Which of the following act as opsonins?

Question

Quizplus · Accepted Answer

C3b is a complement protein that acts as an opsonin, binding to pathogens and targeting them for phagocytosis by immune cells. IgD is a type of antibody that functions in activating B cells, but it does not have opsonin activity. C5a is a complement protein that functions in inflammation and recruitment of immune cells, but it does not have opsonin activity. IL-2 is a cytokine that stimulates T cell growth and activation but it does not have opsonin activity.

Which of the Following Act as Opsonins