Overview
Rat galectin is a β-galactoside-binding protein involved in modulating immune responses and cellular interactions. It is part of the galectin family, which is conserved across vertebrates and plays roles in processes like apoptosis, cell adhesion, and inflammation. Rat-derived galectins are widely used in preclinical studies due to their relevance to human biology. Galectins lack carbohydrate domains and are secreted via non-classical pathways. Their ability to cross-link glycoproteins makes them essential for studying cell-surface interactions and signal transduction. Researchers often isolate rat galectins from tissues or recombinant systems for experimental use.
Physical and Chemical Properties
Rat galectin typically exists as a dimer under physiological conditions, with each subunit weighing approximately 14-15 kDa. Its structure includes a conserved carbohydrate-recognition domain (CRD) that binds to lactose and N-acetyllactosamine residues. The protein is stable in neutral pH buffers but may aggregate at high concentrations or under reducing conditions. Spectroscopic methods like circular dichroism (CD) confirm its secondary structure, which is predominantly β-sheet. Unlike small molecules, galectins do not have defined melting or boiling points, as they denature irreversibly when heated. Solubility is highest in saline or mild detergent-containing buffers.
Main Applications
In biomedical research, rat galectin is utilized to study T-cell regulation, tumor microenvironments, and fibrotic diseases. Its role in immune tolerance makes it a target for autoimmune disease therapies. For example, galectin-1 can suppress Th1 and Th17 responses, offering potential for treating multiple sclerosis or rheumatoid arthritis. Cancer research employs rat galectins to investigate metastasis, as they mediate tumor cell adhesion to vascular endothelium. Additionally, recombinant rat galectins are used in ELISA and flow cytometry assays to detect glycoprotein interactions. Their cross-species reactivity allows comparative studies with human galectins.
Safety and Storage
While rat galectin is not classified as hazardous, handling requires standard lab precautions: gloves, goggles, and lab coats. Avoid inhalation of lyophilized powder, which may irritate mucous membranes. Allergenic potential exists for individuals sensitive to rodent proteins; work in a fume hood if aerosolization is possible. For storage, aliquot the protein to minimize freeze-thaw cycles. Lyophilized galectin is stable for years at -80°C, while solutions should be used within weeks at 4°C or months at -20°C. Include protease inhibitors (e.g., PMSF) in buffers to prevent degradation during experiments.
B2B Procurement Guide
When sourcing rat galectin, prioritize vendors with ISO 9001 certification or GMP compliance for research-grade proteins. Key specifications include ≥95% purity (verified by Coomassie-stained gels), low endotoxin levels (<1 EU/μg), and functional activity data (e.g., hemagglutination assays). Bulk buyers should request batch-specific certificates of analysis (CoA) and consider recombinant options for scalability. Pricing varies by quantity and purity; academic discounts may apply. Lead times range from 2-6 weeks for custom preparations. For critical applications, validate supplier reliability through independent pilot testing.
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