The proteolytic activity of proteases does not regulate the components of the complement system

C3b binds to the surfaces of DCs to assist in eliminating these cells

The complement system is part of the T cell receptor complex

The C3 molecule is hydrolyzed into C3a (a soluble mediator) and C3b (which activates other components of the complement system)

Small byproducts of proteolytic cleavage, such as C3a and C5a, are inactive