Overview
Human trypsin is a digestive enzyme produced in the pancreas as an inactive zymogen (trypsinogen). It is activated in the small intestine and plays a critical role in breaking down dietary proteins into smaller peptides. Beyond digestion, it is extensively utilized in biotechnology and medical applications due to its specificity in cleaving peptide bonds. In industrial and research settings, recombinant human trypsin is preferred for its consistency and reduced risk of contamination compared to animal-derived variants. It is a staple in cell culture for detaching adherent cells and in proteomics for protein sequencing.
Physical and Chemical Properties
Human trypsin is a globular protein with a molecular weight of approximately 23.8 kDa. It functions optimally at a slightly alkaline pH (7.5–8.5) and is inactivated at pH extremes or by serine protease inhibitors like PMSF. The enzyme requires calcium ions for stability and exhibits maximal activity at 37°C. In solution, trypsin is prone to autolysis (self-digestion), which can be mitigated by storage at low temperatures (-20°C) or using trypsin inhibitors during experiments. Its lyophilized form is stable for years when stored desiccated.
Main Applications
In cell culture, trypsin is indispensable for passaging adherent cells by cleaving cell-surface proteins. It is also used in biopharmaceutical manufacturing to harvest recombinant proteins. In research, trypsin digestion is a key step in mass spectrometry-based proteomics. Medically, trypsin combined with other enzymes aids in wound debridement by dissolving necrotic tissue. It is also investigated for targeted drug delivery systems due to its substrate specificity.
Safety and Storage
Human trypsin is classified as a irritant and requires handling with PPE (gloves, goggles). Inhalation of powder may cause respiratory distress. Spills should be neutralized with a mild detergent and rinsed thoroughly. For long-term storage, lyophilized trypsin should be kept at -20°C in airtight containers. Reconstituted solutions are stable for 1–2 weeks at 4°C with protease inhibitors. Avoid repeated freeze-thaw cycles to prevent activity loss.
B2B Procurement Guide
When sourcing human trypsin, prioritize suppliers with ISO 13485 or GMP certification for consistent quality. Key specifications include activity (≥1,000 USP units/mg), low endotoxin levels (<0.1 EU/µg), and absence of animal-derived contaminants. Bulk buyers should request batch-specific CoA (Certificate of Analysis) and consider lyophilized formulations for cost-effective shipping. For cell culture, opt for 0.22 µm-filtered, sterile solutions to reduce contamination risks.
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