative Plant Proteomics Service

1. Abiotic Stress and Adaptation Mechanisms

Protein changes associated with drought, salt stress, temperature stress, and oxidative stress.

2. Growth and Development Analysis

Quantitative comparisons across germination, flowering, organ differentiation, and senescence stages.

3. Cultivar and Genetic Improvement Research

Differential protein screening across mutants, transgenic lines, or different cultivars.

4. Plant Immunity and Interactions

Defense-related proteins and pathway-level insights in plant–pathogen interactions.

5. Quality and Metabolism-Related Research

Protein network changes associated with color, flavor, nutrition, or resistance-related traits.

Deliverables

• Experiment procedures
• Parameters of liquid chromatography and mass spectrometer
• MS raw data files
• Peptide identifications and intensities
• Protein identifications and intensities
• Bioinformatics analysis

Start Your Project with MtoZ Biolabs

Contact MtoZ Biolabs with your research goals and sample information. We will recommend an appropriate SWATH quantitative plan and deliverable package to help you move your project forward efficiently.

FAQs

Q1: What types of samples are suitable?

Suitable samples typically include:

• Plant tissues such as leaves, roots, stems, flowers, fruits, and seeds
• Plant cells and culture systems such as cell suspensions, callus tissue, and protoplasts
• Protein extracts may be accepted upon evaluation when sample information is complete and the buffer system is appropriate

To ensure comparability for SWATH quantification, we recommend providing clear group information and biological replicates. For samples rich in polysaccharides, polyphenols, or pigments, please inform us in advance so we can optimize the sample processing strategy.

Q2: What is the service’s general workflow?

Q3: What data formats are provided?

MtoZ Biolabs provides results in multiple standard formats to ensure compatibility with common analysis and visualization tools. Deliverables typically include:

• LC-MS/MS raw data files and essential run-level QC information
• Processed data tables in CSV or Excel format, including identification results, SWATH quantitative outputs, and differential analysis results
• Summary reports in PDF format, including a methods overview, QC highlights, and key findings
• High-resolution figures and spectra or chromatograms in PNG or TIFF formats

Additional file formats or data structures can be provided upon request to meet specific research or publication requirements.

Q4: How should I prepare my samples?

To obtain stable and reproducible SWATH quantification results, MtoZ Biolabs recommends preparing your samples according to the following guidelines:

• Sample Type: Provide information on species, tissue or cell source, treatment conditions, sampling time points, and group design.
• Sample Integrity: Process samples promptly under low-temperature conditions and avoid prolonged exposure at room temperature. Samples should be as clean as possible to minimize soil contamination, residual culture media, and visible debris.
• Amount Requirement: Please provide at least ≥ 200 mg of fresh plant tissue per sample. If submitting extracted protein, please provide ≥ 300 μg total protein (an MS-compatible buffer is recommended). If your sample amount is limited, please inform us in advance so we can evaluate feasibility and adjust the workflow accordingly.
• Storage and Shipping: Store samples at −80°C and avoid repeated freeze–thaw cycles. Ship on dry ice using leak-proof containers, and clearly label each tube with sample ID and group information.
• Documentation: Include a sample information sheet detailing buffer composition or additives, as well as the desired output type and comparison scheme.

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