產品名稱：ELD-1人朗格漢斯細胞型樹突狀細胞、ELD-1人朗格漢斯細胞型樹突狀細胞、ELD-1人朗格漢斯細胞型樹突狀細胞、ELD-1人朗格漢斯細胞型樹突狀細胞；

outline a potential mechanism for self-nonself discrimination based on the C3d and iC3b proteolytic fragments of complement protein C3. The proposed C3 checkpoint works through complement receptor 3 (CR3), which binds both C3d and iC3b. The CR3 conformations involved