Which one of the following is the best neutrophil and macrophage attractant?
C5a is a component of complement. Activation of complement by endotoxin, or antigen antibody complexes produces C5a, which is a neutrophil and macrophage attractant. The variable region of the heavy chain of IgG is not known as the best neutrophil or macrophage attractant. The J moiety of IgM and IgA does not possess chemotactic propeies for neutrophils and macrophages. HLA-A and HLA-B are genes for the human leucocyte antigens (HLA). Ref: Levinson W. (2012). Chapter 63. Complement. In W. Levinson (Ed), Review of Medical Microbiology & Immunology, 12e.
C5a
Variable region of the heavy chain of IgG
J chain
HLA-A