The CD93/C1qR1 protein is thought to be a receptor or part of a larger complex and plays a crucial role in immune recognition by binding to C1q, mannose-binding lectin (MBL2), and pulmonary surfactant protein A (SPA) . Its interaction with these immune factors suggests a role in coordinating the innate immune response. CD93/C1qR1 Protein, Human (HEK293, His, solution) is the recombinant human-derived C1qR1/CD93 protein, expressed by HEK293, with C-His labeled tag.