CTLA-4 is a key inhibitory receptor that serves as a major negative regulator of T cell responses in immune regulation. Its unique property is that its affinity to B7 ligands (CD80/CD86) is significantly higher than that of CD28. CTLA-4 Protein, Mouse (Biotinylated, HEK293, His) is the recombinant mouse-derived CTLA-4 protein, expressed by HEK293 , with C-His labeled tag.
