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Peptides are short chains of amino acids that are linked together by peptide bonds and play a crucial role in many biological processes. They act as signalling molecules, hormones or enzymes and are often involved in the regulation of cell functions. Due to their diverse biological activities, peptides are of great importance in research and medicine, for example in the development of therapeutics and diagnostics.
High-performance liquid chromatography (HPLC) is a key method for analysing peptides. It enables the precise separation, identification and quantification of peptide structures, which is essential for quality control in peptide synthesis and for the characterisation of biological samples. HPLC offers high resolution and sensitivity, which is particularly important for complex peptide mixtures to ensure purity, stability and functionality.
Tryptic digestion is a widely used process for splitting proteins into smaller peptides. It uses the enzyme trypsin, which specifically cuts the peptide bonds after the amino acids lysine and arginine. This method is particularly useful for breaking down large proteins into manageable peptide fragments, which can then be further analysed. It plays a central role in proteomics, the study of proteins and their functions (bottom-up method).
After tryptic digestion, the resulting peptide fragments are often analysed using high-performance liquid chromatography (HPLC). HPLC makes it possible to separate the different peptides based on their size, polarity or charge. By combining HPLC with other analytical methods, such as mass spectrometry (HPLC-MS), proteins can be characterised in detail. This is important for the identification of proteins, the investigation of post-translational modifications and for quantitative analyses in biological samples.
HPLC - Reversed Phase:
Sample preparation - Tryptic Digest:
Sample preparation - Desalting and enrichment:
Sample preparation - Phosphopeptide enrichment:
Sample preparation - Desalting of phosphopeptides:
Sample preparation - removal of phosphopeptides:
Sample preparation - purification and enrichment of small samples:
Sample preparation - peptide fractionation:
HPLC - Reversed Phase:
HPLC - HILIC:
HPLC - SEC:
HPLC - Reversed Phase:
UHPLC - Reversed Phase:
HPLC - Normal Phase:
HPLC - Mixed-Mode:
UHPLC - Reversed Phase:
HPLC - Reversed Phase:
HPLC - HIC:
HPLC - metal affinity:
Sample preparation - Digestion:
UHPLC - Reversed Phase:
HPLC - Reversed Phase:
HPLC - IEX:
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