On the associated state of rabbit allotypes, the existence of rabbit antibody molecules against two allotypes, and the dissociation of human γ-globulin antigens into smaller molecules

Abstract

This chapter discusses the physical, chemical, and biological aspects of γM antibodies in depth. The chapter describes the physical characteristics, chemical composition, and subunit structure of the typical circular γM pentomers and the relationship of these molecules to low molecular weight γM-like proteins. The characteristics of the interaction of γM antibodies with antigens—for example, the nature and number of antigen combining sites—and the interaction of γM antibodies with the complement system are compared to the corresponding properties of γG antibodies. The biosynthesis and metabolism of γM antibodies and their peculiar role in the immune response are also discussed in the chapter. The chapter presents a brief summary related to the hallmarks of immunoglobulin heterogeneity and the criteria that must be used to judge the restricted heterogeneity or molecular uniformity of an antibody preparation. The chapter discusses human antibodies to certain selected antigens that appear to possess less heterogeneity than normal γ-globulin.