- Primary Structure Analysis
- High-resolution mass spectrometry molecular weight
- MALDI TOF mass spectrometry analysis
- N-terminal sequence analysis
- C-terminal sequence analysis
- N/C terminal sequence analysis
- Analysis of the K deletion ratio at the C-terminus of antibodies
- LC-MS/MS protein full sequence validation
- Peptide coverage / Peptide spectrum analysis
- Protein peptide profile determination
- Amino Acid Composition Analysis
- Extinction coefficient analysis
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- Advanced Structural Analysis
- Charge Heterogeneity Analysis
- Impurity Analysis
- Native Mass Spectrometry
- SDS-PAGE protein purity analysis
- Protein purity analysis (size exclusion/reverse phase chromatography)
- Host Cell Protein Residue (HCP) Analysis Service
- Antibody-Drug Conjugates (ADCs) Analysis
- Protein content analysis
- Product-related impurity analysis
- Analysis of other process-related impurities
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- Special Analysis
- Primary Structure Analysis
Basic Principles of Protein Mass Spectrometry Identification
Protein mass spectrometry identification is a method that uses mass spectrometry (MS) technology to analyze and identify the structure and composition of proteins. This technology has wide applications in proteomics, biomedical research, and drug development. The basic principles can be summarized in the following steps:
1. Sample Preparation
Protein samples first need to be prepared through various methods such as cell lysis, protein extraction, and purification. Then, proteins are usually cleaved into shorter peptides by enzymes (such as trypsin) to facilitate subsequent mass spectrometric analysis.
2. Ionization
The peptide samples are converted into charged gaseous ions using specific ionization techniques. Common ionization methods include electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI). This step is crucial for achieving protein mass spectrometry analysis.
3. Mass Analysis
The charged ions are introduced into a mass spectrometer and separated based on their mass-to-charge ratio (m/z). Mass analyzers can be of types such as time-of-flight (TOF), ion trap, Orbitrap, or quadrupole.
4. Detection
The separated ions produce signals on a detector, which are recorded and converted into a mass spectrum. The mass spectrum displays the relative abundance of ions at different mass-to-charge ratios, which can be used to deduce the mass of the peptides.
5. Data Analysis
Mass spectrometry data are processed and analyzed using specific software and algorithms. By comparing with known protein or peptide sequences in databases, proteins or peptides in the sample can be identified. This step usually involves complex data processing workflows, including mass matching of peptides and analysis of fragment ion patterns.
BiotechPack, A Biopharmaceutical Characterization and Multi-Omics Mass Spectrometry (MS) Services Provider
Related Services:
Protein Molecular Weight Determination by Mass Spectrometry
Mass Spectrometry-Based Sequence Analysis
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