Functional Groups

Epithelial tissue creates protective boundaries and is involved in the diffusion of ions and molecules. Variance among different subclasses is less than the variance among different classes. For example, IgG1 is more closely related to IgG2, IgG3 and IgG4 than to IgA, IgM, IgD, or IgE. Consequently, antibody-binding proteins (e.g., Protein A or Protein G)…