Overview
Rat plasminogen is the inactive precursor of plasmin, a serine protease critical for degrading fibrin clots in the fibrinolytic pathway. Derived from rat plasma, it is widely employed in biomedical research due to its homology with human plasminogen and relevance in disease models. As a zymogen, it requires enzymatic cleavage (e.g., by tissue plasminogen activator, tPA) to become active plasmin. Its study aids in understanding thrombosis, hemostasis, and inflammatory processes, making it valuable for pharmaceutical development.
Physical and Chemical Properties
Rat plasminogen typically exhibits a molecular weight of 90-100 kDa, depending on glycosylation patterns. It is stable as a lyophilized powder but sensitive to proteolytic degradation in solution. The protein is soluble in neutral pH buffers like phosphate-buffered saline (PBS). Its structure includes kringle domains for fibrin binding and a catalytic domain for proteolytic activity post-activation. Purity is often verified via SDS-PAGE or HPLC, with commercial preparations exceeding 90% purity for research use.
Main Applications
In research, rat plasminogen is pivotal for studying fibrinolysis mechanisms, particularly in rodent models of thrombosis and stroke. It is used to evaluate thrombolytic drugs or gene therapies targeting clot dissolution. Additionally, it serves in wound healing studies, where plasmin-mediated matrix remodeling is investigated. Pharmaceutical companies utilize it in screening assays for novel anticoagulants or fibrinolytics, leveraging its cross-species relevance to human biology.
Safety and Storage
While the zymogen is non-proteolytic, activated plasmin can degrade labware coatings or extracellular proteins. Handle with gloves and avoid aerosolization. Store lyophilized powder at -20°C; reconstituted solutions should be aliquoted to minimize freeze-thaw cycles. Dispose of waste following institutional guidelines for biological materials. Shipping typically requires dry ice for stability, and long-term storage at -80°C is recommended for unused aliquots.
B2B Procurement Guide
When sourcing rat plasminogen, confirm the supplier’s quality control metrics, including endotoxin levels (<1 EU/mg) and absence of contaminating proteases. Bulk buyers should request batch-specific activity data and stability profiles. Consider suppliers specializing in rodent proteins for consistency. Lead times may extend to 4-6 weeks for customized preparations. Negotiate pricing tiers for orders exceeding 100 mg, and prioritize vendors offering technical support for assay optimization.
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