Resources
Proteomics Databases
Metabolomics Databases
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• Mass Spectrometry Antibody Characterization
Mass spectrometry antibody characterization is a powerful analytical method used to investigate the structure, composition, and modifications of antibodies at the molecular level. Antibodies, as essential components of the immune system, possess complex structures and diverse functions. This technique provides detailed insights into amino acid sequences, glycosylation patterns, and other post-translational modifications (PTMs), enabling a deeper understanding of antibody functionality and mechanisms. ......
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• Mass Spectrometry Amino Acid Sequencing
Mass spectrometry amino acid sequencing is a highly sensitive and precise analytical method for determining the amino acid sequences of proteins and peptides. By leveraging the high resolution and sensitivity of mass spectrometry, this technique enables the detailed analysis of complex biological samples to elucidate protein structures. Amino acid sequences are the fundamental components of proteins, and understanding their arrangement is crucial for exploring protein functions, structures, and intera......
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• Peptide Sequencing Tandem Mass Spectrometry
Peptide sequencing tandem mass spectrometry is a highly sensitive and high-throughput analytical technique used to determine the amino acid sequences of proteins and peptides. By combining multi-stage mass analysis with specific peptide fragmentation patterns, this method enables the resolution of sequence information in complex protein samples. Unlike traditional Edman degradation, peptide sequencing tandem mass spectrometry can directly analyze complex mixtures, making it particularly suitable for s......
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• Peptide Sequencing by Edman Degradation
Peptide sequencing by Edman degradation is a well-established and highly effective method for determining the amino acid sequences of peptides and proteins. First introduced by Pehr Edman in 1950, this technique employs a stepwise chemical process to selectively cleave and identify N-terminal amino acids in a peptide chain. Through repeated cycles of cleavage and detection, Edman degradation enables precise determination of the sequential arrangement of amino acids, making it an invaluable tool in pro......
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• Protein Analysis by LC-MS/MS
Protein analysis by LC-MS/MS is a cornerstone of modern proteomics, leveraging the high-resolution separation capability of liquid chromatography (LC) and the sensitivity and precision of tandem mass spectrometry (MS/MS). This technique enables high-throughput identification and quantification of proteins in complex biological samples. It allows the characterization of thousands of proteins and their post-translational modifications (PTMs), offering valuable insights into dynamic changes and regulator......
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Urine proteomics focuses on the comprehensive analysis of proteins in urine samples using advanced high-throughput technologies. As a non-invasive and easily accessible biological fluid, urine serves as a valuable source for identifying biomarkers linked to physiological and pathological conditions. The primary objective of urine proteomics is to identify and quantify urinary proteins and their modifications, offering insights into their variations under different health states. This approach supports......
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Accurate mass identification is an essential technique in proteomics, used to precisely determine the molecular mass of protein or peptide components. Accurate mass measurement plays a critical role in protein identification and structural analysis. In mass spectrometry, this technique involves measuring the ionized molecular mass to deduce molecular formulas and structural details. Accurate mass identification is integral to modern biotechnology research, with applications spanning protein identifica......
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iTRAQ mass spectrometry is an advanced analytical technique primarily utilized in proteomics to achieve both relative and absolute quantification of proteins. By employing isotopic tags that chemically react with amino acids in peptides, this method enables the precise measurement of protein levels across multiple samples within a single mass spectrometry run. The key principle of iTRAQ mass spectrometry lies in isotopic labeling, which generates identical mass signals for the same proteins across dif......
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LC-MALDI-TOF integrates liquid chromatography (LC) with MALDI-TOF mass spectrometry, offering a powerful analytical platform widely used in proteomics and bioanalysis. LC enables the separation of complex biological samples, ensuring the isolation of individual components at defined time intervals. The separated components are mixed with a matrix-a compound that absorbs laser photons-preparing them for MALDI-based mass spectrometry. During analysis, laser pulses excite the matrix, resulting in ionizat......
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Untargeted proteomics is a technique that systematically investigates and analyzes all detectable proteins and their modifications in biological samples without relying on prior assumptions about specific targets. Unlike targeted proteomics, which focuses on predefined protein sets, untargeted proteomics employs high-throughput mass spectrometry to capture global protein expression profiles, modification patterns, and their changes under varying physiological and pathological conditions. This comprehe......
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